All Stories

  1. Modeling and optimization of bioproduct formation with purple phototrophic bacteria using machine learning

    Article • Bioresource Technology, November 2025, Elsevier

    Prof. Germán Buitrón

  2. Light/dark cycles and iron supplementation to enhance the simultaneous production of polyhydroxyalkanoates, 5-aminolevulinic acid, coenzyme Q10, and pigments through photofermentation

    Article • Bioresource Technology, August 2025, Elsevier

    Prof. Germán Buitrón

  3. Influence of the organic loading rate on the anaerobic treatment of winery effluents applying one and two stages

    Article • Water Science & Technology Water Supply, June 2025, IWA Publishing

    Prof. Germán Buitrón

  4. Biohydrogen production from cheese whey in UASB and packed bed reactors: Impact of microbial interactions on productivity

    Article • International Journal of Hydrogen Energy, June 2025, Elsevier

    Prof. Germán Buitrón

  5. The potential of long‐term wastewater‐based surveillance to predict COVID‐19 waves peak in Mexico

    Article • Water Environment Research, May 2025, Wiley

    Prof. Germán Buitrón

  6. Antibiotic resistance reduction mechanisms during thermophilic anaerobic digestion of microalgae-bacteria aggregates

    Article • Bioresource Technology, March 2025, Elsevier

    Prof. Germán Buitrón

  7. Ex-situ biogas enrichment by hydrogenotrophic methanogens at low H2/CO2 ratios: Effect of empty bed residence time

    Article • Fuel, February 2025, Elsevier

    Prof. Germán Buitrón

  8. Predicting metabolic pathways and microbial interactions in dark fermentation systems treating real cheese whey effluents

    Article • Bioresource Technology, December 2024, Elsevier

    Prof. Germán Buitrón

  9. Light–dark cycles improve the 3HV molar fraction in PHBV produced by photoheterotrophic bacteria from odd‐chain fatty acids and cheese whey

    Article • Journal of Chemical Technology & Biotechnology, November 2024, Wiley

    Prof. Germán Buitrón

  10. Assessment of the oxygen dynamics in microalgae–bacteria systems through respirometry

    Article • Journal of Chemical Technology & Biotechnology, October 2024, Wiley

    Prof. Germán Buitrón

  11. Inter-institutional laboratory standardization for SARS-CoV-2 surveillance through wastewater-based epidemiology applied to Mexico City

    Article • IJID Regions, September 2024, Elsevier

    Professor Roberto Parra Saldivar, Prof. Germán Buitrón

  12. Electrolytic production of hydrogen from fermented cheese whey wastewater

    Article • International Journal of Hydrogen Energy, June 2024, Elsevier

    Prof. Germán Buitrón

  13. Bioaccessibility Characterization of Organic Matter, Nitrogen, and Phosphorus from Microalgae-Bacteria Aggregates

    Article • Waste and Biomass Valorization, April 2024, Springer Science + Business Media

    Prof. Germán Buitrón

  14. Influence of pH and temperature on the performance and microbial community during the production of medium-chain carboxylic acids using winery effluents as substrate

    Article • Environmental Science and Pollution Research, April 2024, Springer Science + Business Media

    Prof. Germán Buitrón

  15. Process design and economic evaluation for methane and electricity production from Agave bagasse using different pretreatments

    Article • Energy Conversion and Management, April 2024, Elsevier

    Prof. Germán Buitrón

  16. Pretreatment of agave bagasse with ruminal fluid to improve methane recovery

    Article • Waste Management, March 2024, Elsevier

    Prof. Germán Buitrón

  17. Practical Applications of Dark Fermentation for Hydrogen Production

    Article • January 2024, Springer Science + Business Media

    Prof. Germán Buitrón

  18. Assessment of polyhydroxyalkanoates and polysaccharides production in native phototrophic consortia under nitrogen and phosphorous-starved conditions

    Article • International Journal of Environmental Science and Technology, December 2023, Springer Science + Business Media

    Prof. Germán Buitrón

  19. Nitrification activity in the presence of 2-chlorophenol using whole nitrifying cells and cell-free extracts: batch and SBR assays

    Article • 3 Biotech, October 2023, Springer Science + Business Media

    Prof. Germán Buitrón

  20. Efficient conversion of wine lees into medium-chain carboxylic acids by mixed culture using an in-line extraction system

    Article • Journal of Water Process Engineering, October 2023, Elsevier

    Prof. Germán Buitrón

  21. Organic Leachate and Biogas Utilization in Outdoor Microalgae Cultivation Under Alkaline Conditions at Pilot-Scale

    Article • Waste and Biomass Valorization, July 2023, Springer Science + Business Media

    Prof. Germán Buitrón

  22. Metabolic Functional Profiles of Microbial Communities in Methane Production Systems Treating Winery Wastewater

    Article • BioEnergy Research, July 2023, Springer Science + Business Media

    Prof. Germán Buitrón

  23. Biohydrogen production from fermented acidic cheese whey using lactate: Reactor performance and microbial ecology analysis

    Article • International Journal of Hydrogen Energy, July 2023, Elsevier

    Prof. Germán Buitrón

  24. Exploring resistomes and microbiomes in pilot-scale microalgae-bacteria wastewater treatment systems for use in low-resource settings

    Article • The Science of The Total Environment, July 2023, Elsevier

    Prof. Germán Buitrón

  25. Decoupling solid and hydraulic retention times in microalgal biofilm reactors treating primary wastewater: performance and biodiesel potential

    Article • Journal of Chemical Technology & Biotechnology, May 2023, Wiley

    Prof. Germán Buitrón

  26. Automatic Analysis of Isothermal Amplification via Impedance Time-Constant-Domain Spectroscopy: A SARS-CoV-2 Case Study

    Article • Chemosensors, April 2023, MDPI AG

    Prof. Germán Buitrón

  27. Polyhydroxyalkanoates and 5-aminolevulinic acid production by a mixed phototrophic culture using medium-chain carboxylic acids from winery effluents

    Article • Bioresource Technology, April 2023, Elsevier

    Prof. Germán Buitrón

  28. Monitoring of SARS‐CoV‐2 RNA in wastewater: A surveillance tool to foresee infection's evolution in the Mexican Caribbean

    Article • Water Environment Research, April 2023, Wiley

    Prof. Germán Buitrón

  29. Experimental evaluation of temperature, nutrients, and initial concentration on medium-chain carboxylic acids production from winery wastes

    Article • Water Science & Technology Water Supply, March 2023, IWA Publishing

    Prof. Germán Buitrón

  30. Hydrothermal kinetic modeling for microalgae biomass under subcritical condition cultivated in a close bubble tubular photobioreactor

    Article • Fuel, February 2023, Elsevier

    Prof Cristobal N Aguilar, Prof. Germán Buitrón

  31. Label-free and portable field-effect sensor for monitoring RT-LAMP products to detect SARS-CoV-2 in wastewater

    Article • Talanta, February 2023, Elsevier

    Prof. Germán Buitrón

  32. Degradation of viral RNA in wastewater complex matrix models and other standards for wastewater-based epidemiology: A review

    Article • TrAC Trends in Analytical Chemistry, January 2023, Elsevier

    Dr Adalberto Noyola, Professor Roberto Parra Saldivar, Prof. Germán Buitrón

  33. Polyhydroxybutyrate production in one-stage by purple phototrophic bacteria: Influence of alkaline pH, ethanol, and C/N ratios

    Article • Biochemical Engineering Journal, December 2022, Elsevier

    Prof. Germán Buitrón

  34. Biocatalyst developed with recovered iron-rich minerals enhances the biotransformation of SARS-CoV-2 antiviral drugs in anaerobic bioreactors

    Article • Journal of Water Process Engineering, December 2022, Elsevier

    Prof. Germán Buitrón

  35. Bioconversion of H2 and CO2 from dark fermentation to methane: Effect of operating conditions on methane concentration

    Article • Chemosphere, December 2022, Elsevier

    Prof. Germán Buitrón

  36. Feedback Control-Based Strategy Applied for Biohydrogen Production from Acid Cheese Whey

    Article • Waste and Biomass Valorization, July 2022, Springer Science + Business Media

    Prof. Germán Buitrón

  37. Experimental validation of an interval observer-based sensor fault detection strategy applied to a biohydrogen production dark fermenter

    Article • Journal of Process Control, June 2022, Elsevier

    Prof. Germán Buitrón

  38. Loop-mediated isothermal amplification-based electrochemical sensor for detecting SARS-CoV-2 in wastewater samples

    Article • Journal of Environmental Chemical Engineering, June 2022, Elsevier

    Prof. Germán Buitrón

  39. Study on manipulation of ruminal fermentation using a bioelectrochemical system

    Article • Journal of Animal Physiology and Animal Nutrition, May 2022, Wiley

    Prof. Germán Buitrón, Alfredo Varela-Echavarria

  40. Influence of the solids retention time on the formation of the microalgal-bacterial aggregates produced with municipal wastewater

    Article • Journal of Water Process Engineering, April 2022, Elsevier

    Prof. Germán Buitrón

  41. Cyanide treatment of mining tailings using suspended biomass and moving bed biomass reactors

    Article • Environmental Science and Pollution Research, January 2022, Springer Science + Business Media

    Prof. Germán Buitrón

  42. Biomass purge strategies to control the bacterial community and reactor stability for biohydrogen production from winery wastewater

    Article • International Journal of Hydrogen Energy, January 2022, Elsevier

    Prof. Germán Buitrón

  43. Bioconversion of H2 and Co2 from Dark Fermentation to Methane:Effect of Operating Conditions on Methane Concentration

    Article • SSRN Electronic Journal, January 2022, Elsevier

    Prof. Germán Buitrón

  44. Strategy for the formation of microalgae-bacteria aggregates in high-rate algal ponds

    Article • Environmental Technology, December 2021, Taylor & Francis

    Prof. Germán Buitrón

  45. Growth kinetics and quantification of carbohydrate, protein, lipids, and chlorophyll of Spirulina platensis under aqueous conditions using different carbon and nitrogen sources

    Article • Bioresource Technology, December 2021, Elsevier

    Prof Cristobal N Aguilar, Prof. Germán Buitrón

  46. Nutrient influence on acidogenesis and native microbial community of Agave bagasse

    Article • Industrial Crops and Products, October 2021, Elsevier

    Prof. Germán Buitrón

  47. Novel photo-microrespirometric method for the rapid determination of photosynthesis-irradiance (PI) curves in microalgal-bacterial systems

    Article • Algal Research, October 2021, Elsevier

    Prof. Germán Buitrón

  48. Transient shifts in hydraulic retention times improve the methane production from ruminal hydrolysates of agave bagasse

    Article • Journal of Chemical Technology & Biotechnology, July 2021, Wiley

    Prof. Germán Buitrón

  49. Influence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria

    Article • Water Science & Technology Water Supply, July 2021, IWA Publishing

    Prof. Germán Buitrón

  50. Thermophilic biogas production from microalgae-bacteria aggregates: biogas yield, community variation and energy balance

    Article • Chemosphere, July 2021, Elsevier

    Prof. Germán Buitrón

  51. Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production

    Article • Water Science & Technology Water Supply, June 2021, IWA Publishing

    Prof. Germán Buitrón

  52. Thermophilic anaerobic digestion of winery effluents in a two-stage process and the effect of the feeding frequency on methane production

    Article • Chemosphere, June 2021, Elsevier

    Prof. Germán Buitrón

  53. Biological treatment for the degradation of cyanide: A review

    Article • Journal of Materials Research and Technology, May 2021, Elsevier

    Prof. Germán Buitrón

  54. Recent advances in biopolymers production from biomass and waste (RABP-2020)

    Article • Bioresource Technology, May 2021, Elsevier

    Prof. Germán Buitrón

  55. Performance of native open cultures (winery effluents, ruminal fluid, anaerobic sludge and digestate) for medium-chain carboxylic acid production using ethanol and acetate

    Article • Journal of Water Process Engineering, April 2021, Elsevier

    Prof. Germán Buitrón

  56. Surveillance of SARS-CoV-2 in sewage and wastewater treatment plants in Mexico

    Article • Journal of Water Process Engineering, April 2021, Elsevier

    Prof. Germán Buitrón

  57. A review on the factors influencing biohydrogen production from lactate: The key to unlocking enhanced dark fermentative processes

    Article • Bioresource Technology, March 2021, Elsevier

    Prof. Germán Buitrón

  58. Polyhydroxyalkanoates from organic waste streams using purple non-sulfur bacteria

    Article • Bioresource Technology, March 2021, Elsevier

    Prof. Germán Buitrón

  59. H2S oxidation coupled to nitrate reduction in a two-stage bioreactor: Targeting H2S-rich biogas desulfurization

    Article • Waste Management, February 2021, Elsevier

    Prof. Germán Buitrón

  60. Microbial co-culturing strategies for the production high value compounds, a reliable framework towards sustainable biorefinery implementation – an overview

    Article • Bioresource Technology, February 2021, Elsevier

    Prof. Germán Buitrón

  61. Energy and economic advantages of simultaneous hydrogen and biogas production in microbial electrolysis cells as a function of the applied voltage and biomass content

    Article • Sustainable Energy & Fuels, January 2021, Royal Society of Chemistry

    Prof. Germán Buitrón

  62. Evaluation and ranking of polymeric ion exchange membranes used in microbial electrolysis cells for biohydrogen production

    Article • Bioresource Technology, January 2021, Elsevier

    Prof. Germán Buitrón

  63. Hydrogen production in two-chamber MEC using a low-cost and biodegradable poly(vinyl) alcohol/chitosan membrane

    Article • Bioresource Technology, January 2021, Elsevier

    Prof. Germán Buitrón

  64. Kinetic characterization of microalgal-bacterial systems: Contributions of microalgae and heterotrophic bacteria to the oxygen balance in wastewater treatment

    Article • Biochemical Engineering Journal, January 2021, Elsevier

    Prof. Germán Buitrón

  65. Hydrogen and methane production from microalgal biomass hydrolyzed in a discontinuous reactor inoculated with ruminal microorganisms

    Article • Biomass and Bioenergy, December 2020, Elsevier

    Prof. Germán Buitrón

  66. Fermentation of organic wastes and CO2 + H2 off-gas by microbiotas provides short-chain fatty acids and ethanol for n-caproate production

    Article • Journal of CO2 Utilization, December 2020, Elsevier

    Prof. Germán Buitrón

  67. Production of polyhydroxybutyrate by pure and mixed cultures of purple non-sulfur bacteria: A review

    Article • Journal of Biotechnology, June 2020, Elsevier

    Prof. Germán Buitrón

  68. Feasibility of quaternary ammonium and 1,4-diazabicyclo[2.2.2]octane-functionalized anion-exchange membranes for biohydrogen production in microbial electrolysis cells

    Article • Bioelectrochemistry, June 2020, Elsevier

    Prof. Germán Buitrón

  69. Swirling fluidization in an anoxic membrane bioreactor as an antifouling technique

    Article • Journal of Membrane Science, April 2020, Elsevier

    Prof. Germán Buitrón

  70. A comparison of biological, enzymatic, chemical and hydrothermal pretreatments for producing biomethane from Agave bagasse

    Article • Industrial Crops and Products, March 2020, Elsevier

    Prof. Germán Buitrón

  71. Stability problems in the hydrogen production by dark fermentation: Possible causes and solutions

    Article • Renewable and Sustainable Energy Reviews, March 2020, Elsevier

    Prof. Germán Buitrón

  72. Biorecovery of Metals from a Stainless Steel Industrial Effluent through Denitrification Performed in a Novel Anaerobic Swirling Fluidized Membrane Bioreactor (ASFMBR)

    Article • Industrial & Engineering Chemistry Research, January 2020, American Chemical Society (ACS)

    Prof. Germán Buitrón

  73. Characterization and anaerobic digestion of highly concentrated Mexican wine by-products and effluents

    Article • Water Science & Technology Water Supply, January 2020, IWA Publishing

    Prof. Germán Buitrón

  74. Comparison of suspended and granular cell anaerobic bioreactors for hydrogen production from acid agave bagasse hydrolyzates

    Article • International Journal of Hydrogen Energy, January 2020, Elsevier

    Prof. Germán Buitrón

  75. Standardized protocol for determination of biohydrogen potential

    Article • MethodsX, January 2020, Elsevier

    Prof. Germán Buitrón

  76. Essential Nutrients for Improving the Direct Processing of Raw Lignocellulosic Substrates Through the Dark Fermentation Process

    Article • BioEnergy Research, December 2019, Springer Science + Business Media

    Prof. Germán Buitrón

  77. Biohydrogen production from winery effluents: control of the homoacetogenesis through the headspace gas recirculation

    Article • Journal of Chemical Technology & Biotechnology, November 2019, Wiley

    Prof. Germán Buitrón

  78. Microalgal–bacterial aggregates with flue gas supply as a platform for the treatment of anaerobic digestion centrate

    Article • Journal of Chemical Technology & Biotechnology, November 2019, Wiley

    Prof. Germán Buitrón

  79. Biochemical methane potential from lignocellulosic wastes hydrothermally pretreated

    Article • Industrial Crops and Products, November 2019, Elsevier

    Prof. Germán Buitrón

  80. A standardized biohydrogen potential protocol: An international round robin test approach

    Article • International Journal of Hydrogen Energy, October 2019, Elsevier

    Prof. Germán Buitrón

  81. The hydraulic retention time influences the abundance of Enterobacter, Clostridium and Lactobacillus during the hydrogen production from food waste

    Article • Letters in Applied Microbiology, September 2019, Oxford University Press (OUP)

    Prof. Germán Buitrón

  82. Evaluation of the methane production rate from an acidogenic effluent generated in a two-stage process treating winery wastewater

    Article • Biomass Conversion and Biorefinery, July 2019, Springer Science + Business Media

    Prof. Germán Buitrón

  83. Biogas Production from a Highly Organic Loaded Winery Effluent Through a Two-Stage Process

    Article • BioEnergy Research, May 2019, Springer Science + Business Media

    Prof. Germán Buitrón

  84. A step-forward in the characterization of microalgal consortia: Microbiological and kinetic aspects

    Article • Biochemical Engineering Journal, May 2019, Elsevier

    Prof. Germán Buitrón

  85. Biohydrogen production using a granular sludge membrane bioreactor

    Article • Fuel, April 2019, Elsevier

    Prof. Germán Buitrón

  86. Fully aerobic bioscrubber for the desulfurization of H2S-rich biogas

    Article • Fuel, April 2019, Elsevier

    Prof. Germán Buitrón

  87. Supported ionic liquid membrane based on [bmim][PF6] can be a promising separator to replace Nafion in microbial fuel cells and improve energy recovery: A comparative process evaluation

    Article • Journal of Membrane Science, January 2019, Elsevier

    Prof. Germán Buitrón

  88. Bioelectrosynthesis of Methane Integrated With Anaerobic Digestion

    Article • January 2019, Elsevier

    Prof. Germán Buitrón

  89. Microbial Electrolysis Cell for Biohydrogen Production

    Article • January 2019, Elsevier

    Prof. Germán Buitrón

  90. Experimental validation of online monitoring and optimization strategies applied to a biohydrogen production dark fermenter

    Article • Chemical Engineering Science, November 2018, Elsevier

    Prof. Germán Buitrón

  91. Diagnosis of undesired scenarios in hydrogen production by photo-fermentation

    Article • Water Science & Technology Water Supply, October 2018, IWA Publishing

    Isaac Monroy, Prof. Germán Buitrón

  92. Co-digestion of microalga-bacteria biomass with papaya waste for methane production

    Article • Water Science & Technology Water Supply, July 2018, IWA Publishing

    Prof. Germán Buitrón

  93. Fully aerobic two-step desulfurization process for purification of highly H2 S-laden biogas

    Article • Journal of Chemical Technology & Biotechnology, July 2018, Wiley

    Prof. Germán Buitrón

  94. Biohydrogen production by batch indoor and outdoor photo-fermentation with an immobilized consortium: A process model with Neural Networks

    Article • Biochemical Engineering Journal, July 2018, Elsevier

    Isaac Monroy, Prof. Germán Buitrón

  95. Influence of Added Nutrients and Substrate Concentration in Biohydrogen Production from Winery Wastewaters Coupled to Methane Production

    Article • Applied Biochemistry and Biotechnology, June 2018, Springer Science + Business Media

    Prof. Germán Buitrón

  96. Temporary feeding shocks increase the productivity in a continuous biohydrogen-producing reactor

    Article • Clean Technologies and Environmental Policy, June 2018, Springer Science + Business Media

    Isaac Monroy, Prof. Germán Buitrón

  97. Use of solid phosphorus fractionation data to evaluate phosphorus release from waste activated sludge

    Article • Waste Management, June 2018, Elsevier

    Prof. Germán Buitrón

  98. Distinct effects of furfural, hydroxymethylfurfural and its mixtures on dark fermentation hydrogen production and microbial structure of a mixed culture

    Article • International Journal of Hydrogen Energy, May 2018, Elsevier

    Prof. Germán Buitrón

  99. Decolourization of Direct Blue 2 by peroxidases obtained from an industrial soybean waste

    Article • Water SA, April 2018, African Journals Online (AJOL)

    Prof. Germán Buitrón

  100. Effect of the variation of the operating parameters in the production of methane from lignocellulosic waste

    Article • IFAC-PapersOnLine, January 2018, Elsevier

    Prof. Germán Buitrón

  101. From mesophilic to thermophilic conditions: one-step temperature increase improves the methane production of a granular sludge treating agroindustrial effluents

    Article • Biotechnology Letters, December 2017, Springer Science + Business Media

    Prof. Germán Buitrón

  102. Improvement of methane content in a hydrogenotrophic anaerobic digester via the proper operation of membrane module integrated into an external-loop

    Article • Bioresource Technology, December 2017, Elsevier

    Prof. Germán Buitrón

  103. Fermentative biohydrogen production in fixed bed reactors using ceramic and polyethylene carriers as supporting material

    Article • Energy Procedia, December 2017, Elsevier

    Prof. Germán Buitrón

  104. Reduction of start-up time in a microbial fuel cell through the variation of external resistance

    Article • Energy Procedia, December 2017, Elsevier

    Prof. Germán Buitrón

  105. Hydrolysis of microalgal biomass using ruminal microorganisms as a pretreatment to increase methane recovery

    Article • Bioresource Technology, November 2017, Elsevier

    Prof. Germán Buitrón

  106. Microalgal-bacterial aggregates: Applications and perspectives for wastewater treatment

    Article • Biotechnology Advances, November 2017, Elsevier

    Prof. Germán Buitrón

  107. Influence of solar irradiance levels on the formation of microalgae-bacteria aggregates for municipal wastewater treatment

    Article • Algal Research, November 2017, Elsevier

    Prof. Germán Buitrón

  108. Kinetic characterization of Scenedesmus quadricauda under low irradiation conditions

    Article • Journal of Chemical Technology & Biotechnology, November 2017, Wiley

    Prof. Germán Buitrón

  109. Improvement of the bioelectrochemical hydrogen production from food waste fermentation effluent using a novel start-up strategy

    Article • Journal of Chemical Technology & Biotechnology, November 2017, Wiley

    Prof. Germán Buitrón

  110. Denitrification of metallurgic wastewater: mechanisms of inhibition by Fe, Cr and Ni

    Article • Journal of Chemical Technology & Biotechnology, September 2017, Wiley

    Francisco J. Cervantes, Prof. Germán Buitrón

  111. Evaluation of various cheese whey treatment scenarios in single-chamber microbial electrolysis cells for improved biohydrogen production

    Article • Chemosphere, May 2017, Elsevier

    Prof. Germán Buitrón

  112. H2 production in membraneless bioelectrochemical cells with optimized architecture: The effect of cathode surface area and electrode distance

    Article • Chemosphere, March 2017, Elsevier

    Prof. Germán Buitrón

  113. A novel gas separation integrated membrane bioreactor to evaluate the impact of self-generated biogas recycling on continuous hydrogen fermentation

    Article • Applied Energy, March 2017, Elsevier

    Prof. Germán Buitrón

  114. Enhancement of methane production from various microalgae cultures via novel ozonation pretreatment

    Article • Chemical Engineering Journal, January 2017, Elsevier

    Prof. Germán Buitrón

  115. Tratamiento biológico de aguas residuales: Principios, modelación y diseño

    Article • Water Intelligence Online, January 2017, IWA Publishing

    Prof. Germán Buitrón

  116. A Dynamic Model for Microalgae-Bacteria Aggregates Used for Wastewater Treatment

    Article • January 2017, Springer Science + Business Media

    Prof. Germán Buitrón

  117. Biohydrogen production from microalgae

    Article • January 2017, Elsevier

    Prof. Germán Buitrón

  118. Biohydrogen and methane production via a two-step process using an acid pretreated native microalgae consortium

    Article • Bioresource Technology, December 2016, Elsevier

    Prof. Germán Buitrón

  119. A mechanistic model supported by data-based classification models for batch hydrogen production with an immobilized photo-bacteria consortium

    Article • International Journal of Hydrogen Energy, December 2016, Elsevier

    Prof. Germán Buitrón, Isaac Monroy

  120. Corrigendum to “Enhancement of biofuel production via microbial augmentation: The case of dark fermentative hydrogen” [Renew Sustain Energy Rev 57 (2016) 879–891]

    Article • Renewable and Sustainable Energy Reviews, December 2016, Elsevier

    Prof. Germán Buitrón, Takuro Kobayashi

  121. Effect of volatile fatty acids mixtures on the simultaneous photofermentative production of hydrogen and polyhydroxybutyrate

    Article • Bioprocess and Biosystems Engineering, October 2016, Springer Science + Business Media

    Prof. Germán Buitrón

  122. Biological pretreatments of microalgal biomass for gaseous biofuel production and the potential use of rumen microorganisms: A review

    Article • Algal Research, September 2016, Elsevier

    Prof. Germán Buitrón

  123. Microrespirometric determination of the effectiveness factor and biodegradation kinetics of aerobic granules degrading 4-chlorophenol as the sole carbon source

    Article • Journal of Hazardous Materials, August 2016, Elsevier

    Prof. Germán Buitrón

  124. Enhancement of biofuel production via microbial augmentation: The case of dark fermentative hydrogen

    Article • Renewable and Sustainable Energy Reviews, May 2016, Elsevier

    Prof. Germán Buitrón

  125. Microalgae-bacteria aggregates: effect of the hydraulic retention time on the municipal wastewater treatment, biomass settleability and methane potential

    Article • Journal of Chemical Technology & Biotechnology, February 2016, Wiley

    Prof. Germán Buitrón

  126. Microbial communities from 20 different hydrogen-producing reactors studied by 454 pyrosequencing

    Article • Applied Microbiology and Biotechnology, January 2016, Springer Science + Business Media

    Prof. Germán Buitrón

  127. Robust observation strategy to estimate unknown inputs**This research was financed by CONACYT (project 100298) and PAPIIT-UNAM (project IN112114)

    Article • IFAC-PapersOnLine, January 2016, Elsevier

    Prof. Germán Buitrón

  128. Application of microbial electrolysis cells to treat spent yeast from an alcoholic fermentation

    Article • Bioresource Technology, January 2016, Elsevier

    Prof. Germán Buitrón, Professor Roberto Parra Saldivar

  129. BIOSORPTION OF CD, CR, MN, AND PB FROM AQUEOUS SOLUTIONS BY Bacillus SP STRAINS ISOLATED FROM INDUSTRIAL WASTE ACTIVATE SLUDGE

    Article • TIP Revista Especializada en Ciencias Químico-Biológicas, January 2016, Elsevier

    Prof. Germán Buitrón

  130. Investigating the effect of hydrogen sulfide impurities on the separation of fermentatively produced hydrogen by PDMS membrane

    Article • Separation and Purification Technology, January 2016, Elsevier

    Prof. Germán Buitrón

  131. Evaluation of different support materials used with a photo-fermentative consortium for hydrogen production

    Article • International Journal of Hydrogen Energy, December 2015, Elsevier

    Prof. Germán Buitrón

  132. Removal of p-nonylphenol isomers using nitrifying sludge in a membrane sequencing batch reactor

    Article • Chemical Engineering Journal, December 2015, Elsevier

    Prof. Germán Buitrón

  133. Optimization of volatile fatty acids concentration for photofermentative hydrogen production by a consortium

    Article • International Journal of Hydrogen Energy, December 2015, Elsevier

    Prof. Germán Buitrón

  134. Characterization of oxidized carbon foil as a low-cost alternative to carbon felt-based electrodes in bioelectrochemical systems

    Article • Journal of Applied Electrochemistry, November 2015, Springer Science + Business Media

    Prof. Germán Buitrón

  135. Hydrogen and butanol production from native wheat straw by synthetic microbial consortia integrated by species of Enterococcus and Clostridium

    Article • Fuel, November 2015, Elsevier

    Prof. Germán Buitrón

  136. Effect of microalgae inoculation on the start-up of microalgae–bacteria systems treating municipal, piggery and digestate wastewaters

    Article • Water Science & Technology Water Supply, October 2015, IWA Publishing

    Prof. Germán Buitrón

  137. Anaerobic digestion of mixed microalgae cultivated in secondary effluent under mesophilic and thermophilic conditions

    Article • Water Science & Technology Water Supply, July 2015, IWA Publishing

    Prof. Germán Buitrón

  138. Hydrogen production in a microbial electrolysis cell fed with a dark fermentation effluent

    Article • Journal of Applied Electrochemistry, June 2015, Springer Science + Business Media

    Prof. Germán Buitrón

  139. On-line heuristic optimization strategy to maximize the hydrogen production rate in a continuous stirred tank reactor

    Article • Process Biochemistry, June 2015, Elsevier

    Prof. Germán Buitrón

  140. Robust observation strategy to estimate the substrate concentration in the influent of a fermentative bioreactor for hydrogen production

    Article • Chemical Engineering Science, June 2015, Elsevier

    Prof. Germán Buitrón

  141. Simultaneous biohydrogen production and purification in a double-membrane bioreactor system

    Article • International Journal of Hydrogen Energy, January 2015, Elsevier

    Prof. Germán Buitrón

  142. Biohydrogen production from industrial wastewaters

    Article • Water Science & Technology Water Supply, November 2014, IWA Publishing

    Prof. Germán Buitrón

  143. Hydrogen and methane production via a two-stage processes (H 2 -SBR + CH 4 -UASB) using tequila vinasses

    Article • International Journal of Hydrogen Energy, November 2014, Elsevier

    Prof. Germán Buitrón

  144. Exploitation of anaerobic enriched mixed bacteria (AEMB) for the silver and gold nanoparticles synthesis

    Article • Colloids and Surfaces A Physicochemical and Engineering Aspects, November 2014, Elsevier

    Prof. Germán Buitrón, Prof. Gabriel Luna-Barcenas

  145. Biohydrogen production from tequila vinasses using a fixed bed reactor

    Article • Water Science & Technology Water Supply, October 2014, IWA Publishing

    Prof. Germán Buitrón

  146. Performance of a Single-Chamber Microbial Fuel Cell Degrading Phenol: Effect of Phenol Concentration and External Resistance

    Article • Applied Biochemistry and Biotechnology, September 2014, Springer Science + Business Media

    Prof. Germán Buitrón

  147. Comparison of hydrogen-producing bacterial communities adapted in continuous and discontinuous reactors

    Article • International Journal of Hydrogen Energy, September 2014, Elsevier

    Prof. Germán Buitrón

  148. A cost-effective strategy for the bio-prospecting of mixed microalgae with high carbohydrate content: Diversity fluctuations in different growth media

    Article • Bioresource Technology, July 2014, Elsevier

    Prof. Germán Buitrón

  149. The source of inoculum plays a defining role in the development of MEC microbial consortia fed with acetic and propionic acid mixtures

    Article • Journal of Biotechnology, July 2014, Elsevier

    Prof. Germán Buitrón

  150. Biodegradation of Toilet Wastewaters Generated in Aircrafts

    Article • Journal of the Chinese Chemical Society, April 2014, Wiley

    Prof. Germán Buitrón

  151. Effect of Starvation upon Activity of Microorganisms Degrading 4-Chlorophenol

    Article • Journal of the Chinese Chemical Society, April 2014, Wiley

    Prof. Germán Buitrón

  152. Membrane biofouling mechanism in an aerobic granular reactor degrading 4-chlorophenol

    Article • Water Science & Technology Water Supply, February 2014, IWA Publishing

    Prof. Germán Buitrón

  153. Improvement of the robustness of solar photo-Fenton processes using chemometric techniques for the decolorization of azo dye mixtures

    Article • Journal of Environmental Management, December 2013, Elsevier

    Prof. Germán Buitrón

  154. Biotic and abiotic characterization of bioanodes formed on oxidized carbon electrodes as a basis to predict their performance

    Article • Biosensors and Bioelectronics, December 2013, Elsevier

    Prof. Germán Buitrón

  155. Hydrogen production from acid and enzymatic oat straw hydrolysates in an anaerobic sequencing batch reactor: Performance and microbial population analysis

    Article • International Journal of Hydrogen Energy, October 2013, Elsevier

    Prof. Germán Buitrón

  156. Effect of the Organic Matter to Ammonia Ratio on Aerobic Granulation during 4-Chlorophenol Degradation in a Sequencing Batch Reactor

    Article • CLEAN - Soil Air Water, August 2013, Wiley

    Prof. Germán Buitrón

  157. Suppression of methanogenic activity in anaerobic granular biomass for hydrogen production

    Article • Journal of Chemical Technology & Biotechnology, July 2013, Wiley

    Prof. Germán Buitrón

  158. Azo dye decolorization assisted by chemical and biogenic sulfide

    Article • Journal of Hazardous Materials, April 2013, Elsevier

    Prof. Germán Buitrón

  159. Performance Evaluation of a Low-Cost Microbial Fuel Cell Using Municipal Wastewater

    Article • Water Air & Soil Pollution, February 2013, Springer Science + Business Media

    Prof. Germán Buitrón

  160. Kinetic and Physiological Evaluation of Ammonium and Nitrite Oxidation Processes in Presence of 2-Chlorophenol

    Article • Applied Biochemistry and Biotechnology, January 2013, Springer Science + Business Media

    Prof. Germán Buitrón

  161. Effect of the initial total solids concentration and initial pH on the bio-hydrogen production from cafeteria food waste

    Article • International Journal of Hydrogen Energy, September 2012, Elsevier

    Prof. Germán Buitrón

  162. Biodegradation of nonylphenols using nitrifying sludge, 4-chlorophenol-adapted consortia and activated sludge in liquid and solid phases

    Article • Environmental Technology, August 2012, Taylor & Francis

    Prof. Germán Buitrón

  163. Evaluation of three reagent dosing strategies in a photo-Fenton process for the decolorization of azo dye mixtures

    Article • Journal of Hazardous Materials, May 2012, Elsevier

    Prof. Germán Buitrón

  164. Biodegradation of 4-methylaniline in a sequencing batch reactor

    Article • Water Science & Technology Water Supply, March 2012, IWA Publishing

    Prof. Germán Buitrón

  165. Comparison of the Performance of Membrane and Conventional Sequencing Batch Reactors Degrading 4-Chlorophenol

    Article • Water Air & Soil Pollution, November 2011, Springer Science + Business Media

    Prof. Germán Buitrón

  166. Degradation of azo dye mixtures through sequential hybrid systems: Evaluation of three advanced oxidation processes for the pre-treatment stage

    Article • Journal of Photochemistry and Photobiology A Chemistry, September 2011, Elsevier

    Prof. Germán Buitrón

  167. Practical automatic control of a sequencing batch reactor for toxic wastewater treatment

    Article • Water Science & Technology Water Supply, February 2011, IWA Publishing

    Prof. Germán Buitrón

  168. Biodegradation kinetics of a mixture of phenols in a sequencing batch moving bed biofilm reactor under starvation and shock loads

    Article • Journal of Chemical Technology & Biotechnology, January 2011, Wiley

    Prof. Germán Buitrón

  169. Biohydrogen production from Tequila vinasses in an anaerobic sequencing batch reactor: Effect of initial substrate concentration, temperature and hydraulic retention time

    Article • Bioresource Technology, December 2010, Elsevier

    Prof. Germán Buitrón

  170. Treatment of fatty solid waste from the meat industry in an anaerobic sequencing batch reactor: start-up period and establishment of the design criteria

    Article • Water Science & Technology Water Supply, November 2009, IWA Publishing

    Prof. Germán Buitrón

  171. Controlled operation of a membrane SBR for inhibitory wastewater treatment

    Article • Water Science & Technology Water Supply, July 2009, IWA Publishing

    Prof. Germán Buitrón

  172. Acclimatization model of an aerobic bioreactor for the treatment of toxic wastewater

    Article • Simulation Modelling Practice and Theory, April 2009, Elsevier

    Prof. Germán Buitrón

  173. Solar photoassisted advanced oxidation process of azo dyes

    Article • Water Science & Technology Water Supply, March 2009, IWA Publishing

    Prof. Germán Buitrón

  174. Kinetic characterization and modeling simplification of an anaerobic sulfate reducing batch process

    Article • Journal of Chemical Technology & Biotechnology, January 2009, Wiley

    Prof. Germán Buitrón

  175. Effect of loading rate on TOC consumption efficiency in a sulfate reducing process: sulfide effect in batch culture

    Article • Journal of Chemical Technology & Biotechnology, December 2008, Wiley

    Prof. Germán Buitrón

  176. Effect of Starvation and Shock Loads on the Biodegradation of 4-Chlorophenol in a Discontinuous Moving Bed Biofilm Reactor

    Article • Applied Biochemistry and Biotechnology, October 2008, Springer Science + Business Media

    Prof. Germán Buitrón

  177. Automation of the acclimation phase in a sequencing batch reactor using dissolved oxygen regulation

    Article • Biotechnology Progress, September 2008, Wiley

    Prof. Germán Buitrón

  178. Controlled backwashing in a membrane sequencing batch reactor used for toxic wastewater treatment

    Article • Journal of Membrane Science, July 2008, Elsevier

    Prof. Germán Buitrón

  179. Anaerobic digestion of gelatinous water at laboratory and pilot scale and nitrogen inhibition

    Article • Water Science & Technology Water Supply, June 2008, IWA Publishing

    Prof. Germán Buitrón

  180. Performance of an optimally filled discontinuous bioreactor degrading 4-chlorophenol

    Article • Water Science & Technology Water Supply, June 2008, IWA Publishing

    Prof. Germán Buitrón

  181. Experiments for modelling the biodegradation of wastewater in sequencing batch reactors

    Article • Mathematical and Computer Modelling of Dynamical Systems, February 2008, Taylor & Francis

    Prof. Germán Buitrón

  182. Modeling for the optimal biodegradation of toxic wastewater in a discontinuous reactor

    Article • Bioprocess and Biosystems Engineering, October 2007, Springer Science + Business Media

    Prof. Germán Buitrón

  183. Evaluation of an optimal fill strategy to biodegrade inhibitory wastewater using an industrial prototype discontinuous reactor

    Article • Water Science & Technology Water Supply, April 2007, IWA Publishing

    Prof. Germán Buitrón

  184. ACCLIMATION MODEL OF AN AEROBIC BIOREACTOR FOR THE TREATMENT OF TOXIC WASTEWATER

    Article • IFAC Proceedings Volumes, January 2007, Elsevier

    Prof. Germán Buitrón, Professor Jaime A. Moreno

  185. AUTOMATION OF THE ACCLIMATION PHASE IN A SEQUENCING BATCH REACTOR DEGRADING INHIBITORY COMPOUNDS

    Article • IFAC Proceedings Volumes, January 2007, Elsevier

    Prof. Germán Buitrón

  186. The use of fatty acid methyl esters as biomarkers to determine aerobic, facultatively aerobic and anaerobic communities in wastewater treatment systems

    Article • FEMS Microbiology Letters, January 2007, Oxford University Press (OUP)

    Prof. Germán Buitrón

  187. Optimal biodegradation of phenol and municipal wastewater using a controlled sequencing batch reactor

    Article • Water Science & Technology Water Supply, December 2006, IWA Publishing

    Prof. Germán Buitrón

  188. Comparison of two types of inocula during acclimation and stable operation for nitrophenol biodegradation in an anaerobic-aerobic SBR

    Article • Water Science & Technology Water Supply, November 2006, IWA Publishing

    Prof. Germán Buitrón

  189. Effect of starvation on activity and viability of Pseudomonas aeruginosa ATCC 10145 degrading 4-chlorophenol

    Article • Water Science & Technology Water Supply, November 2006, IWA Publishing

    Prof. Germán Buitrón

  190. Degradation of acid orange 7 by a controlled anaerobic–aerobic sequencing batch reactor

    Article • Water Science & Technology Water Supply, July 2006, IWA Publishing

    Prof. Germán Buitrón

  191. Biodegradation of high 4-chlorophenol concentrations in a discontinuous reactor fed with an optimally controlled influent flow rate

    Article • Water Science & Technology Water Supply, May 2006, IWA Publishing

    Prof. Germán Buitrón

  192. On-line concentration measurements in wastewater using nonlinear deconvolution and partial least squares of spectrophotometric data

    Article • Water Science & Technology Water Supply, February 2006, IWA Publishing

    Prof. Germán Buitrón

  193. Optimal degradation of inhibitory wastewaters in a fed-batch bioreactor

    Article • Journal of Chemical Technology & Biotechnology, January 2006, Wiley

    Prof. Germán Buitrón, Professor Jaime A. Moreno

  194. Event-driven time-optimal control for a class of discontinuous bioreactors

    Article • Biotechnology and Bioengineering, January 2006, Wiley

    Prof. Germán Buitrón, Professor Jaime A. Moreno

  195. Practical optimal control of fed-batch bioreactors for the waste water treatment

    Article • International Journal of Robust and Nonlinear Control, January 2006, Wiley

    Prof. Germán Buitrón

  196. Effect of co-substrate, biomass and sulfate concentration on the performance of a control strategy used to determine the anaerobic stage length of an anaerobic/aerobic SBR degrading p-nitrophenol

    Article • Water Science & Technology Water Supply, July 2005, IWA Publishing

    Prof. Germán Buitrón

  197. Evaluation of two control strategies for a sequencing batch reactor degrading high concentration peaks of 4-chlorophenol

    Article • Water Research, March 2005, Elsevier

    Prof. Germán Buitrón

  198. CONTROL STRATEGIES FOR TREATING TOXIC WASTEWATER USING BIOREACTORS

    Article • IFAC Proceedings Volumes, January 2005, Elsevier

    Prof. Germán Buitrón, Professor Jaime A. Moreno

  199. Variation of the microbial activity during the acclimation phase of a SBR system degrading 4-chlorophenol

    Article • Water Science & Technology Water Supply, November 2004, IWA Publishing

    Prof. Germán Buitrón

  200. Influence of the origin of the inoculum and the acclimation strategy on the degradation of 4-chlorophenol

    Article • Bioresource Technology, September 2004, Elsevier

    Prof. Germán Buitrón

  201. Practical Optimal Control for Fed-Batch Bioreactors

    Article • IFAC Proceedings Volumes, September 2004, Elsevier

    Prof. Germán Buitrón

  202. Anaerobic/aerobic treatment of colorants present in textile effluents

    Article • Water Science & Technology Water Supply, July 2004, IWA Publishing

    Prof. Germán Buitrón

  203. Aerobic degradation of the azo dye acid red 151 in a sequencing batch biofilter

    Article • Bioresource Technology, April 2004, Elsevier

    Prof. Germán Buitrón

  204. Event-Driven Control for Treating Toxicants in Aerobic Sequencing Batch Bioreactors

    Article • IFAC Proceedings Volumes, March 2004, Elsevier

    Prof. Germán Buitrón

  205. Influence of the origin of the inoculum on the anaerobic biodegradability test

    Article • Water Science & Technology Water Supply, January 2004, IWA Publishing

    Prof. Germán Buitrón

  206. Modeling of the acclimation/deacclimation process of a mixed culture degrading 4-chlorophenol

    Article • Water Science & Technology Water Supply, January 2004, IWA Publishing

    Prof. Germán Buitrón

  207. Oxidation-Reduction Potential as a Control Variable for the Anaerobic Stage during Anaerobic-Aerobic p-Nitrophenol Degradation

    Article • Biotechnology Progress, December 2003, Wiley

    Prof. Germán Buitrón

  208. Pharmaceutical Wastewater Treatment Using an Anaerobic/Aerobic Sequencing Batch Biofilter

    Article • Journal of Environmental Science and Health Part A, October 2003, Taylor & Francis

    Prof. Germán Buitrón

  209. Influence of the initial substrate to microorganisms concentration ratio on the methanogenic inhibition test

    Article • Water Science & Technology Water Supply, September 2003, IWA Publishing

    Prof. Germán Buitrón

  210. Automated sequencing batch bioreactor under extreme peaks of 4-chlorophenol

    Article • Water Science & Technology Water Supply, May 2003, IWA Publishing

    Prof. Germán Buitrón

  211. Biodegradation of disperse blue 79 using sequenced anaerobic/aerobic biofilters

    Article • Water Science & Technology Water Supply, August 2001, IWA Publishing

    Prof. Germán Buitrón

  212. Degradation of p-nitrophenol in a batch biofilter under sequential anaerobic/aerobic environments

    Article • Water Science & Technology Water Supply, August 2001, IWA Publishing

    Prof. Germán Buitrón

  213. Strategies to enhance the biodegradation of toxic compounds using discontinuous processes

    Article • Water Science & Technology Water Supply, February 2001, IWA Publishing

    Prof. Germán Buitrón

  214. Observer-based time-optimal control of an aerobic SBR for chemical and petrochemical wastewater treatment

    Article • Water Science & Technology Water Supply, September 2000, IWA Publishing

    Prof. Germán Buitrón

  215. Production of activated carbon from petroleum coke and its application in water treatment for the removal of metals and phenol

    Article • Water Science & Technology Water Supply, September 2000, IWA Publishing

    Prof. Germán Buitrón

  216. Biotransformation of disperse blue 79 by an anaerobic sequencing batch biofilter

    Article • Water Science & Technology Water Supply, September 2000, IWA Publishing

    Prof. Germán Buitrón

  217. Use of a sequencing batch biofilter for degradation of azo dyes (acids and bases)

    Article • Water Science & Technology Water Supply, September 2000, IWA Publishing

    Prof. Germán Buitrón

  218. Start-up of a sequential anaerobic/aerobic batch reactor for the mineralization of p-nitrophenol

    Article • Water Science & Technology Water Supply, September 2000, IWA Publishing

    Prof. Germán Buitrón

  219. Influence of So/Xo Ratio on Anaerobic Activity Test

    Article • Water Science & Technology Water Supply, October 1999, IWA Publishing

    Prof. Germán Buitrón

  220. Influence of So/Xo ratio on anaerobic activity test

    Article • Water Science & Technology Water Supply, January 1999, IWA Publishing

    Prof. Germán Buitrón

  221. Respirometry based optimal control of an aerobic bioreactor for the industrial waste water treatment

    Article • Water Science & Technology Water Supply, August 1998, IWA Publishing

    Prof. Germán Buitrón

  222. Effect of compression–decompression on helminth eggs present in sludge of a settling tank

    Article • Water Research, March 1998, Elsevier

    Prof. Germán Buitrón

  223. Biodegradation of phenolic compounds by an acclimated activated sludge and isolated bacteria

    Article • Water Science & Technology Water Supply, February 1998, IWA Publishing

    Prof. Germán Buitrón

  224. Biodegradation of phenolic compounds by an acclimated activated sludge and isolated bacteria

    Article • Water Science & Technology Water Supply, January 1998, IWA Publishing

    Prof. Germán Buitrón

  225. Respirometry based optimal control of an aerobic bioreactor for the industrial waste water treatment

    Article • Water Science & Technology Water Supply, January 1998, IWA Publishing

    Prof. Germán Buitrón

  226. Comparison between Three Secondary Effluents in Tertiary High Rate Filtration

    Article • Environmental Technology, September 1996, Taylor & Francis

    Prof. Germán Buitrón

  227. Characterization of the microorganisms from an acclimated activated sludge degrading phenolic compounds

    Article • Water Science & Technology Water Supply, September 1996, IWA Publishing

    Prof. Germán Buitrón

  228. Characterization of the microorganisms from an acclimated activated sludge degrading phenolic compounds

    Article • Water Science & Technology Water Supply, January 1996, IWA Publishing

    Prof. Germán Buitrón

  229. Enhancement of the Biodegradation Activity by the Acclimation of the Inoculum

    Article • Environmental Technology, December 1995, Taylor & Francis

    Prof. Germán Buitrón

  230. Improvement and Control of the Microbial Activity of a Mixed Population for Degradation of Xenobiotic Compounds

    Article • Water Science & Technology Water Supply, April 1994, IWA Publishing

    Prof. Germán Buitrón

  231. Uptake rate and mineralization of hexadecane and naphthalene by a mixed aerobic culture

    Article • Water Research, May 1993, Elsevier

    Prof. Germán Buitrón

  232. Control of phenol biodegradation by using CO2evolution rate as an activity indicator

    Article • Environmental Technology, March 1993, Taylor & Francis

    Prof. Germán Buitrón

  233. Use of a sequencing batch reactor to study the biodegradation of 4-chlorophenol in soil

    Article • Biotechnology Techniques, February 1993, Springer Science + Business Media

    Prof. Germán Buitrón

  234. Microbial Activity Evolution during the Acclimation of a Mixed Culture to Phenol: Use of CO2 Evolution Rate as Indicator

    Article • Water Science & Technology Water Supply, November 1992, IWA Publishing

    Prof. Germán Buitrón