What is it about?
Old waste (aged refuse) from a landfill was excavated, which is rich in microbial consortia that have a high capacity to degrade many contaminates. The old waste was packed in a column where leachate of low biodegradability was fed at different times a day, prior to this, variables such as particle size and column height were defined. As response variables, COD, BOD, TN, TP and N-NH3 were used, removal efficiencies in all of them were greater than 85%. These results show that in countries like Mexico, bioreactors packed with old waste can be a promising technology to treat leachates with low biodegradability, despite being a biological system.
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Photo by Andrei Ciobanu on Unsplash
Why is it important?
Bioreactors packed with old waste is a friendly technology in its operation, with low sludge production and that can be applied to the different types of leachate generated in a sanitary landfill.
Perspectives
Thus, these results encourage further testing with compounds that are refractory to conventional biological processes, and, in general, with low biodegradability wastewater. Finally, considering the little attention that has been given in Latin America to the treatment of leachates from sanitary landfills, the use of old waste (Aged Refuse) for the treatment of these liquids provides a window of opportunity for the revaluation of MSW disposed in landfills or any other place of final disposal whose age exceeds at least 8 years.
Hugo Alejandro Nájera-Aguilar
Universidad de Ciencias y Artes de Chiapas
Read the Original
This page is a summary of: Treatment of Low Biodegradability Leachates in a Serial System of Aged Refuse-Filled Bioreactors, Sustainability, June 2019, MDPI AG,
DOI: 10.3390/su11113193.
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