What is it about?
Treatment of wastewater produced from solid waste landfilling, This waste water contained many hazardous compounds. So that, we can not use biological treatment processes directly. Accordingly, we used chemical treatment as primary step after that we apply biological treatment
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Why is it important?
Landfill leachate which is generated due to the percolation of rainfall through wastes and the inherent water content resulting of chemical and biological reactions in waste's cells leads to serious environmental problems containing pollution of surface water, groundwater, soil and air. Therefore, treatment of landfill leachate is extremely necessary before discharging it into receiving water bodies
Perspectives
Fenton's pre-treatment process is very efficient for the reduction of organic compounds and substantially improved biodegradability of HLL. The optimum conditions were: pH value of 3.5, molar ratio (H2O2/Fe2+) of 5, H2O2 dosage of 25 mL/L and contact time of 15 min. The performance of UASB reactor for treatment of HLL is extremely low. However, the efficiency of the UASB reactor was substantially improved for treatment of pre-catalytic oxidation effluent. Fenton process followed by the DHS system is the best scenario for the treatment of HLL, resulting the highest removal efficiencies, i.e. CODt of 85 ± 1%, CODs of 85 ± 1%, CODp of 83 ± 8% and ammonia removal of 97%.
Dr. Sherif Ahmed Ismail
Zagazig University
Read the Original
This page is a summary of: Treatment of hazardous landfill leachate using Fenton process followed by a combined (UASB/DHS) system, Water Science & Technology Water Supply, December 2015, IWA Publishing,
DOI: 10.2166/wst.2015.655.
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