The Performance of Microelectrolysis in Improving the Biodegradability Landfill Leachate

Abstract:

The aim of this study was to check the effectiveness of microelectrolysis for the pretreatment of a municipal landfill leachate with the objective improving its overall biodegradability, evaluated in terms of BOD₅/COD ratio, up to a value compatible with biological treatment. The best microelectrolysis operational conditions for achieving the desired COD values were: pH=2.0; granular activated carbon (GAC) =10 g/L; mass ratio of zero iron (Fe⁰)/GAC=2:1; reaction time=90 min. The BOD₅/COD was significantly improved from 0.12 to 0.31, which allowed an almost 85% removal of COD by a sequential activated sludge process. The results show that the microelectrolysis is a promising technology to improve the biodegradability of mature landfill leachate.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 1399-1402
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.1399
• Online since: October 2013
• Authors: Ling Zhao*, Xiao Gu Cheng, Ping He Yin, Gang Lu, Jun Chang Suo
• Keywords: Activated Sludge, Biodegradability Enhancement, Landfill Leachate, Microelectrolysis

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