Abstract—The goal of this experiment is to evaluate the effectiveness of different leachate pre-treatment options in terms of COD and ammonia removal. This research focused on the evaluation of physical-chemical methods for pre-treatment of leachate that would be effective and rapid in order to satisfy the requirements of the sewer discharge by-laws. The four pre-treatment options evaluated were: air stripping, chemical coagulation, electro-coagulation and advanced oxidation with sodium ferrate. Chemical coagulation reported the best COD removal rate at 43%, compared to 18% for both air stripping and electro-coagulation, and 20% for oxidation with sodium ferrate. On the other hand, air stripping was far superior to the other treatment options in terms of ammonia removal with 86%. Oxidation with sodium ferrate reached only 16%, while chemical coagulation and electro-coagulation removed less than 10%. When combined, air stripping and chemical coagulation removed up to 50% COD and 85% ammonia.
Index Terms—Leachate pretreatment, air stripping, chemical coagulation, electro-coagulation, oxidation.
Q. Yuan and J. Oleszkiewicz are with the Department of Civil Engineering, University of Manitoba, Winnipeg, Canada, MB R3T 5V6 (e-mail: qiuyan.yuan@umanitoba.ca, jan.oleszkiewicz@umanitoba.ca).
M. Poveda is with University of Manitoba, Canada (e-mail: mariopq@gmail.com).
Cite: M. Poveda, Q. Yuan, and J. Oleszkiewicz, "The Effectiveness of Pretreatment Methods on COD and Ammonia Removal from Landfill Leachate," International Journal of Environmental Science and Development vol. 7, no. 4, pp. 257-262, 2016.
