Ozonation as polishing treatment of mature landfill leachate

Journal of Hazardous Materials
Susana CortezManuel Mota

Abstract

Mature landfill leachate is typically resistant to biological processes. In order to enhance the biodegradability of a pre-treated mature landfill leachate, ozonation treatments in a lab-scale column were assayed under different ozone concentrations, contact time, initial pH, and hydrogen peroxide concentrations. Degradation of the landfill leachate by ozone was favoured at higher pH values and with the addition of H(2)O(2), both consistent with the enhanced production of the hydroxyl radical under such conditions. The highest organic reduction and biodegradability improvement was observed with the O(3)/H(2)O(2) process at 600 mg H(2)O(2) L(-1). This system was able to remove 63% of chemical oxygen demand (COD), 53% of total organic carbon (TOC), 42% of aromatic content (UV(254)) and increased the leachate 5-day biochemical oxygen demand (BOD(5)) to COD ratio from 0.01 to 0.17. Ozone combined with H(2)O(2) contributed significantly to remove and change the recalcitrant organic matter and improved leachate biodegradability, which makes this process very attractive as pre-biological treatment.

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Citations

Dec 3, 2014·Journal of Hazardous Materials·Yu-Chieh ChouChih-Jung Yeh
Feb 6, 2016·Environmental Science and Pollution Research International·Lokeshkumar P Ramteke, Parag R Gogate
Sep 6, 2015·Environmental Science and Pollution Research International·Elise Grisey, Lotfi Aleya
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Aug 27, 2013·Water Research·Belal BakheetYujue Wang
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Mar 25, 2014·Bioresource Technology·Chao WangXiaoyuan Wang
Apr 12, 2015·Journal of Hazardous Materials·Huijiao WangYujue Wang
Jan 18, 2017·Environmental Technology·Nasr Bensalah, Ahmed Bedoui
Nov 22, 2017·Environmental Technology·Ana Paula Jambers ScandelaiCélia Regina Granhen Tavares
Jun 13, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·S SanchisJ Garcia-Montaño
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