Elimination of organophosphate esters in A2O process of WWTP and pilot plant
ZHANG Dong-rui1, LI Sheng-hong1, ZHU Fen-fen1, LI Cheng-hui1, XU Yi-ping2, QING Da-han2, WANG Jia-wei3
1. School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China;
2. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
3. Research Center, Beijing Drainage Group, Beijing 100124, China
Many studies have shown that one of the important sources of OPEs in the environment is effluent of wastewater treatment plant (WWTP) and the biological treatment units in WWTP can remove some OPEs. In order to optimize the operating conditions of WWTP to make a better removal of macro and micro organic compounds, a suitable laboratory device is necessary. A set of A2O device was designed and installed in the laboratory and 3kinds of representative OPEs were added into the influent. The results show that the removal efficiencies of OPEs in the units of laboratory device were similar tothat in the same units of WWTP. The removal efficiencies of TBEP under both process conditions werehigh, with total removal rate of 84.6% and 83.6% respectively, while the removal efficiencies of TCPP under both conditions were low. In different treatment units, both TCPP in the anaerobic tank under two process conditions could be remove due to the hydrolysis in the anaerobic tank, and the removal rate in the anaerobic tank of laboratory A2O device (57.7%) was higher than that in the WWTP (25.5%). The removal of TBEP mainly occurred in the aerobic tank, and TBEP removal efficiency (67.9%) in secondary sedimentation tank of laboratory A2O device was higher than that in WWTP. Under twoprocess conditions, the aeration intensity of aerobic tank was large and the added tris (1-chloro-2-propyl) phosphate (TCPP) was hard to degrade, leading to the poor removal of TCPP in the aerobic tank. In addition, the sampling quantity of OPEs in A2O device was optimized to ensure the accuracy of the test.
张冬蕊, 李胜红, 朱芬芬, 李成辉, 许宜平, 青达罕, 王佳伟. A2O小试系统与实际工艺单元中OPEs去除的比较[J]. 中国环境科学, 2020, 40(6): 2426-2434.
ZHANG Dong-rui, LI Sheng-hong, ZHU Fen-fen, LI Cheng-hui, XU Yi-ping, QING Da-han, WANG Jia-wei. Elimination of organophosphate esters in A2O process of WWTP and pilot plant. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(6): 2426-2434.
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