页岩气开采压裂返排水对污泥活性的影响

卢培利; 陈潮; 黄永葵; 刘俊; 张雯宇; 邱哲

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中国环境科学 ›› 2019, Vol. 39 ›› Issue (6) : 2452-2459.

水污染与控制

页岩气开采压裂返排水对污泥活性的影响

卢培利^1,2, 陈潮², 黄永葵^1,2, 刘俊², 张雯宇², 邱哲²

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The effect of the flowback water from shale gas extraction on the activated sludge

LU Pei-li^1,2, CHEN Chao², HUANG Yong-kui^1,2, LIU Jun², ZHANG Wen-yu², QIU Zhe²

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摘要

页岩气开发压裂返排水潜在环境风险，针对返排水经济环境友好的生物处理技术开发，以实际返排水和污水处理厂活性污泥为受试对象，通过呼吸测量实验，调查了返排水对活性污泥硝化活性和有机物氧化活性的影响，进一步识别了戊二醛，苯扎氯铵（ADBAC）和盐度对活性污泥的抑制作用.结果表明，返排水对活性污泥有机物氧化活性抑制极弱，对硝化活性抑制极强，半抑制浓度（IC₅₀）分别为75.5%，10.09%；戊二醛，苯扎氯铵（ADBAC）和盐度对硝化活性的IC₅₀分别为0.0589，0.0194，3.63g/L.活性污泥系统去除返排水中有机物具有可行性，若需同时脱氮则具有较大约束；戊二醛，苯扎氯铵（ADBAC）和盐度3种抑制因子对硝化活性抑制较强，杀菌剂与盐度的IC₅₀呈数量级差异，返排水生物处理尤其需要关注杀菌剂的影响.

Abstract

The development of shale gas is a state key energy strategy, the potential environmental risks caused by the flowback water have attracted attention. To develop the economical and environmentally friendly biological treatment technology for the flowback water, the activated sludge from the sewage treatment plant was used as the test subject in this study. The inhibitory effects of the organic oxidation activity and the nitrification activity of activated sludge was analyzed through the respiratory measurement experiment. The inhibitory effect of glutaraldehyde, benzalkonium chloride (ADBAC) and salinity on the activated sludge were further identified. The flowback water had very weak inhibition on the organic oxidation activity and very strong inhibition on the nitrification activity, and the 50% inhibitory concentration (IC₅₀) were 75.5% and 10.09%, respectively. The IC₅₀ of glutaraldehyde, ADBAC and salinity to the nitrification activity on activated sludge were 0.0589, 0.0194, 3.63g/L, respectively. The biological treatment of organic pollutants in flowback water was feasible, but it didn¢t work well on denitrification. Salinity, glutaraldehyde and ADBAC had inhibitory effect on the nitrification activity. IC₅₀ of the bactericide was in an order of magnitude difference from the IC₅₀ of the salinity, and the influence of the bactericide need to be paid more attention during biological treatment of the flowback water.

导出引用

卢培利, 陈潮, 黄永葵, 刘俊, 张雯宇, 邱哲. 页岩气开采压裂返排水对污泥活性的影响[J]. 中国环境科学. 2019, 39(6): 2452-2459

LU Pei-li, CHEN Chao, HUANG Yong-kui, LIU Jun, ZHANG Wen-yu, QIU Zhe. The effect of the flowback water from shale gas extraction on the activated sludge[J]. China Environmental Science. 2019, 39(6): 2452-2459

中图分类号： X703

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