上海市嘉定区污水处理厂可吸附有机卤素状况研究

Distribution of AbsorbableOrganohalogens in Effluent and Sludge from Jiading District Sewage Treatment Plant in Shanghai

用微库仑法测定上海市嘉定区污水处理厂污泥、进水、出水及其周边地表水中AOX的浓度。地表水、污水厂出水和污水厂进水中AOX加标回收率范围分别为87.9%~101.2%,82.6%~90.1%和80.7%~82.3%。污泥样品的加标回收率范围为85.0%~103.9%,相比于水体样品,污泥样品加标回收率较低,精密度也更低。各污水处理厂排口附近地表水中的AOX浓度与进、出水AOX浓度呈明显正相关;污水厂处理设施对AOX的净化率范围为40%~55%;出水中AOX浓度相比于进水下降近一半,而污水厂污泥中AOX含量较高,说明部分AOX沉降在污泥中。

AOX concentration in sludge,influent,effluent and surrounding surface water of Jiading District sewage treatment plant in Shanghai was determined by microcoulometry.The spiked recoveries of AOX in surface water,effluent water and effluent water are 87.9%~101.2%,82.6%~90.1%and 80.7%-82.3%,respectively.The spiked recoveries of sludge samples range from 85.0%to 103.9%.Compared with water samples,sludge samples have lower recovery rate and lower precision.The AOX concentration in the surface water near the outfall of each sewage treatment plant was positively correlated with the AOX concentration in the inlet and outlet.The AOX purification rate of sewage treatment facilities ranges from 40%to 55%.AOX concentration in outgoing water decreased by nearly half compared with that in incoming water,while AOX content in sewage sludge was higher,indicating that part of AOX settled in the sludge.