生物慢滤池用于污水深度处理的实验研究

利用生物慢滤池对人工模拟污水和西安市某污水处理厂的二级出水进行了深度净化处理实验,通过分析进出水中氮、磷含量和高锰酸盐指数及上层水和出水中的叶绿素a含量等指标,考察了生物慢滤池的净化效果。结果表明:生物慢滤池对人工模拟污水的处理效果较好,总氮、氨氮、总磷和高锰酸盐指数的去除率分别为66.4%、40.2%、66.4%和73.3%;深度净化污水厂二级出水,总氮、氨氮、总磷和高锰酸盐指数的去除率分别为35.1%、21.0%、30.2%和12.6%,去除率略低于人工模拟实验;生物慢滤池对叶绿素a有很好的截留效果,去除率分别为93.4%和66.4%;生物慢滤池处理后的再生水水质达到《城市污水再生利用景观环境用水水质》要求,可回用于城市景观水体,作为城市景观水体的补充水源,避免水体富营养化的发生。

Experiment on advanced purification of sewage with biological slow filter pool

The paper carried out advanced purification experiment on both simulated wastewater and the secondary effluent of a wastewater treatment plant in Xi'an by applying biological slow filter pool. The purification effect was evaluated through the analysis of nitrogen, phosphorus contents and potassium permanganate indices in the influent and effluent as well as chlorophyll a content in the overlying water and effluent. The results suggested that biological slow filter showed better treatment performance on simulated sewage and the removal rate of total nitrogen, ammonia nitrogen, total phosphorus and potassium permanganate index is 66.4%, 40.2%, 66.4% and 73.3% respectively;the removal rate of the secondary effluent of a wastewater treatment plant to which is 35.1%, 21.0%, 30.2% and 12.6%,the removal rate is lower than that of manual simulated test.Moreover, biological slow filter has good retention effect to chlorophyll a, the removal rate is 93.4% and 66.4% respectively. The quality of the reclaimed water treated by the biological slow filter reaches the requirements of water quality standard for scenic environment use.Therefore, the reclaimed water can be re-used as urban landscape water body and prevent the occurrence of eutrophication.