摘要
根据城市污水厂二级出水的水质特点及排放特征,并结合回用水水质要求,设计小试实验装置,研究上向流曝气生物滤池+砂滤工艺对城市二级出水中污染物的去除效果。研究了在不同温度、气水比、溶解氧、水力负荷、有机负荷、填料高度等条件下,曝气生物滤池工作性能的变化。结果显示:该工艺CODCr平均去除率为42.5%。出水水质优于城市杂用水和景观用水及部分工业冷却用水的水质要求。
Accroding to the characteristic of the effluent from the simulative secondary sedimentation tank and the water quality of reclamation of sewage, an experiment was conducted to treat the effluent from the simulative secondary sedimentation tank by up-flow biological aerated filter and sand filtration process. The experiment studied the removal efficiency of pollutants and the characteristic of UBAF under different technical conditions, such as temperature, the ratio of gas to liquid, the media height, hydraulic load and organic load. The experiment showed that UBAF add sand filtration had high efficiency in the removal of pollutants. It could achieve 42.5% removal of CODCr. The effluent from sand filtration reactor had better water quality than standards of miscellaneous and landscaping water.
出处
《化学与生物工程》
CAS
2006年第3期48-50,共3页
Chemistry & Bioengineering
关键词
曝气生物滤池
砂滤
污水回用
up-flow biological aeratedfilter
sand filter
reclamation of sewage
