两段活性污泥法在老污水处理厂提标改造中的应用

Two-Stage Activated Sludge Process Applied to Renovation of Old Sewage Treatment Works

污水处理厂要具备脱氮除磷的功能,但20世纪80年代前建成的污水厂大多不具备这项功能。在老厂改造中最大的难题是用地紧张。为了提高处理深度,首先要充分挖潜并选择高效的处理工艺。介绍了传统的两段活性污泥法的经过、发展和改良。最后以上海5座老污水处理厂的改造实例,介绍了具体改造方案。目前这5座厂出水都达到了设计指标。

The sewage treatment works shall have the function of denitrification and phosphorous removal, but most the sewage works built before the 1980s don't have such a function, and shortage of land is the most difficult for renovation of old works. For further treatment of sewage, it is a must to make full use of old works and select the treatment process of high efficiency. The development and modification of the traditional two-stage activated sludge process is introduced hereby. Finally with 5 treatment works renovation for example, specific proposals are introduced. Effluents from those works are all to the design standard.