简易改造城市污水厂的脱氮除磷新工艺

城市污水中氮、磷的处理是水污染控制的一个重要问题。自２０世纪７０年代起，氮、磷污染就引起了世界各国的关注。而我国现有的城市污水处理厂绝大多数不具备脱氮除磷能力，随着我国的财力和国民环境意识的不断增强和提高，对氮、磷的控制势必会越来越受到到重视。这里简要介绍在室到万吨级生产性试验的基础上，提出了时序ＡＡＯ新工艺、倒置Ａ／Ａ／Ｏ新工艺，同步ＡＡＯ新工艺，这三种新工艺可在基本上不增加或少增加投资的情况下

New Processes for Simply Retrofitting Municipal Sewage Treatment Plants to Achieve Nitrogen and Phosphorus Removal

Nitrogen and phosphorus removal is important in water pollution control. Since 1970s, the problem of nitrogen and phosphorus pollution has been emphasized worldwidely. Most of municipal sewage treatment plants in China have not the function of nitrogen and phosphorus removal, the control for nitrogen and phosphorus will thus be more and more emphasized with the development of national economy and the improvement of environmental consciousness. Based on the experiments from bench scale to field scale (treatment capacity of 21 000 m 3 per day), the paper proposed three new processes, namely time sequence AAO process, reverse A/A/O process and simultaneous AAO process, which can upgrade present municipal sewage treatment plants to achieve high efficiency of nitrogen and phosphorus removal without the loss of previous w (COD Cr ) and w (BOD 5) removal ability while no extra investment or only little of it is required.