倒置A^2/O工艺的原理与特点研究  

Principle and Characteristics of Reversed A^2/O Process

作　　者：张波[1] 高廷耀[2] 

机构地区：[1]青岛建筑工程学院环境工程系,山东青岛266033 [2]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《中国给水排水》2000年第7期11-15,共5页China Water & Wastewater

摘　　要：通过短时厌氧环境的生化特性、厌氧 /缺氧环境倒置效应和小型系统平行对比试验 ,较系统地研究了倒置A2 /O工艺的原理和工艺特点。指出 :①聚磷菌厌氧有效释磷水平的充分与否 ,并不是决定其在后续曝气条件下过度吸磷能力的充分必要条件。推进聚磷菌过度吸磷的本质动力与厌氧区HRT和厌氧环境的厌氧程度有关。在一定范围内 ,厌氧环境的HRT越长 ,厌氧程度越充分 ,聚磷菌的吸磷动力越强。②把常规生物脱氮除磷系统的厌氧、缺氧环境倒置过来 ,可以得到更好的脱氮除磷效果。小型系统平行对比试验表明 ,倒置A2 /O工艺的氮磷脱除功能明显优于常规A2 /O工艺 ,其COD去除能力则与常规A2 /O工艺相当。The biochemical characteristics of short time retention in anaerobic zone and sequence reversing of anaerobic and anoxic zones on phosphorus release and uptake were studied in bench scale experiments. The results showed that:(1) the effective phosphorus release, fully or not, is not the sufficient and necessary condition deciding the ability of excess P uptake. To a certain extent,a relatively longer HRT and a more sufficient anaerobic environment produce a stronger potential of excess P uptake in the following aerobic condition.(2) a much better effect of N P removal can be obtained in biological nutrient removal process by reversing the position of anaerobic and anoxic zones and turning into reversed A 2/O process. Its phosphorus and nitrogen removal rates are markedly higher than that of conventional A 2/O process, whereas the COD removal rates are about equal.

关 键 词：污水处理 脱氮 除磷 倒置A^2/O工艺 

分 类 号：X505[环境科学与工程—环境工程]