深水曝气式A^2O与MBR组合工艺用于污水厂升级改造  

Combined Process of A^2O with Deep Aeration and MBR for Upgrading and Retrofitting of WWTP

作　　者：金鹏康[1] 杨毅[1] 王勇 王晓昌[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]长庆油田安全环保处,陕西西安710021

出　　处：《中国给水排水》2011年第18期76-78,82,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50978211);国家水体污染控制与治理科技重大专项(2008ZX07317-004)

摘　　要：西北某县城污水厂为提高处理能力(由2 000 m3/d提高到5 000 m3/d),亟需进行升级改造。由于受建设用地的限制,活性污泥处理工艺与MBR的组合工艺成为改造首选工艺。考虑到原水N、P浓度较高,活性污泥工艺采用A2O工艺。在有限的占地面积内,好氧池、厌氧池和缺氧池的有效水深均为10.5 m以保证充分的水力停留时间。实际应用效果表明,A2O与MBR组合工艺的各项出水指标均达到绿化和冲厕的回用水水质标准。在处理成本方面,该处理厂以其深水曝气对氧的高效利用而优于传统处理工艺。In order to increase the treatment capacity of a county wastewater treatment plant in northwest China, from 2 000 m^3/d to 5 000 m^3/d, the upgrading and retrofitting were carried out. Because of construction land limit, the combined process of activated sludge process and MBR was the best choice. Based on the raw wastewater characteristics of high nitrogen and phosphorus, the A2O process was adopted in activated sludge process after the upgrading and retrofitting. In the limited land area, the effective depths of aerobic tank, anaerobic tank and anoxic tank all reached 10.5 m for achieving sufficient hydraulic retention time. The practical application results show that the effluent indexes of the combined process of A2O and MBR can reach the reclaimed water standard for toilet flushing and gardening. In costs, due to its high efficiency of oxygen use, the deep aeration used in this plant is superior to the traditional process.

关 键 词：A2O/MBR组合工艺 污水处理 再生利用 

分 类 号：X703[环境科学与工程—环境工程]