回流比对投料A^2/O工艺脱氮除磷影响的中试研究  

Effect of Mixed-liquid Return Ratio on A^2/O Process Performance

作　　者：李银波[1] 周少奇[1,2] 邱育真[1] 吴硕贤[2] 

机构地区：[1]华南理工大学环境科学与工程学院 [2]华南理工大学亚热带建筑科学国家重点实验室,广东广州510641

出　　处：《环境科学与技术》2010年第2期142-145,共4页Environmental Science & Technology

基　　金：广州市环境保护局污染防治新技术开发项目资助(200803)

摘　　要：试验采用了投料A2/O脱氮除磷工艺在广州市某污水处理厂进行中试,考察了不同混合液回流比及污泥回流比对投料A2/O工艺脱氮除磷的影响。结果表明,混合液回流比对COD、TP和NH3-N影响较小,对TN的去除率影响较大,系统混合液回流比为200%时,系统处理效果最佳;污泥回流比对系统整体功能的影响较大,随污泥回流比的增大,各指标的去去除率随之增大,结合处理效果和能耗情况,污泥回流比为75%时系统效果最佳。This paper intends to investigate how the ratios of return mixed liquor and return sludge affect the removals of nitrogen and phosphorus in a municipal wastewater treatment plant with A^2/O process. Thus an experiment was conducted on a pilot-plant-scale installation of a series of tanks with biofilm carriers added in theaeration tank. Result indicates the mixed-liquor return ratio value has less effect on removal of COD and TP than on that of ammonia nitrogen. In general, with the sludge return ratio increasing, the A^2/O performance is improved, and the ratio of 75% is considered to be appropriate when energy consumption being taken into account.

关 键 词：投料A2/O工艺 混合液回流比 污泥回流比 脱氮除磷 

分 类 号：X703.1[环境科学与工程—环境工程]