作　　者： ; ; ; ;

机构地区： 华南理工大学环境科学与工程学院

出　　处： 《环境科学与技术》 2010年第2期142-145,共4页

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 工艺 混合液回流比 污泥回流比 脱氮除磷

领　　域： [环境科学与工程]