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.
出处
《环境科学与技术》
CAS
CSCD
北大核心
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)
关键词
投料A2/O工艺
混合液回流比
污泥回流比
脱氮除磷
A^2/O process with biofilm carrier
return ratio of mixed liquor
sludge return ration
nitrogen and phosphorus removal
