水力停留时间对A^2/O工艺脱氮除磷效率的作用  

Effects on Nitrogen and Phosphorus Removal in A^2/O Process by HRT

作　　者：潘欣语[1] 杨建宇[1] 李永峰[1,2] 

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150040 [2]上海工程技术大学化工学院,上海201620

出　　处：《黑龙江科学》2011年第4期1-4,24,共5页Heilongjiang Science

基　　金：国家973重大基础研究项目(编号:2009ZX09103-329);东北林业大学研究生科技创新项目(2010)

摘　　要：水力停留时间是制约A2/O工艺的关键因素,直接影响系统的脱氮除磷效率。本试验采用了50L的A2/O实验装置处理人工模拟生活污水,考察了不同HRT对A2/O工艺脱氮除磷的影响。实验结果表明:在厌氧/缺氧/好氧体积比为1∶1∶2,污泥回流比为75%,混合液回流比为200%的工况下处理生活污水,HRT对COD的影响较小,对NH3-N、TN以及TP的去除率影响较大,HRT为8h时,系统处理效果最佳。碳源不足同样制约着TN和NH3-N的去除率。TN、NH3-N的去除相对COD去除来讲需要较长的HRT,而HRT过长有对TP的去除不利。HRT is the key factor which restricts biological nutrients and phosphous removal by A2/O process. This paper intends to investigate how the HRT affects the removals of nitrogen and phosphous in synthetic brewage wastewater treatment plant with A2/O process with a working volume of 50L. It can be got that the HRT has less effect oil removal of COD than on that of ammonia nitrogen, TN and TP. The effect was best when HRT was 8h. The vol- ume ratio of anaerobic/anoxic/aerobic zone was 1：1：2 and sludge reccle ratio 75%, nitrate recycle ratio 200%. The results show that COD removal needs longer HRT than TN and NH3-N removal, but it is disadvantageous to TP removal when HRT is too long.

关 键 词：A2/O工艺 污水生物处理 脱氮除磷 HRT 

分 类 号：X703[环境科学与工程—环境工程]