混合液及污泥回流比对MUCT工艺缺氧吸磷的影响  

Influence of Mixed-liquor Return Ratio and Sludge Return Ratio on Anoxic Phosphorus Uptake of MUCT Process

作　　者：尹军[1] 叶龙[1] 吴相会[1] 王晓玲[1] 王华伟[1] 

机构地区：[1]吉林建筑工程学院水污染控制及污水资源化利用吉林省重点实验室,吉林长春130021

出　　处：《中国给水排水》2009年第11期28-32,共5页China Water & Wastewater

基　　金：吉林省重大科技发展计划项目(20040405-1)

摘　　要：以C/N值较低的模拟生活污水为处理对象,研究了当硝化液回流比保持不变时,混合液回流比(r)和污泥回流比(s)对MUCT工艺缺氧吸磷的影响。结果表明:当r和s均为1时,缺氧区2和缺氧区3中的DPB利用厌氧段储存的大量PHB为碳源,以硝酸盐氮为电子受体进行吸磷,吸磷量分别稳定在132.91 mg/h和105.38 mg/h左右,缺氧吸磷率维持在46.58%左右;r和s对COD总去除率的影响不大,系统对COD、NH4+-N、TP的去除率分别达到91.86%、98.83%和90%,出水COD、NH4+-N和TP分别在30、0.8和0.9 mg/L以下。Using the synthetic domestic sewage with low C/N as treatment object, the influence of mixed-liquor return ratio and sludge return ratio on anoxic phosphorus uptake in the MUCT process was investigated when the nitrated-liquor return ratio was kept constant. The results show that when the mixed-liquor return ratio and the sludge return ratio are all equal to 1, DPB can uptake phosphorus using PHB as carbon source in the anoxic zones 2 and 3, and nitrate as electron acceptor. The maximum phosphorus uptake amounts are 132.91 mg/h and 105.38 mg/h respectively. The anoxic phosphorus uptake rate is maintained at 46.58%. The mixed-liquor return ratio and the sludge return ratio have little impact on the total removal rate of COD. The average removal rates of COD, NH4^＋ - N and TP by the whole system reach 91.86%, 98.83% and 90% respectively. The effluent COD, NH4^＋ - N and TP are below 30 mg/L, 0.8 mg/L and 0.9mg/L respectively.

关 键 词：MUCT工艺 反硝化除磷 反硝化聚磷菌 缺氧吸磷率 

分 类 号：X703[环境科学与工程—环境工程]