阶段时间对CMICAO工艺低温运行特性的影响  

Effect of Phase-operating Time on CMICAO Process Performance at Low Temperature

作　　者：朱光灿[1,2] 雷晓芬[1] 许卓 吕锡武[1,2] 

机构地区：[1]东南大学能源与环境学院,南京210096 [2]东南大学无锡太湖水环境工程研究中心,江苏无锡214135 [3]中蓝连海设计研究院,江苏连云港222004

出　　处：《土木建筑与环境工程》2013年第2期118-123,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：江苏省自然科学基金(BK2011142);江苏省科技支撑计划项目(BE2008667);东南大学自然科学基金预研项目(KJ2009347)

摘　　要：研究了低温下多点交替进水阶式A2/O(CMICAO)工艺阶段运行时间对污染物去除率的影响,探讨了DO、ORP以及pH状态参数与污染物去除率之间的关系。结果表明,水温8～10℃,泥龄13d,水力停留时间16h,污泥浓度2 680～3 560mg/L,污泥回流比30%,阶段1至6的运行时间为3、2.5、2、3、2.5、2h时,工艺出水TN、氨氮、NO3--N和TP浓度的平均值分别为10.1、1.1、7.4和0.8mg/L。硝化反应结束时,pH由下降转为上升,ORP上升趋于平缓,DO上升趋缓;反硝化结束时,ORP曲线明显跌落,pH由上升趋于平缓并略有下降;释磷结束后ORP曲线由下降趋于平缓。降低前好氧池DO浓度,有助于同步硝化反硝化作用的发生,从而提高脱氮效率,节省能耗。The effect of phase operating time on pollutants removal efficiencies in CMICAO process was investigated at low temperature,and the relationship between DO,ORP,pH and the removal efficiencies was discussed.At 8~10 ℃,when SRT was 13 d,HRT was 16 h,sludge concentration was 2 680~3 560 mg/L and sludge return ratio was 30%,the optimal operating time of six phases were 3,2.5,2,3,2.5 and 2 h,and the concentrations of TN,ammonia,NO3——N and TP in the effluent were lower than 10.1,1.1,7.4 and 0.8 mg/L,respectively.When nitrification finished,pH began to rise from the fall and ORP and DO rose to flatten.When denitrification ended,ORP dropped significantly and pH rose to flatten.ORP flattened when phosphorus release finished.The DO reduction in the ex-aerobic tank contributed to SND,which improves nitrogen removal efficiency and saves energy accordingly.

关 键 词：多点交替进水阶式A2 O(CMICAO)工艺 硝化 反硝化 污水处理 

分 类 号：X703.1[环境科学与工程—环境工程]