低DO浓度下A/O型SBR工艺除污性能研究  

Pollutant Removal Performance of A/O-type SBR Process under Low DO

作　　者：左金龙[1,2] 李俊生[1] 黄丽坤[1,2] 车春波[1] 吴昌永[2] 

机构地区：[1]哈尔滨商业大学食品工程学院省高校食品科学与工程重点实验室,黑龙江哈尔滨150076 [2]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《中国给水排水》2011年第15期99-102,共4页China Water & Wastewater

基　　金：黑龙江省自然科学基金资助项目(E200931);黑龙江省博士后研究人员科研启动基金资助项目

摘　　要：为了研究低DO浓度下对污染物的去除效果,采用SBR反应器,通过缺氧/好氧(A/O)的运行方式,考察了好氧段DO的平均值为1 mg/L时系统的除污效果,同时与好氧段DO平均值为2 mg/L时系统的除污效果进行了对比。结果表明:在低DO浓度下,SBR工艺出水COD<40mg/L,系统对COD的去除率在90%左右,对COD的去除效果略高于正常DO值条件下的;低DO浓度下,系统对氨氮的去除率在90%左右,对氨氮的去除效果低于正常DO值条件下的,但出水氨氮仍可保持在5 mg/L左右;系统的硝化反应速度较慢,反应结束时亚硝酸盐氮积累率为37%;NO x--N生成速率与NH 4+-N氧化速率之比与DO浓度呈较好的线性关系;DO浓度对正磷酸盐的去除效果影响较小,系统对正磷酸盐的去除率>90%,出水正磷酸盐浓度<0.5 mg/L;出水非常清澈,镜检可见丝状菌。In order to study the pollutant removal efficiency under low DO, the pollutant removal efficiency at mean DO value of t mg/L in aerobic zone of sequencing batch reactor （SBR） operated in auoxic/aerobic （A/O） mode was investigated and compared with that at mean DO value of 2 mg/L. The results show that under low DO, the effluent COD is less than 40 mg/L, the COD removal rate can reach about 90% , and the COD remova1 efficiency is slightly more than that under normal DO. The ammonia nitrogen removal rate can reach about 90% , the ammonia nitrogen removal efficiency is less than that un- der normal DO, but the effluent ammonia nitrogen is about 5 mg/L. The nitrite nitrogen accumulation rate is 37% at the end of the reaction with lower tween the ratio of NOx- - N formalion rate to NH4 nitrification rate. There is a good liner relationship be- - N oxidation rate and DO concentration. The DO con- eentration has little effect on the orthophosphate removal efficiency, the orthophosphate removal rate is more than 90% , and the effluenl orthophosphate concentration is less than 0.5 mg/L. The effluent is clear, and filamentous bacteria can be seen.

关 键 词：低DO浓度 SBR工艺 缺氧/好氧 除污性能 

分 类 号：X703[环境科学与工程—环境工程]