温度对改进型EGSB处理城镇污水的影响  

Effect of Temperature on Municipal Wastewater Treatment in Modified Expanded Granular Sludge Bed

作　　者：马利民[1] 唐燕萍[1] 马秀娟[1] 张亚雷[1] 

机构地区：[1]同济大学污染控制与资源化国家重点实验室,上海200092

出　　处：《同济大学学报（自然科学版）》2009年第6期796-800,共5页Journal of Tongji University:Natural Science

基　　金：科技部中俄科技合作计划项目(2007DFR90050);国家"十一五"科技支撑计划项目(2006BAJ08B01;2008BAD98B04)

摘　　要：利用配水使用改进型厌氧膨胀颗粒污泥床(EGSB)反应器研究了温度对处理城镇污水效果的影响.结果表明:改进型EGSB反应器在低温时(7~13℃)能正常启动,启动后反应器中pH值保持在6.2~7.6之间,略高于高温(大于25℃)阶段的6.0~7.4之间;在高温下反应器的启动比在低温时有更好的化学需氧量(COD)去除效果,启动时间也更短;低温启动后反应器出水的碱度为400 mg.L-1、挥发性脂肪酸(VFA)值为120 mg.L-1高温时出水的碱度为600mg.L-1、挥发性脂肪酸(VFA)值为180 mg.L-1.稳定运行阶段,随着温度的升高,改进型EGSB系统COD的去除率从逐步升高.低温时,COD的去除率均值为63.7%,高温时,COD的去除率均值为87.0%.温度和反应器内的氧化还原电位(ORP)呈明显负相关,反应器温度变化范围为7~29℃时,ORP变化范围为-410mV^-520mV.A study was made of the effect of temperature on municipal wastewater treament in modified expanded granular sludge bed （EGSB）. The result shows that the pH of water in the reactor remains to be 6.2 - 7.6 after stability at lower temperature（7-13℃）, and 6.0-7.4 at higher temperature （〉25℃） during starting up. The reactor is easier to start up at higher temperature with higher chemical oxygen demand （COD） removal efficiency. The alkalinity of water in the reactor is 400mg·L^-1 during the period of lower temperature, and 600mg·L^-1 in the period of higher temperature. The concentrations of volatile fatty acid（VFA） of outlet （180 mg·L^-1） are greater at higher temperature than those at lower temperature（120 mg·L^-1 ）. The COD removal efficiency increases from 63.7% to 87.0%with the increasing of temperture in the reactor from an average temperature less than 15 ℃ to 25℃ or above. A negative relation is found between the oxidative redox potential （ORP） and the removal efficiency of COD in the reactor. ORP changes from - 410 mV to - 520 mV when the temperature varies from 7 to 29 ℃.

关 键 词：温度 城市污水 改进型厌氧膨胀颗粒污泥床 处理效果 

分 类 号：X703[环境科学与工程—环境工程]