常温下改进型EGSB处理城市污水的中试  

PILOT STUDIES ON TREATING MUNICIPAL SEWAGE UNDER NORMAL TEMPERATURE BY MODIFIED EGSB

作　　者：张选军[1] 马秀娟[2] 周雪飞[1] 张亚雷[1] 马利民[2] 赵建夫[2] 

机构地区：[1]同济大学长江水环境教育部重点实验室,上海200092 [2]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境工程》2007年第2期7-9,共3页Environmental Engineering

基　　金：国家"863"计划项目(2004AA649310);国家"十五"科技攻关计划项目(2003BA808A17);上海市科委项目(042312076)资助

摘　　要：通过中试实验,在常温下考察了回流比、水力停留时间和冲击负荷对改进型EGSB处理城市污水效果的影响。实验结果表明,随着回流比的提高,水力停留时间的缩短,改进型EGSB的出水CODfilt是下降的,但当水力停留时间低于2 h时,出水CODCr、CODfilt和SS明显增高。改进型EGSB通过改进回流水系统及布水系统,有效地降低了沉淀区水流上升速度,提高了布水效果,同未改进的EGSB相比,出水CODCr最大下降了26.7 mg/L,CODfilt最大下降了17.8 mg/L,而出水中SS最大下降了66.3 mg/L。当容积负荷突然升高时,对2套反应器都带来冲击,但改进型EGSB比EGSB要容易从冲击中恢复稳定。It is examined that the effects of circumfluence ratio,hydraulic retention time and volume loading rate on treating urban sewage by modified expaned granular sludge bed(EGSB).The results show that the effluent COD_(filt) of modified EGSB is decreased as circumfluence ratio increasing and hydraulic retention time decreasing,however,effluent SS,COD_(filt) and COD_(Cr) are increased evidently when hydraulic retention time is lower than 2 h.As compared with unmodified EGSB,effluent COD_(Cr) of modified EGSB is decreased by 26.7 mg/L and COD_(filt) is decreased by(17.8 mg/L,)while SS is also decreased by 66.3 mg/L.The modified EGSB and unmodified EGSB became unstable when volume loading rate increased abruptly;however,modified EGSB can recover from impact easier than unmodified EGSB.

关 键 词：厌氧膨胀颗粒污泥床 城市污水 容积负荷 冲击 

分 类 号：X703[环境科学与工程—环境工程]