SMSBR反应器去除焦化废水中的氨氮_耿琰

SMSBR反应器去除焦化废水中的氨氮耿　琰,　周　琪,　屈计宁(同济大学污染控制与资源化研究国家重点实验室,上海200092)　　摘　要:　采用浸没式膜生物反应器(SMSBR)处理焦化废水的试验结果表明:膜的截留作用可使硝化菌在反应器内富集而有利于提高系统的硝化能力,其去除氨氮的最高负荷为0.19kg/(m3·d),出水氨氮<1mg/L(去除率为99%);泥龄长可能使微生物的代谢产物或其他大分子物质积累,从而抑制硝酸盐细菌的活性,导致NO-2积累而有利于短程脱氮的进行,但泥龄过长也会影响亚硝酸盐细菌的活性,从而影响对氨氮的处理效果。整个系统的硝化效果主要受温度、pH值、DO、冲击负荷等因素的影响。　　关键词:　SMSBR;　焦化废水;　硝化;　NO-2积累;　短程脱氮中图分类号:X703　　文献标识码:A　　文章编号:1000-4602(2002)07-0008-04UseofSMSBRforRemovalofAmmoniaNitrogenfromCokeWastewaterGENGYan,　ZHOUQi,　QUJi-ning(StateKeyLabforPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China)　　Abstract:　Asubmergedmembranesequencingbatchbioreactorwasusedtotreatcokewastewa-ter.Longrunningperformanceshowedthatduetothemembraneinterception,thenitrobacterisen-richedinreactorintheinterestofimprovingthenitrificationrate;themaximumammonianitrogenloadingcanbe0.19kg/(m3·d)witheffluentammonianitrogen<1mg/L(removalrate99%).Longsludgeretentiontimemayresultintheaccumulationofmetabolicproductsandhighmolecularmateri-als,andthusinhibitingactivityofnitratebacteria(nitrobacter)andcausingaccumulationofNO-2,whichisbeneficialtotherunningofshort-cutdenitrification.However,toolongretentiontimewillaffecttheactivityofnitritebacteria(nitrosomonas),detrimentaltothetreatmenteffectofammoniani-trogen.Thenitrificationeffectinthewholesystemismainlyinfluencedbytemperature,pH,DO,andshockloading.　　Keywords:　SMSBR;　cokewastewater;　nitrification;　NO-2accumulation;　short-cutdenitrification　　基金项目:教育部科研基金、青年骨干教师基金资助项目　　焦化废水含氮量高且含有大量有毒和难降解物质,若采用传统生物处理工艺