小城镇低负荷SBR工艺运行参数优化研究_刘少武

小城镇低负荷SBR工艺运行参数优化研究_刘少武给水排水Vol.35No.9200939小城镇低负荷SBR工艺运行参数优化研究刘少武周娇张智(重庆大学三峡库区生态环境教育部重点实验室,重庆400045)摘要由于设计进水水质、水量与实际相差较大,重庆市万盛污水处理厂投产之后长期处于低负荷运行状态。在该污水处理厂前期运行过程中,SBR工艺脱氮效率低,能耗较高,处理效果不好。针对此情况,进行了3个月的现场试验,通过调整DO、MLSS、回流比、污泥龄等参数,解决了上述问题,调整后的曝气阶段DO为1～2mg/L、MLSS为3500～4000mg/L,相应的污泥龄约为15d、硝化液回流比约为30%,在冬季运行时,使系统脱氮率从低于10%提高到50%左右,出水水质稳定达标。关键词污水处理厂SBRDOMLSS优化运行Studyontheoperationdataoptimizationofthelow-loadSBRinsmalltownLiuShaowu,ZhouJiao,ZhangZhi(KeyLaboratoryofThreeReserviorRegion'sEco-Enviroment,MinistryofEducation,ChongqingUniversity,Chongqing400045,China)Abstract:Duetothehugedifferenceofdesigninfluentqualityandquantitybetweendesigndataandthepracticaldata,theChongqingWanshengWWTPwasinalow-loadoperationforalongtime.Inthefor-meroperationphaseofthisWWTP,thenitrogenremovalefficiencyofSBRwaslow,thepowerconsump-tionwashigh,andthetreatmenteffectwasnotgood.Afterthreemonthsfieldexperiment,theoperationdatawereoptimized,thesystemnitrogenremovaleffectswereenhanced;byadjustingtheDOinaerationto1～2mg/Lan