分段进水生物接触氧化工艺处理河道污水的试验研究_李璐

分段进水生物接触氧化工艺处理河道污水的试验研究李璐,温东辉＊,张辉,谢曙光(北京大学环境科学与工程学院,北京100871)摘要:选择滇池入湖污染负荷最高的大清河为对象,以分段进水生物接触氧化(SFBC)工艺对河道污水开展了分流处理的试验研究,已完成冬季枯水期、春季枯水期及夏季丰水期3个时期的研究.结果表明,SFBC工艺对水质变化具有很好的适应性,调整各时期的运行参数,可以使COD及TP的去除率分别稳定在50%和40%左右,但TN的去除受水温及溶解氧等的影响很大,在逐渐稳定后去除率可达到20%左右.接种活性污泥可以加快装置的启动,但总体去除效果不及来水自然驯化的污泥,随着运行时间延长以及来水带入河道底泥的影响,有无接种污泥在处理效率上的差别逐渐消失.关键词:分段进水生物接触氧化(SFBC)工艺;河道污水;去除率;氮转化;滇池中图分类号:X522文献标识码:A文章编号:0250-3301(2008)08-2227-08收稿日期:2007-08-13;修订日期:2007-09-17基金项目:国家高技术研究发展计划(863)项目(2005AA601010-03)作者简介:李璐(1983～),男,硕士研究生,主要研究方向为水污染治理与生物修复,E-mail:lilu1983@163.com＊通讯联系人,E-mail:dhwen@pku.edu.cnPilotExperimentontheTreatmentoftheRiverWastewaterbyaStep-FeedBiologicalContactProcessLILu,WENDong-hui,ZHANGHui,XIEShu-guang(CollegeofEnvironmentalScienceandEngineering,PekingUniversity,Beijing100871,China)Abstract:IntheDianchiLakewatershed,theDaqingheRiverwiththehighestloadofpollutionwaschosenasthetreatmenttarget,anewstep-feedbiologicalcontact(SFBC)processwasstudiedtotreatthewastewaterfromtheriverway.Thepilotexperimentwascarriedoutthroughawinterdryseason,aspringdryseasonandasummerrainyseason.TheresultsshowedthattheSFBCprocesswaswell-adaptedtothevariationoftheriverwastewaterqualities.Byadjustingtheprocessparametersindifferentseasons,theremovalratesofCODandTPcouldbestableatabout50%and40%respectively;however,theremovalrateofTNwasinfluencedbythewatertemperatureandDOgreatly,andkeptatabout20%whentheprocesswenttoitsstabilization.Seedingwithactivatedsludgecouldacceleratethestart-upoftheequipment,butthewholetreatmentefficiencywasnotasgoodasthatoftheequipmentwithoutseedingbutdomesticatingthemicroorganismintheriverwastewater.However,alongwiththerunningoftheSFBCprocessaswellastheimpactoftheinfluentsedimentfromtheriver,thedifferenceofthetreatmentefficienciesbetweenthetwoequipmentsofwhetherornotseedingwithactivatedsludgewoulddisappeargradually.Keywords:step-feedbiologicalcontact(SFBC)process;riverwastewater;removalrate;nitrogentransformation;theDianchiLake我国工业化与城市化的快速进程使大量河流、湖泊等淡水体系受到不同程度的污染,水体中有机污染物、氮、磷等营养物质不断增加