天然色素生产废水的生物处理研究_尹炜

第6卷第7期环境污染治理技术与设备Vol.6,No.72005年7月TechniquesandEquipmentforEnvironmentalPollutionControlJul.2005天然色素生产废水的生物处理研究尹炜1,2李培军1程经华3李海波1台培东1(1.中国科学院沈阳应用生态研究所,沈阳110016;2.中国科学院研究生院,北京100039;3.青岛理工大学,青岛266033)摘要天然色素生产废水是一种色度大、难处理的高浓度有机废水,为了寻找该废水的有效处理方法,本文作者采用由升流式厌氧污泥床(UASB)、生物接触氧化、混凝吸附组成的废水处理工艺,对该废水进行了处理试验,结果表明,对稀释4倍的原水,当进水COD为14900mg/L左右时,UASB经过36h的水力停留时间,COD的去除率为58.2%～60.2%、出水色度为180～270倍,SS为119～126mg/L,pH值为6.5～6.8;UASB出水经过24h好氧生物接触氧化反应,COD的去除率超过90%,SS<70mg/L;最终经过Ca(ClO)2氧化和煤渣吸附深度处理,脱色可至无色,出水COD为200mg/L以下。UASB-生物接触氧化-氧化吸附组合处理工艺处理该类天然色素生产废水是可行的。关键词天然色素废水处理UASB生物接触氧化中图分类号X703文献标识码A文章编号1008-9241(2005)07-0053-05AninvestigationofbiologicaltreatmenttechniqueforwastewaterfromthenaturalpigmentproductionYinWei1,2LiPeijun1ChengJinghua3LiHaibo1TaiPeidong1(1.InstituteofAppliedEcology,ChineseAcademyofSciences,Shenyang110016;2.GraduateSchoolofChineseAcademyofSciences,Beijing100039;3.QingdaoTechnologicalUniversity,Qingdao266033)AbstractThewastewaterfromnaturalpigmentprocessingisakindofhighlyconcentratedorganicwastewaterwhichhasdeepcolorandisdifficulttotrea.tInordertofindanefficienttreatmentmethodthewastewatertreatmenttechnologyconsistingofupflowinganaerobicsludgebed(UASB),biologicalcontactoxida-tion,coagulation,andadsorptionwascarriedou.tTheresultsshowthatUASBcaneffectivelyreducepollutantsinthewastewater,inwhichdilutionrateisfourbyfreshwater.WhenhydraulicretentiontimeofUASBis36hoursandCODoftheinfluentwastewaterisabout14900mg/L,removalefficiencyofCODequals58.2%～60.2%,ef-fluentcolourityequals180～270fold,SSequals119～126mg/L,pHequals6.5～6.8.Through24hourshy-draulicretentiontimethebiologicalcontactoxidationreactoreffectivelytreatedtheeffluentfromUASBanditsre-ductionefficiencyofCODisabove90%,SSislessthan70mg/L.ThenthewastewaterisfurtherprocessedbyCa(ClO)2oxidationandcinderadsorptionandthecolorisvanished,CODislessthan200mg/L.ItisfeasibletotreatthewastewaterusingthetechnologyconsistingofUASB,biologicalcontactoxidation,oxidation,andad-sorption.Keywordsnaturalpigment;wastewatertreatment;UASB;biologic