水解酸化-AAO工艺的同步脱氮除磷及污泥减量研究

论述与研究水解酸化/AAO工艺的同步脱氮除磷及污泥减量研究王建龙,彭永臻,刘莹,高永青,高春娣(北京工业大学环境与能源工程学院,北京100022)摘要:针对传统活性污泥法脱氮除磷效率低、污泥产量高的缺点,提出了水解酸化/缺氧)厌氧)好氧(HAAO)污水、污泥一体化处理工艺,研究了该工艺去除COD、氮、磷和污泥减量的效果及其主要影响因素。试验结果表明,在进水COD为286~425mg/L、NH+4-N为36~58mg/L、PO3-4-P为4~12mg/L、总水力停留时间为11.5h及无外加碳源和碱度的条件下,系统对COD、NH+4-N、TN、PO3-4-P的去除率分别可达95%、98%、84%、87%。好氧段的DO浓度、固体停留时间(SRT)和剩余污泥回流比对系统的运行效果有重要影响。将污水和剩余污泥同时进行水解酸化,既可有效地改善污水的可生化性,提高系统对碳源的利用效率,又可实现污泥的减量化,试验条件下系统的污泥减量率达56.5%。基金项目:北京市属市管高等学校人才强教/创新团队0项目(05005013200504);高等学校博士学科点专项科研基金资助项目(200600050002);北京市自然科学基金资助项目(8042004)关键词:脱氮;除磷;污泥减量;水解酸化;AAO工艺中图分类号:X703.1文献标识码:A文章编号:1000-4602(2007)23-0001-05HydrolysisAcidification/AAOProcessforSimultaneousNitrogenandPhosphorusRemovalandExcessActivatedSludgeReductionWANGJian2long,PENGYong2zhen,LIUYing,GAOYong2qing,GAOChun2di(CollegeofEnvironmentalandEnergyEngineering,BeijingUniversityofTechnology,Beijing100022,China)Abstract:Aimedatthedisadvantagesoflownitrogenandphosphorusremovalefficiencyandhighsludgeproductioninconventionalactivatedsludgeprocesses,theintegratedtreatmentprocessofwastewaterandexcesssludgebyhydrolysisacidification/anoxic-anaerobic-aerobic(AAO)processwasputforward.TheefficienciesofCOD,nitrogenandphosphorusremovalandsludgereductionbythisprocessandthemaininfluencingfactorswereinvestigated.TheresultsshowthatwhentheinfluentCOD,NH+4-NandPO3-4-Pare286to425mg/L,36to58mg/Land4to12mg/L,aswellasthehydraulicretentiontimeis11.5handnoexternalcarbonsourceoralkalinityisadded,theremovalratesofCOD,NH+4-N,TNandPO3-4-Pare95%,98%,84%and87%respectively.TheDOconcentration,SRTinaerobicstageandrefluxratioofexcesssludgesignificantlyaffecttheoperationresults.Thesimultane2oushydrolysisofwastewaterandexcessactivatedsludgecanimprovethebiodegradabilityofrawwastewater,theutilizationrateofcarbonsource,andreductionofexcessactivatedsludge.Thereductionratereaches56.5%intheexperimen.t#1#第23卷第23期2007年12月中国给水排水CHINAWATER&WASTEWATERVo.l23No.23Dec.2007Keywords:nitrogenremova;lphosphorusremova;lreductionofexcessactivatedsludge;hydrolysisacidification;anoxic/an