强化序批式生物膜反应器脱氮与人工湿地除磷联合工艺初探_卢文健

第一作者:卢文健,男,1986年生,硕士研究生,研究方向为污水处理理论与技术。强化序批式生物膜反应器脱氮与人工湿地除磷联合工艺初探卢文健1李军2韦甦2倪永炯2(1.同济大学环境科学与工程学院,上海200092;2.浙江工业大学建筑工程学院,浙江杭州310014)摘要为解决脱氮除磷对碳源的竞争及不同泥龄需要等问题,提出强化序批式生物膜反应器(SBBR)脱氮与人工湿地除磷联合工艺。通过将SBBR系统分为2格,并采用交替运行的方式(进水和曝气),强化了碳源保存,进一步提高脱氮效率;SBBR系统出水进入栽种菖蒲(AcoruscalamusL.)的人工湿地,利用基质和植物吸附等作用进一步除磷。结果表明:(1)2格交替运行SBBR脱氮效果良好,稳定时出水COD均值为34mg/L,去除率约为93%;出水NH+4-N均值为2.0mg/L,去除率约为94%;出水TN维持在4.5mg/L左右,去除率约为86%;出水TP在2mg/L附近波动,除磷效果并不理想,有时还会出现出水TP高于进水TP的释磷现象。(2)人工湿地除磷效果良好且稳定。当进水TP为0.6～6.7mg/L时,出水TP维持在0.3～0.7mg/L。(3)该联合工艺有良好的脱氮除磷效果。系统出水NH+4-N、TN、TP均值分别为2.0、2.4、0.5mg/L,去除率均值分别为94%、92%、90%。关键词脱氮除磷序批式生物膜反应器储碳人工湿地PrimarystudythecombinedprocessofenhancedSBBRandconstructedwetlandsfornitrogenandphosphorusremovalLUWenjian1,LIJun2,WEISu2,NIYongjiong2.(1.SchoolofEnvironmentalScienceandEngineering,TongjiUni-versity,Shanghai200092;2.SchoolofCivilEngineeringandArchitecture,ZhejiangUniversityofTechnology,HangzhouZhejiang310014)Abstract:Thecharacteristicsofnitrogenandphosphorusremovalwerestudiedinalab-scalecombinedprocesswithenhancedsequencingbiofilmbatchreactor(SBBR)fornitrogenremovalandconstructedwetlandsforphosphorusremoval.ThegoalsofthemodifiedSBBRprocessweretomakefulluseofcarbonsourceandtosolveproblemsexistinthesimultaneousnitrogenandphosphorusremoval,suchasthecompetitiononcarbonsourceanddifferentsludgere-tentiontime.ThismodifiedSBBRoperatedalternatelyintwosimilarpartsofthereactortoenhancethestorageofcar-bonandtoimprovetheefficiencyofsimultaneousnitrificationanddenitrification(SND).ConstructedwetlandswereusedforfurtherPremoval.Theresultsindicatedthat86%ofTNwasremovedinthemodifiedSBBRwiththeeffluentTNwas4.5mg/L;whentheinfluentTPloadingofthewetlandranged0.6-6.7mg/L,theconcentrationofTPinef-fluentwas0.3-0.7mg/L.TheestablishedcombinedprocessachievedagoodresultforNandPremoval;theaverageconcentrationsofNH+4-N,TNandTPineffluentwere2.0,2.4,0.5mg/L,correspondingtotheremovalratesof94%,92%and90%,respectively.Keywords:nitrogenandphosphorusremoval;SBBR;carbonstorage;constructedwetlands常规的序批式生物膜反应器(SBBR)可利