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1、第38卷第11期北京工業(yè)大學(xué)學(xué)報(bào)Vo1.38No.1l2012年11月JOURNALOFBEIJINGUNIVERSITYOFTECHNOLOGYNOV.2Ol2多點(diǎn)進(jìn)水多級(jí)A/O工藝脫氮及顫蚓生長(zhǎng)特性李軍,李澤兵,孔倩,姜鳴,趙白航,馬家軒,王曉毅(1.北京工業(yè)大學(xué)建筑工程學(xué)院,北京100124;2.河南省化工研究所有限責(zé)任公司,鄭州450052)摘要:以城市污水為處理對(duì)象,開展多點(diǎn)進(jìn)水一多級(jí)A/O工藝高效脫氮技術(shù)研究,并深入考察研究了系統(tǒng)中顫蚓的生長(zhǎng)特性及其對(duì)系統(tǒng)脫氮能力和污泥特性的影響.經(jīng)過(guò)120d的強(qiáng)化運(yùn)行,系統(tǒng)表現(xiàn)出良好的處
2、理效果,COD平均去除率為84%,氨氮去除率接近100%,TN去除率穩(wěn)定在70%~80%,這3個(gè)指標(biāo)可滿足城鎮(zhèn)污水處理廠污染物排放標(biāo)準(zhǔn)(GB18918-2002)一級(jí)A標(biāo)準(zhǔn)的要求.經(jīng)長(zhǎng)期考察發(fā)現(xiàn),低DO質(zhì)量濃度不利于顫蚓生長(zhǎng),成蚓對(duì)兼性空間的需求較幼蚓高.顫蚓的生長(zhǎng)未對(duì)系統(tǒng)處理效果產(chǎn)生影響,還促進(jìn)了系統(tǒng)污泥的沉降性,并有一定的污泥減量效果.關(guān)鍵詞:多點(diǎn)進(jìn)水一多級(jí)AO工藝;顫蚓;硝化反硝化;污泥指數(shù)(SVI)中圖分類號(hào):X703文獻(xiàn)標(biāo)志碼:A文章編號(hào):0254—0037(2012)11—1738—0007Characteristicso
3、fNitrogenRemovalandTubificidaeGrowthintheStepFeeding—MultistageA/OProcessLIJun,LIZe—bing,KONGQian,JIANGMing,ZHAOBai—hang,MAJia—xuan,WANGXiao—yi(1.CollegeofCivilEngineeringandArchitecture,BeijingUniversityofTechnology,Beijing100124,China;2.HenanChemicalIndustryResearchIn
4、stituteCo.Ltd,Zhengzhou450052,China)Abstract:Takingmunicipalwastewaterastreatmentobject,astepfeeding—multistageA/Oprocessfornitrogenremovalwasconducted.Furthermore,theaimofthispaperwastoresearchgrowthcharacteristicofTubificidae,anditsaffectiontonitrogenremovalandsludgee
5、haractensties.After120daysoperation,agoodperformancewasachievedinthesystem.TheCOD、NH4+一NandTNremovaleficiencywas84%、100%and70%一80%.respectively.ThreeaboveindexescouldmeetStandardAofLevelli”“DischargeStandardofPollutantsforMunicipalWastewater”(GB18918—2002).Itwasfoundtha
6、tlowDOconcentrationwasunfitfortubificidaegrowth,andthematureTubificidaerequiredmorefaeuhativespacethanthelarvaesinthelong—timeoperatingprocess.Tubificidaegrowthdidn’taffecttheremovalabilityofthesystem.And,itcouldincreasethesludgesedimentationperformanceandpromotedsludge
7、reductioninacertaindegree.Keywords:stepfeeding—multistageA/Oprocess;Tubificidae;nitrificationanddenitrifieation;sludgevolumeindex(SVI)城市污水處理在解決生物脫氮過(guò)程中面臨的碳等工藝㈩,以原水中的有機(jī)物作為反硝化碳源.但源問(wèn)題時(shí),較多地采用了前置反硝化的A/O、A0是,由于前置反硝化,硝化液回流時(shí)需大量的動(dòng)力消收稿日期:2O11—03—31.基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目(51078008);國(guó)家重大
8、水專項(xiàng)資助項(xiàng)目(2009ZX07210—002—003.2);北京市自然科學(xué)基金資助項(xiàng)目(8092007);北京市教委重點(diǎn)基金資助項(xiàng)目(KZ201110005008).作者簡(jiǎn)介:李軍(1964一),男,教授,博士生導(dǎo)師,