化学解耦联剂对活性污泥工艺中剩余污泥的减量作用_叶芬霞

文章编号:0253-2468(2004)03-0394-06中图分类号:X701.5文献标识码:A化学解耦联剂对活性污泥工艺中剩余污泥的减量作用叶芬霞1,陈英旭2,冯孝善2(1.宁波高等专科学校化工系,宁波315016;2.浙江大学环境工程系,杭州310029)摘要:采用合建式曝气沉淀池模拟装置,将3,3′,4′,5-四氯水杨酰苯胺(TCS)作为代谢解耦联剂添加到完全混合活性污泥工艺中.连续培养试验结果表明,在每g固体悬浮物中含量为0.5mg时,TCS是一种有效的化学解耦联剂,可降低剩余污泥产量约30%.在60d的运行期间,活性污泥工艺的COD去除效率和污泥的沉降性能未见有明显影响,但出水氨氮及总氮浓度升高,污泥的SOUR值相应增加.镜检发现,添加解耦联剂运行60d后,污泥中的丝状菌增多,原生动物和后生动物数量和种类减少,且活性也降低.以上结果表明,可以应用TCS来降低活性污泥工艺中的剩余污泥产量,但对污泥的种群结构有一定的影响.关键词:活性污泥工艺;剩余污泥减量化;质子载体;3,3′,4′,5-四氯水杨酰苯胺(TCS);解耦联剂ReductionofexcesssludgeproductionbychemicaluncouplerinactivatedsludgeprocessYEFenxia1,CHENYingxu2,FENGXiaoshan2(1.DepartmentofChemicalEngineering,NingboCollege,Ningbo315016;2.DepartmentofEnvironmentalEngineering,ZhejiangUniversity,Hangzhou310029)Abstract:3,3′,4′,5-tetrachlorosalicylanilide(TCS),ametabolicuncouplerwasaddedtocompletelymixedactivatedsludgeprocess.ThecontinuoustestshaveconfirmedthatTCSwasaneffectivechemicaluncouplerinreducingtheexcesssludgeproductionby30%whenitsspecif-icconcentrationwashigherthan0.5mg·g-1.ItwasalsorevealedthatCODremovalefficiencyandsludgesettleabilityfromthetreatedandcontrolsamplerswerecomparableandnotsignificantlydifferent,buteffluentnitrogenconcentrationwasaffectedadverselybythepresenceofTCSduringthe60doperation.SuchasludgegrowthreductionwasassociatedwiththeenhancementofmicrobialactivitiesintermsoftheSOUR.ThefilamentousbacteriaweremoreinthesludgefromsystemwithadditionofTCSthanthoseinthecontrolreactorafter60doperation.FewerprotozoaandmetazoangrowinthesludgefromthesystemwiththeadditionofTCSandtheiractivitiesweremuchlowerthancontrolsludge.TheseresultssuggestedthatitmightbepossibletoapplyTCSinactivatedsludgesystemstoreducetheexcesssludgeproductionbutitmightinfluencethepopulationinsludge.Keywords:activatedsludgeprocess;excesssludgereduction;protonphore;3,3′,4′,5-tetrachlorosalicylanilide(TCS);uncoupler收稿日期:2003-04-11;修订日期:2003-11-15基金项目:国家自然科学基金资助项目(50201080)作者简介:叶芬霞(1968—),女,副教授(在职博士),yefenxia@hotmail.com活性污泥法是目前世界上应用最广泛的污水生物处理技术,但它一直存在一个最大的弊端,就是会产生大量的剩余污泥.污泥的处理处置费用较高,成为污水处理厂