污泥发酵同步消化液旁侧脱氮_张树军

中国环境科学2011,31(1)：19~24ChinaEnvironmentalScience污泥发酵同步消化液旁侧脱氮张树军1,2,韩晓宇1,张亮3,孟春霖1,常江1,甘一萍1,彭永臻2*(1.北京城市排水集团有限责任公司,北京100038；2.北京工业大学水质科学与水环境恢复工程重点实验室,北京100124；3.哈尔工业大学市政环境工程学院,黑龙江哈尔滨150090)摘要：污泥消化液为高氨氮、低C/N比、低碱度的废水,用传统生物脱氮方法处理消化液,存在碳源和碱度不足的双重障碍.本实验在“A/O+SIFEDEN”组合系统中,首先在A/O反应器中实现消化液短程硝化,其出水与初沉污泥在SIFEDEN中同步实现消化液短程脱氮和污泥减量,消化液的TN去除率可达87%,MLVSS去除率为49%左右.考察了SIFEDEN反应器中污泥发酵和污水反硝化的互惠关系、pH值的变化规律等.该系统出水回流到污水厂主流区,不会降低进水C/N,污水厂的脱氮除磷效率得以提高.关键词：消化液；脱氮；A/O+SIFEDEN；污泥发酵同步反硝化；污泥减量中图分类号：X703文献标识码：A文章编号：1000-6923(2011)01-0019-06Sidingnitrogenremovalfromdigestionliquidbysimultaneoussludgefermentationandwastewaterdenitrification.ZHANGShu-jun1,2,HANXiao-yu1,ZHANGLiang3,MENGChun-lin1,CHANGJiang1,GANYi-ping1,PENGYong-zhen2*(1.BeijingDrainageGroupCorporationLimited,Beijing100038,China；2.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China；3.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China).ChinaEnvironmentalScience,2011,31(1)：19~24Abstract：Externalcarbonsourceandalkalinityneedtobesuppliedfornitrogenremovalfromdigestionliquidwithhighconcentrationsofammonia,lowC/Nratioandlowconcentrationsofalkalinitybytraditionalnitrogenremovaltechnologies.Inthisinvestigation,anovelsystemconsistedofanA/OreactorandSIFEDEN(SImultaneousFErmentationandDENitrification)reactorwasusedfornitrogenremovalfromdigestionliquid.Firstly,nitritationofdigestionliquidwasfinishedintheA/Oreactor.Secondly,nitriteandnitrateineffluentoftheA/OreactorwereremovedintheSIFEDENreactorbyusingprimarysludgehydrolyzedandfermentedascarbonsources.Totalnitrogenremovalefficiencyofdigestionliquidwasabout87%andvolatilesuspendedsolid(VSS)ofprimarysludgewasdecreasedbyabout49%.ThereciprocalrelationbetweensludgefermentationanddigestionliquiddenitrificationandvariationofpHintheSIFEDENreactorwereinvestigated.Wheneffluentofthesystemwasreflowedintomainstreamofwastewatertreatmentplantafteraccomplishinghighlyeffectivesidingnitrogenremo