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1、第3卷第1期环境工程学报Vol.3,No.12009年1月ChineseJournalofEnvironmentalEngineeringJan.2009超声与碱预处理低有机质剩余污泥特性分析112345尹军臧立新于海侠李丽萍崔玉琢刘春峰(1.吉林建筑工程学院水污染控制与资源化利用吉林省重点实验室,长春130021;2.长春市海威市政工程设计有限公司,长春130062;3.吉林省审计厅投资处,长春130022;4.江苏明成环保科技有限公司,宜兴214214;51延边大恩建筑工程勘测设计有限公司,延吉133000)摘要以某城市污水处理厂低有机质剩余污泥(VSS/SS为0.42)为对象,
2、通过实验研究了超声与碱(NaOH和CaO)预处理对其特性的影响,分析了加碱和未加碱时污泥上清液中pH值、ORP(氧化还原电位)、SCOD、TP和NH32N等随超声处理时间的变化规律。结果表明,在超声处理30～120min范围内,超声加碱处理可使污泥上清液中ORP明显下降;超声加碱处理可明显提高污泥上清液中的SCOD释放量,且加NaOH比加CaO更为明显;NaOH加超声处理可促进污泥中TP的释放,但CaO加超声处理则与此相反;无论是否加碱,超声处理对污泥上清液中NH32N释放影响较小;超声加碱处理剩余污泥可明显改善污泥絮体,使其更为紧密。关键词剩余污泥超声碱处理中图分类号X705文献标
3、识码A文章编号167329108(2009)0120179204CharacteristicsofwasteactivatedsludgewithlowVSScontentbyultrasonicandalkalinepretreatment112345YinJunZangLixinYuHaixiaLiLipingCuiYuzhuoLiuChunfeng(1.JilinKeyLaboratoryofWaterPollutionControlandResourcesReuse,JilinArchitecturalandCivilEngineeringInstitute,Changchu
4、n130021;2.ChangchunHaiweiCivilWorksDesignCo.Ltd.,Changchun130062;3.AuditOfficeofJilinProvince,Changchun130022;4.JiangsuMingchengEnvriotechLtd.,Yixing214214;51YanbianDa’enArchitecturalEngineeringReconnaissanceandDesignCo.Ltd.,Yanji133000)AbstractThepretreatmentprocessofwasteactivatedsludge(WAS)w
5、ithloworganiccontent(VSS/SS=0.42)fromwastewatertreatmentplant(WWTP)wascarriedoutusingultrasonictreatmentandthecombinationofultrasonicandalkalinetreatment,andthechangesofpH,ORP,SCOD,TP,NH32Ninliquidphasevs.ultra2sonicationtimeweredetermined.TheresultsshowedthattheORPdecreasedgreatlywithintherang
6、eof30minto120minbythecombinationofultrasonicandalkalinetreatment.ThereleaseofSCODwasincreasedbythecombinationtreatmentofultrasonicandalkaline,andtheSCODconcentrationreleasedfromthesamplebyaddingNaOHwashigherthanthatbyaddingCaO.ThepretreatmentofNaOHcombinedultrasonicsenhancedthereleaseofTP,andth
7、ereexistedaslightreleaseofTPfromthesamplewiththeadditionofCaO.TheNH32Ncon2centrationreleasedintotheliquidphasewaslower.Accordingtothescanningelectronmicroscope(SEM)photo2graph,theflocstructureoftreatedsludgewasimprovedandbecametig
