城市污水厂污泥快速高效堆肥技术研究

农业环境科学学报2005，24(2)：380—383JournalofAgro—EnvironmentScience城市污水厂污泥快速高效堆肥技术研究李宇庆，陈玲，赵建夫，许民，C．PaulLo(1．同济大学污染控制与资源化研究国家晕点实验室，上海DepartmentofEnvironmentalHealthSciences，TulaneUniversity200092；2．SchoolofPublicHealthandTropicalMedicineNewOrleans，LA)摘要：采用好氧发酵仓式堆肥系统，研究了城市污泥处理过程中温度、含水率、pH、有机质、水溶性有机碳和发芽指数等指标参数的变化规律。结果表明，当物料初始含水率控制在60％左右时．在强制通风量为300L·rain，搅拌频率为5min·8h～～5min·12h。。的工艺条件下，堆肥过程可以实现顺利升温并在55℃以上维持4d，满足杀灭致病菌要求的条件；14d反应周期结束时，物料含水率、水溶性有机碳和有机质含量显著降低，堆肥产品腐熟，卫生学指标达刨了美国EPA污泥产品A类标准；得到的污泥产品成为性质优良的土壤质量调节剂。关键词：污泥；堆肥；调理剂；强制通风中图分类号：X703．1文献标识码：A文章编号：1672—2043(2005)02—0380—04RapidandHigh—-EficiencyCompostingofSewageSludgeLIYu—qing，CHENLing，ZHAOJian—fu，XUMin，C．PaulLo(1．StateKeyofPollutionControlandResourceReuse，Ton~iUniversity，Shanghai200092，China；2．SchoolofPublicHealthandTropicalMedicineDepartmentofEnvironmentalHealthSciences，TulaneUniversity，NewOrleans，LA)Abstract：Agreatdealofmunicipalsludgehasbeenproducingannually，anditscomponentsareverycomplex．Howtostabilizeanddisposethesewagesludgeharmlesslyisbecomingmoreandmoreenormouschallenge．Thechangesofchemicalparameters，suchastemperature，moisture，pH，organicmatter，watersolubleorganiccarbonandgerminationindexduringthecompostingprocesswerestudiedinthepresentinvestigation．Theoptimaltechnologicalconditionsforcompostingwereevaluated．Wehavefoundthatthewatercontentofinitialmaterials，forcedventilationvolumeandmixingfrequencywere60％．300L。rain一‘and5mill。8h～～5rain。12h—I，respectively．Theresultsindicatedthatthetemperaturecouldreach55oCrapidlyandlasted4days，suggestingthattheconditionswereabletofulfilthedemandofsterilizing．Furthermore，thewatercontent，watersolubleorganiccar1)on(WSOC)andorganicmatterreducedsignificantlyduringtheeompostingprocess．Inaddition，thecomposingproductsin14dayswerealmostmature，andcouldmeettheclassAhygienicstandardofUSEPA．Theobtainedcompostingproductscertainlybecomebetterregulatorforsoilfertility．Keywords：sludge；composting；amendment；forcedventilation城市污泥是指城市生活污水、工业废水处理过程中产生的固体废弃物，是城市污水处理厂的经常性产物。自1857年在英国伦敦建立世界上第一个污水处理厂以来，污泥的处理问题一直是市政