2023年第6期广东化工第50卷总第488期www.gdchem.com·147·餐厨垃圾与剩余污泥共发酵产酸作为反硝化碳源的有效性洪猛(沧州市供水排水集团有限公司，河北沧州061000)[摘要]在河北沧州市采用有效容积为1.5立方米的搅拌釜式反应器，对餐厨垃圾与剩余污泥进行中温(35±2℃)厌氧发酵处理中试研究。考察了共发酵过程可溶性化学需氧量(SCOD)和生化需氧量(BOD)的释放规律以及氮、磷的释放对碳源有效性的影响，同时对餐厨垃圾与剩余污泥共发酵进行经济分析。结果表明：在发酵第10天，SCOD和BOD溶出量达到稳定状态，分别为13320.0mg/L和7510.0mg/L；氨氮在第10天释放的最多，为192.5±2.5mg/L，扣除发酵液中的氨氮对碳源的消耗，共发酵碳源有效性为90.4%；发酵液中释放的磷在第13天达到最高值，为195.2±11.9mg/L，可通过在厌氧发酵液中投加氯化钙直接回收。经济成本分析表明，采用餐厨垃圾与剩余污泥共发酵产酸作为反硝化碳源时，沧州两厂每年可节省约2002.6万元。[关键词]餐厨垃圾；剩余污泥；厌氧共发酵；碳源；有效性[中图分类号]TQ[文献标识码]A[文章编号]1007-1865(2023)06-0147-03AvailabilityofAcidfromCo-fermentationFoodWasteandWasteActivatedSludgeasCarbonSourceforDenitrificationHongMeng(CangzhouWaterSupplyandDrainageGroupCompanyLimited,Cangzhou061000,China)Abstract:Apilotstudyonanaerobicco-fermentationoffoodwasteandwasteactivatedsludgeatmediumtemperature(35±2℃)wascarriedoutinastirredtankreactorwithaneffectivevolumeof1.5m3inCangzhou,HebeiProvince.Thereleaseofsolublechemicaloxygendemand(SCOD)andbiochemicaloxygendemand(BOD)andtheeffectofnitrogenandphosphorusoncarbonsourceavailabilitywereinvestigated.Atthesametime,theeconomicanalysisoftheco-fermentationoffoodwasteandwasteactivatedsludgewascarriedout.Theresultsshowedthatafter10daysofanaerobicco-fermentation,theamountsofSCODandBODreachedastablestateof13320.0mg/Land7510.0mg/L,respectively.ThemaximumreleaseofNH4+-Nwas192.5±2.5mg/Lonthe10thday,whichreducedthecarbonsourceavailableto90.4%.Thereleasedphosphorusfromtheco-fermentationreachedthehighestvalueonthe13thday,whichwas195.2±11.9mg/L.Itcanbedirectlyrecoveredbyaddingcalciumchloridetotheanaerobicco-fermentationliquid.Theeconomiccostanalysisshowedthatth...
