外加铁盐对污泥高温好氧堆肥效果的影响

净水技术2017,36(11):33-39WaterPurificationTechnology梁佳芸，寿宗奇，袁海平，等•外加铁盐对污泥高温好氧堆肥效果的影响[J]•净水技术，2017,6(11):33-39.LiangJiayun,ShouZongqi,YuanHaiping,etal.Effectofadditionaldosageofferricsaltsonaerobicthermophiliccompostingofsewagesludge[J].WaterPurificationTechnology,2017，36(11):33—39.外加铁盐对污泥高温好氧堆肥效果的影响梁佳芸，寿宗奇，袁海平，朱南文(上海交通大学环境科学与工程学院，上海200240)摘要摘要针对污泥堆肥初期挥发性脂肪酸（VFA)积累会对微生物活性产生的抑制问题，提出投加铁盐以解除抑制，加快堆肥反应进程。研究结果表明,投加硝酸铁和氯化铁对污泥高温好氧堆肥具有促进作用，其中，投加硝酸铁处理的污泥挥发性固体(VS)去除率达到28.0%,比对照提高28.4%，升温速率、最高温度均高于对照，总挥发性脂肪酸（TVFA)浓度明显降低，始终低于15g/kgDS(干基）；堆体的水溶性COD(SCOD)和水溶性铵态氮（NH:-r)浓度均低于对照。投加氯化铁处理的污泥VS去除率达到26.0%,比对照提高19.3%。投加柠檬酸铁和硫酸铁处理的污泥VS去除率、升温速率、最高温度无明显提高或低于对照，堆肥过程受抑制。关键词关键词高温好氧堆肥污泥挥发性脂肪酸挥发性固体铁盐中图分类号：中图分类号：X705文献标识码：文献标识码：A文章编号：文章编号：1009-0177(2017)11-0033-07DOI：10.15890/j.cnki.jsjs.2017.11.006EffectofAdditionalDosageofFerricSaltsonAerobicThermophilicCompostingofSewageSludgeLiangJiayun,ShouZongqi,YuanHaiping,ZhuNanwen{SchoolofEnvironmentalScienceandEngineering，ShanghaiJiaoTongUniversity，Shanghai200240,China)AbstractSinceexcessivevolatilefattyacid(VFA)inhibitsmicrobialactivityatthebeginningofaerobicthermophiliccompostingofsewagesludge,ferricsaltswereemployedinthisstudytodisinhibitexcessiveVFAandacceleratetheprocessofcomposting.Resultsshowedthatbothferricnitrateandferricchloridewereeffective.Thereinto，theremovalefficiencyofsludgevolatilesolid(VS)byferricnitratetreatmentachieved28.0%，increasedby28.4%comparedtothecontrast.Theadditionofferricnitratealsoresultedinbettertemperaturerisingrateandmaximumtemperaturethanthoseofthecontrast.Additionally,concentrationoftotalvolatilefattyacid(TVFA)waslessthan15g/kgDS(DrySludge)duringthecompostingprocess，whichwassignificantlydecreased.LowersolubleCOD(SCOD)andsolubleNH4-Nwereobtainedbythetreatment.Furthermore，theremovalefficiencyofVSbyferricchloridetreatmentachieved26.0%，increasedby19.3%comparedtothecontrast.However,theVSremoval，temperaturerisingrateandmaximumtemperaturebyferriccitrateandferricsulfatetreatmentexhibitednoobviousincrease，orevenlowerthanthecontrast，in