污泥消化前的预处理效果比较
- 海之魂
-
0 次阅读
-
0 次下载
-
2020-03-26 10:08:25
文档简介:
第23卷第3期五邑大学学报(自然科学版)V01.23No.32009年8月JOURNALOFWUYIUNIVERSITY(NaturalScienceEdition)Aug.2009文章编号:1006.7302(2009)03-0008-06污泥消污泥7肖化前的预处理效果比较李冰.李玉瑛(五邑大学化学与环境工程系,广东江门529020)摘要:比较了活性污泥采用碱处理、碱处理与超声处理(20kHz。150W)不同组合预处理的效果.在溶解效果实验中,采用碱预处理,溶解性COD与TCOD的比值可增大到30.1%,再接超声处理,该比值可增大到79.3%;如同时采用碱和超声处理,该比值达到75.9%.在后续BAP实验中,初始活性污泥中挥发性脂肪酸与TCOD的比值小于lO%,采用碱预处理。该比值可增大到30%,再接超声处理,该比值可增大到59%;如同时采用碱和超声处理,该比值达到最大值80%.此外。同时采用碱和超声处理可大大缩短预处理时间.因此。将碱和超声同时用于预处理。能有效增加活性污泥中挥发性脂肪酸的产量、改善后续的消化过程..关键词:碱处理;超声处理;厌氧消化;活性污泥中图分类号:X703.1文献标识码:AAComparisonofthePretreatmentMethodsofWasteActivatedSludgeLIBing,LIYu-ying(DepartmentofChemicalandEnvironmentalEngineering,WuyiUniversity,Jiangmen529020,China)Abstract:Thestudycomparedtheeffectofdifferentmethodsforpretreatingwasteactivatedsludge(WAS),includingdifferentcombinationofalkalitreatment,alkalitreatmentandultrasonictreatment(20kHz,150W).Intheexperiments’testingdissolutioneffectwiththealkalipretreatment,theratioofsolubleCODtothetotalCODcouldbeinereasedto30.1%:ifultrasonictreatmentfollowed。theratiocouldbeincreasedto79.3%;ifalkaliandultrasoundtreatmentwereusedsimultaneously,theratioreached75.9%.InthesubsequentBAPexperiment.theratioofvolatilefattyacidtothetotalCODintheinitialactivatedsludgewaslessthanl0%;byadoptingalkalipretreatment,theratiocouldbeincreasedto30%;ifultrasonictreatmentfollowed。theratiocouldbeincreasedto59%;ifalkalineandultrasonictreatmentswereadoptedsimultaneously.themaximumratioof80%wasreached.Inaddition,thesimultaneoususeofalkalineandultrasonictreatmentscouldsignificantlyshortenthepre-proeessingtime.Therefore,simultaneouslyusingalkaliandultrasoundtreatmentscouldeffectivelyincreasetheproductionofvolatilefattyacidsinactivatedsludgeandimprovethefollow-updigestiveprocess.Keywords:alkalinepretreatment;ultrasonicpretreatmcnt;anaerobicdigestion;wasteac.tivatedsludge城市污水处理的剩余污泥通常采用厌氧消化的方式实现稳定.厌氧消化的过程一般包括水解、收稿日期:2009—02—24基金项目:广东唐自然科学基金资助项目(7300048)作者简介:李冰(1972一)。男,山西太原人,讲师,博士。主要从事废水治理方面的研究,E.mail:wyuchemlb@126.corn.万方数据第23卷第3期李冰等:污泥消化前的预处理效果比较9产酸发酵和产甲烷3个步
评论
发表评论