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1、第29卷第6期环境科学Vol.29,No.62008年6月Jun.,2008ENVIRONMENTALSCIENCE高固体污泥微波热水解特性变化1131233乔玮,王伟,荀锐,周刚,万晓,夏洲(11清华大学环境科学与工程系,北京100084;21北京师范大学环境学院,北京100875;31健坤伟华新能源科技有限公司,北京100085)摘要:考察浓度7%、9%和13%的高固体污泥微波热水解特性,通过生化产甲烷潜能(BMP)实验,分析热处理污泥厌氧消化性能的变化.结果表明,微波加热升温速度快,污泥中悬浮性挥发固体(VSS)和悬浮固体(SS)溶解,液相COD、TOC、氨氮、TN和TP浓度增大,pH
2、值降低.水解效率受污泥浓度影响显著,浓度13%的污泥VSS和SS溶解率低于7%和9%的污泥.170℃热水解5min,9%污泥的VSS和SS溶解率分别为23%和18%,SCOD浓度为41gPL,TOC和氨氮浓度达到30gPL和1gPL.热水解污泥厌氧消化性能提高,9%污泥的产气量在170℃、5min和10min比未处理污泥增加27%和3018%.热水解时间对提高消化性能影响不大,热水解由5min到10min,120℃、150℃和170℃的产气量分别增加4%、316%和517%.关键词:微波热水解;高固体污泥;厌氧消化中图分类号:X705文献标识码:A文章编号:025023301(2008)06
3、21611205CharacteristicsofHighSolidContentSludgewithMicrowaveIrradiation111233QIAOWei,WANGWei,XUNRui,ZHOUGang,WANXiao,XIAZhou(1.DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China;2.SchoolofEnvironmentalScience,BeijingNormalUniversity,Beijing100875,China;3.J&KChinaC
4、leaningEnergyTechnologyCo.Ltd.,Beijing100085,China)Abstract:Thispaperfocusonchangesofhighsolidcontentsludge(7%,9%and13%)hydrolysiswithmicrowaveirradiationalsoanaerobicbiodegradationoftreatedsludgewastestedbybiochemicalmethanepotential(BMP)procedure.Resultsshowedthatmicrowaveirradiationprovidedarapi
5、dtemperatureincreasing.Hydrolysisacceleratedthesolubilizationofvolatilesuspendedsolid(VSS)andsuspendedsolid(SS).+COD,TOC,NH42N,TN,andTPconcentrationofliquorsludgeincreased,whilepHdecreased.Sludgesolidcontentwasfoundtobethemostinfluentialparameter.VSSandSSdissolvingratioofsludgewith13%solidcontentwe
6、relowerthansludgewith7%and9%solidcontent.23%ofVSSand18%ofSSdissolvedfor9%sludgeat170℃with5min,SCODofliquorwas41gPL,andconcentrationofTOC+andNH42Nwere30gPLand1gPLrespectively.Biodegradationoftreatedsludgeimproved.Methaneproductionof9%sludgeat170℃with5minand10minwere27%and3018%higherthanthatofuntreat
7、edsludge.Hydrolysistimeincreasingfrom5minto10minbroughtanimprovementof4%,316%and517%methaneproductionat120℃,150℃and170℃.Keywords:microwaveirradiation;highsolidcontentsludge;anaerobicbiodegradability厌氧消化是污泥稳
