Fenton试剂耦合叶腊石改善厌氧污泥脱水性能

2019年5月第42卷第3期湖南师范大学自然科学学报JournalofNaturalScienceofHunanNormalUniversityVol．42No．3May，2019DOI:10．7612/j．issn．2096－5281．2019．03．011Fenton试剂耦合叶腊石改善厌氧污泥脱水性能台明青*，董丽萍(南阳理工学院土木工程学院，中国南阳473000)摘要利用Fenton试剂耦合叶腊石改善生物乙醇厌氧消化污泥脱水性能。结果表明，最佳污泥脱水条件下，Fenton试剂添加量为55mg/g干污泥，叶腊石为67mg/g干污泥时，此时污泥脱水性能指标污泥比阻(SＲF)和可压缩性系数分别减小到2．7×1012m·kg－1和0．492，与原污泥SＲF12×1012m·kg－1和可压缩性系数1．327相比，SＲF和可压缩系数分别减小77．5%和62．9%;污泥扫描电镜分析表明，经Fenton试剂耦合叶腊石处理的污泥，污泥结构发生明显变化，能形成致密且具有较大孔径的絮体;污泥热重曲线显示，与原污泥相比，耦合调理污泥后脱水起始温度和热重峰明显前移。耦合调理污泥比单独调理污泥脱水效果均具有优势，使用叶腊石可以明显减少Fenton试剂的使用量;此外，该方法处理生物乙醇厌氧消化污泥，不影响污泥后续资源化利用。关键词厌氧消化污泥;Fenton试剂;叶腊石;脱水性能中图分类号X703文献标识码A文章编号2096-5281(2019)03-0075-06OntheImprovedDewaterabilityofAnaerobicDigestedSludgebyCouplingFentonＲeagentwithPyrophylliteTAIMing-qing*，DONGLi-ping(SchoolofCivilandEngineering，NanyangInstituteofTechnology，Nanyang473040，China)AbstractInthiswork，theanaerobicbioethanoldigestedsludgewastreatedbycouplingFentonreagentwithpyrophylliteforimprovingdewateringperformance．Ourresultsshowthattheoptimalworkingconditionwasthefol-lowing:theFentonregentwith55mg/gdrysludgeandthecoupledpyrophyllitewith67mg/gdrysludge．TheSＲFandcompressibilitycoefficientforthetreatedsludgeweredecreasedto2．7×1012m·kg－1and0．492，respectively，whilethoseforuntreatedsludgewere12×1012m·kg－1and1．327，repectively．Comparedwithdewateringperform-ancefortheuntreatedsludge，thedecreasingrateofSＲFandcompressibilitycoefficientwere77．5%and62．9%，respectively．Moreover，scanningelectronmicroscopeimageresultsshowthatafterthetreatmentbyFentonreagentcoupledpyrophyllite，thesludgestructurewassignificantlychangedbyformingadenseflocswithlargerporesize．Afterthetreatment，sludgethermogravimetriccurvesexhibitedthatTGpeakssubstantiallymovedahead．Inaddi-tion，makinguseofFentonreagentcoupledpyrophyllitehasanapparentadvantagesoverconditioningalone，withsignificantimprovenantinthedehydrationperformanceonanaerobicbioethanoldigestedsludge．Finally，theuseofpyrophyllitecanreducetheFentonreagentdosageandtheresourceutilizationofsludgeisnotimpacted．Keywordsanaerobi