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《非离子表面活性剂对污泥调理脱水效果的影响_侯海攀.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第33卷第6期环境科学Vol.33,No.62012年6月ENVIRONMENTALSCIENCEJun.,2012非离子表面活性剂对污泥调理脱水效果的影响111111121*侯海攀,濮文虹,时亚飞,于文华,樊明明,刘欢,杨昌柱,李野,杨家宽(1.华中科技大学环境科学与工程学院,武汉430074;2.宇星科技发展(深圳)有限公司,深圳518057)摘要:现有污泥脱水技术仅使污泥含水率降到80%左右,难以满足日益严格的污泥处置要求.以污泥比阻(SRF)、脱水率为考察指标,比较了两大类非离子型表面活性剂(辛基酚聚氧乙烯醚OPEO型和烷基糖苷APG)对剩
2、余污泥的脱水效果,并对原泥及调理后污泥进行了显微观察.结果表明,非离子表面活性剂可使污泥絮体粒径变小,不规则程度降低,改善了污泥的脱水性能,而且烷基糖苷APG脱水效果优于OPEO型.APG投加量为0.05%干固体时,污泥比阻即可降低到原泥的42%,脱水率可达到93%.以烷基糖苷APG为调理剂进行板框脱水实验,结果表明,当APG投加量为0.05%干固体时,脱水泥饼含水率比原泥脱水泥饼含水率低约10%,脱水率可达到97%.本研究为APG应用于污泥脱水,改善污泥脱水性能提供一些参考.关键词:非离子型表面活性剂;污泥脱水;污泥比阻;脱水率;含水率中图分类号
3、:X705文献标识码:A文章编号:0250-3301(2012)06-1930-06InfluenceofNon-ionicSurfactantsonSludgeDewaterability1111111HOUHai-pan,PUWen-hong,SHIYa-fei,YUWen-hua,FANMing-ming,LIUHuan,YANGChang-zhu,21LIYe,YANGJia-kuan(1.SchoolofEnvironmentalScienceandTechnology,HuazhongUniversityofScience&Techno
4、logy,Wuhan430074,China;2.UniverstarScience&Technology(Shenzhen)Co.Ltd.,Shenzhen518057,China)Abstract:Thewatercontentofdewateredsludgecakedecreasestoabout80%bycurrentsludgedewateringtechnologies,whichhardlysatisfiesthestricterstandardsofsludgedisposal.Inordertoevaluatetheeffect
5、sofnon-ionicsurfactantsonsludgedewaterability,twokindsofnon-ionicsurfactants(OPEOandAPG)werestudiedbyusingtwoevaluationindexes,i.e.,specificresistancetofiltration(SRF)anddewateringefficiency.Moreover,morphologiesofconditionedsewagesludgeandrawsludgewerecomparativelyinvestigate
6、d.Resultsshowedthatnon-ionicsurfactantscandecreasetheparticlesizeofsewagesludgeflocandgeneratemorehomogenousandregularshape,andthenimprovethedewateringefficiency.APGhasbettereffectonsewagesludgedewateringthanOPEO.SRFofconditionedsludgewithAPGdosageof0.05%DSdecreasedto42%ofSRFo
7、frawsludge,anditsdewateringefficiencywasashighas93%.Plate-framepressurefilterexperimentdemonstratedthat,thewatercontentofdewateredcakeconditionedwithAPGdosageof0.05%DSwaslowerbyabout10%thanthatofdewateredcakewithoutAPG,anditsdewateringefficiencyreached97%.Therefore,thisresearc
8、hprovidessomereferencefortheapplicationofAPGinsludgedewaterin
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