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1、第30卷第l期中國(guó)給水排水V01.30No.12014年1月CHINAWATER&WASTEWATERJan.2014生物瀝浸對(duì)城市污泥脫水及其重金屬去除的影響周俊,劉奮武,崔春紅,畢文龍,周立祥(1.南京農(nóng)業(yè)大學(xué)資源與環(huán)境科學(xué)學(xué)院,江蘇南京210095;2.南京工業(yè)大學(xué)生物與制藥工程學(xué)院,江蘇南京211816)摘要:利用瀝浸微生物對(duì)濃縮污泥與添加聚丙烯酰胺(PAM)的脫水污泥進(jìn)行生物瀝浸處理,同時(shí)采用廂式壓濾機(jī)在0.35MPa的壓力條件下,對(duì)生物瀝浸前后的污泥進(jìn)行脫水。結(jié)果表明.經(jīng)過(guò)生物瀝浸處理,濃縮污泥與稀釋后的脫水污泥的CST值可分別降至l1.
2、8、14.6S;瀝浸結(jié)束后靜置24h,上清液所占比例分別從原來(lái)的12.5%、24%升至31%、42%,兩種污泥中zn的溶出率分別為66.65%、59.13%,Cu的溶出率分別為13.31%、23.55%。對(duì)濃縮污泥直接進(jìn)行壓濾脫水,泥餅含水率高達(dá)75%;加PAM調(diào)理后再脫水,泥餅含水率達(dá)68%;而經(jīng)生物瀝浸后再脫水,泥餅含水率可降至58%??梢姡谙嗤撍畻l件下,生物瀝浸法對(duì)污泥的調(diào)理作用要優(yōu)于PAM關(guān)鍵詞:濃縮污泥;脫水污泥;生物瀝浸;脫水性能;聚丙烯酰胺;重金屬中圖分類號(hào):X703文獻(xiàn)標(biāo)識(shí)碼:C文章編號(hào):1000—4602(2014)0l一008
3、6—04EfectofBioleachingonDewaterabilityofSewageSludgeandRemovalofHeavyMetalsZHOUJun’,LIUFen—wu,CUIChun—hong,BIWen—long,ZHOULi—xiang(1.CollegeofResourcesandEnvironmentalSciences,NanjingAgriculturalUniversity,Nanjing210095,Chirut;2.FacultyofBiotechnologyandPharmaceuticalEngineerin
4、g,NanjingUniversity’Technology,Nanjing211816,China)Abstract:BioleachingexperimentsofthickenedanddewateredsludgetreatedwithPAMwereper·formedbyleachingcompoundmicroorganisms.Meanwhile,thetwokindsofsludgeweredewateredbythechamberfilterpresswith0.35MPabeforeandafterbioleaching.Ther
5、esultsshowedthatthecapillarysuctiontimes(CST)ofthethickenedsludgeanddewateredsludgetreatedwithPAMweredecreasedto11.8sand14.6S,respectively.After24hsettlement.thesupematantsofthebioleachedthickenedsludgeanddewateredsludgetreatedwithPAMaccountedfor31%and42%ofthetotalvolumes.con—p
6、aredtotheinitial12.5%and24%beforebioleaching.respectively.Meanwhile.theremovalratesofZninthebioleachedthickenedsludgeanddewateredsludgetreatedwithPAMwere66.65%and59.13%,andtheremovalratesofCuwere13.31%and23.55%,respectively.Themoisturecontentofthedewateredcakesofthickenedsludge
7、,PAMtreatedsludgeandbioleachedsludgewere75%,68%and58%,respectively.Obviously,thebioleachingmethodwasbetterthanPAMapplicationunderthesamedewateringcondition.基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目(21177060、21277071);國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863)項(xiàng)目(2012AA063501);江蘇省青年科學(xué)基金資助項(xiàng)目(BK20130931);江蘇省高校自然科學(xué)研究面上項(xiàng)目(13KJB61000
8、6)·86·第30卷第1期中國(guó)給水排水中,12h后液化的脫水污泥pH值降至3.70,而此時(shí)道的要短得多,這些