改性硅藻土絮凝剂的制备及对污泥的脱水效能张尊举

12111．0660042．066004、。30∶1、350℃、3h。SV3088%45%、11．4×1012m/kg1．23×1012m/kg、96．8%79．6%。。X703C1000－4602201113－0086－03PreparationofModifiedDiatomiteFlocculantandItsPerformanceinSludgeDewateringZHANGZun-ju1SONGLai-zhou2ZHANGRen-zhi1LIGuo-hui11．ExperimentalTreatmentCenterEnvironmentalManagementCollegeofChinaQinhuangdao066004China2．CollegeofEnvironmentalandChemicalEngineeringYanshanUniversityQinhuangdao066004ChinaAbstractAkindofmodifieddiatomiteflocculantforsludgedewateringwaspreparedusingdiat-omiteasmainmaterialandpolyaluminumchloridePACasadditive．Theprocedureofthepreparationandtheperformanceindewateringofsewagesludgewerestudied．TheresultsshowthattheoptimizedconditionsforpreparingthemodifieddiatomiteflocculantarethatthemassratioofdiatomitetoPACis30∶1theheattreatmenttemperatureis350℃andthecalcinationtimeis3h．Whenthemodifieddiatom-iteflocculantisaddedthesludgesettlingratioanddewateringperformanceareobviouslyimproved．The30-minutesettledvolumedeclinesfrom88%to45%thespecificresistancetofiltrationreducesfrom11．4×1012m/kgto1．23×1012m/kgandwatercontentinsludgecakedecreasesfrom96．8%to79．6%．Itisconcludedthatthesludgedewateringperformanceisgreatlyimprovedaftertreatmentbythemodifieddiatomiteflocculant．Keywordsmodifieddiatomiteflocculantsludgedewateringsludgesettlingratiospecificresistancetofiltrationofsludgewatercontentinsludgecake07215617Z2007420·68·271320117CHINAWATER＆WASTEWATERVol．27No．13Jul．2011。1～5PAM。PAM6PAM。。。11.1PAC、PAM。。、。1.21.2.1PAC250mL5min2h100。1.2.2PAM120mg/L3kg。1.2.3XL30E55+FRA106FTIR4cm－1。1.2.4100mL100mL。。。1.2.5R100mL1min50kPa15sV、。t/VV1bACPμ。R=2bPA2μC11.2.6W1105℃24hW2ηη=W1－W2/W1×100%22pH、。2.11638、3482cm－1Al—OHAlAl—OH。Al—OH。2.21。1Fig．1Surfacemorphologyofdiatomite1、·78·．watergasheat．com2713。、。2.35∶1、10∶1、15∶120∶1、30∶116．7%、9．1%、6．3%、4．8%、3．2%2g50mL5min450℃2h。15∶1、20∶1、30∶130∶1。30∶1。2.430∶1、5min150、200、250、300、350、400、450、500、550℃2h。350℃。2.530∶15min350℃0．5、1、1．5、2、2．5、3h。3h。2.630∶1、350℃、3hPAC、PAM、。SV3088%45%2、11．4×1012m/kg1．23×1012m/kg、96．8%79．6%PAC3．33×1012m/kg、95．3%、PAM1．68×1012m/kg、84．0%2．33×1012m/kg、87．5%。2Fig．2Effectofdifferentflocculantsonsludgesettling330∶1、350℃、3h。SV3088%45%、11．4×1012m/kg1．23×1012m/kg、96．8%79．6%。。1．J．2003191240－42．2YamaneY．WatersupplysludgetreatmentinJapanJ．Water2005211226－29．3HarbourPJ．FundamentaldewateringcharacteristicsofpotablewatertreatmentsludgeJ．JWaterResTechnol200453129－36．4．J．2[e-mail]2010－12－10·88·2713．watergasheat．com