新型污泥脱水剂pam-dac-dmdaac对污泥脱水性能分析-analysis of sludge dewatering performance of new sludge dewatering agent pam - dac - dmd aac.docxVIP
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新型污泥脱水剂pam-dac-dmdaac对污泥脱水性能分析-analysis of sludge dewatering performance of new sludge dewatering agent pam - dac - dmd aac
投加量为2.5g/l时,污泥脱水性能最好,此时污泥比阻为6.54×1011m/kg,污泥含水率为82.06%。实验考察了污泥pH值和过滤压力对P(AM-DAC-DMDAAC)与PAC复合的污泥脱水性能的影响,结果表明,P(AM-DAC-DMDAAC)与PAC复合的最适pH值范围为6~8,最适过滤压力为0.05Mpa。通过与单独使用P(AM-DAC-DMDAAC)和CPAM相比较,证明了将P(AM-DAC-DMDAAC)与PAC复合,不仅可以有效降低污泥的处理费用,而且对污泥脱水性能有一定的改善作用。关键词:污泥脱水;污泥调理;污泥含水率;丙烯酰胺AbstractSludgeusuallycontainsalotofwater,themoisturecontentisashighas97.5%~99.5%,whichresultinverylargevolumeofsludge,agreatdealofdifficultyforfollow-uptreatmentprocessesandtransportandasubstantialincreaseinprocessingcosts.Therefore,inordertoreducethevolumeofsludge,sludgedewateringisnecessary.Themostcommonlyusedsludgedehydratingagentisacationicpolyacrylamide(CPAM),buttheCPAMisverydifficulttodegradeundernaturalconditions,andtheacrylamidemonomerhasacertaintoxicity,easytocausesecondarypollutiontotheenvironment.Therefore,tofindanovelsludgedehydratingagentthathasbothbetterperformanceofsludgedewateringandsmallerimpactontheenvironment,andthecostofsludgetreatmentisalsolower,thatbecomeahottopicofthepresentstudy.Throughthethreeyuancopolymerizationtechnologyinthispaper,withthreekindsofmonomersofacrylamide(AM),acryloylethyltrimethylammoniumchloride(DAC)anddimethyldiallylammoniumchloride(DMDAAC)asrawmaterials,dispersionstabilityagentispolypropyleneethyltrimethylammoniumchloride(PDAC),choosepotassiumpersulfateasinitiator,preparethestableP(AM-DAC-DMDAAC)sludgedewateringagentbydispersionpolymerizationtechnologyintheammoniumsulfateaqueoussolution.Investigatingtheinfluenceoftheconcentrationofmonomer,themassratioofmonomer,theamountofdispersionstabilityagentandinitiator,reactiontemperature,pHvalueandotherfactorsonrelativemolecularmassofthepolymersbysingle-factormethod,determinetheoptimalsynthesisconditions:theconcentrationofmonomeris20%,themassratioofmonomer-mDAC:mDMDAAC:mAM=2:1:1,theconcentrationofammoniumsulfateaqueoussolutionis20%,theconcentrationofPDACis1.2%,theconcentrationofpotassiumpersulfateis0.5%,reactiontemperatureis35℃,pHvalueofsystemis7.Inthissynthesisconditions,relativemolecularmassofthepolymersisbetwe
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