高pH值太湖原水应对技术研究及应用

檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲殘殘殘殘pH1，1，1，2(1．，215002;2．，200092)pH，pHpH。，、(PAM)。，pH，pH，，;PAM，pH;，pH。;;;;pH;TU991．22B1673－9353201503－0036－05doi10．3969/j．issn．1673－9353．2015．03．009StudyandapplicationofmethodcopingwiththehighpHrawwaterfromTaihuLakeHuaWei1ZhangXue1JiangFuchun1DongBingzhi21．SuzhouCityWaterCompanyLimitedSuzhou215002China2．TongjiUniversityShanghai200092ChinaAbstractTherisingpHofrawwaterinhightemperatureseasonwasabigprobleminwaterworksofshallowlakesource．ThehighpHandlowalkalinitycoulddecreasecoagulationandsedimentationeffectandfluctuatethepHinoutflow．AimedatthisissueapilottestwascarriedoutinseveralaspectssuchasprechlorinationcoagulationaidPAMandalkalinitysupplementation．TheresultsindicatedthattheprechlorinationcoulddecreasepHdirectlyandimprovecoagulationandsedimentationeffectsoastodecreasecoagulantdosageinrawwaterfromTaihuLakewithlowalkalinityandhighpH．DosingPAMcoulddeclinecoagulantdosageandmaintainpHinsedimentationoutflow．AlkalinitysupplementationcouldnotonlyreducecoagulantdosagebutalsostabilizetheoutflowpHinsedimentationtank．KeywordsTaihuLakerawwaterprechlorinationcoagulationaidpHalkalinity2012ZX07403－001C。。·63·9320156WATERTECHNOLOGYVol．9No．3Jun．201520075291。、pH。pH7．30～9．44pH10．4pH7．50～8．728．952。pH。、、、4pH7．4～9．2。pH。11.1pH6—10pH、DO、、、。7pH000—800pH800800pH1600。pHpHpH。、。1.2、PAM、pH。1.2.1PAMPAMpH。PAMPAMPAM。PAM1。1PAMTab．1VarietyandtypeofPAMintestABAACPAM1#2#3#4#5#6#13。AS15mg/LPAM0．050．100．15mg/L2min。PAM30s、12345min。2。6m3/h200m22、1UF。。①21AS15mg/LASAS2minPAM0．05mg/L。PAM。②1PAMAS22．5mg/L。2ASPAMPAM0．05mg/LAS22AS。2ASPAMASPAMAS。1.2.2Al3++3OH－=AlOH3AlOH3。。pH。CaO1．44%NaOH1%0．5mL。3min1/3AS·73·20156，:pH93。1.2.3PAM。26。2Tab．2Coagulationschememg·L－11#2#3#4#5#6#707070707070120000000．050．10000000．5322.1。pH。。H+pH。Cl2+H2OHCl+HClO1HClOH++ClO－26—10。pH。pH。0．1mg/L。2.2PAM2.2.1PAM1。1#、、PAM。0.05mg/L0.10mg/L0.15mg/L1试题编号23451.71.61.51.41.31.21.11.00.90.8沉后水浊度/NTU06PAM投加量：1PAMFig．1ComparisonofturbidityremovaleffectindifferenttypePAMlowturbidity2#、4#5#3#6#PAM。PAM0．050．100．15mg/L2#、4#、5#0．05mg/LPAM。PAM2PAM0．05mg/L。22#、4#5#3#6#3．5NTUPAM。试验编号2#3#4#5#6#6543210沉后水浊度/NTU2PAMFig．2ComparisonofturbidityremovaleffectindifferenttypePAMhighturbidityPAM30s、1min、2min、3min、4min5min6．3NTU15mg/L0．1mg/L。PAM2min1/5。·83·93201562.2.22#、4#34#2#23．5%。4#、5#45#0．91NTU4#0．63NTU。5#4#0．28NTU30．7%。4#。沉后水浊度/NTU取样编号41.31.21.11.00.90.80.70.602681012142#4#32#、4#Fig．3Comparisonandselectionoftesteffectinpilot2#and4#4#5#沉后水浊度/NTU1.11.00.90.80.70.60.50.40.3取样编号42681012044#、5#Fig．3Comparisonandselectionoftesteffectinpilot4#and5#22．5mg/L4#7．5mg/L33．3%。PAM0．05%0．1mg/L0．00005mg/L《》《》GB5749—20061/10《》1/2。2.35。5NaOHpH。25%。pH。CaOpHNaOH。NaOH+AS出水浊度CaO+AS出水浊度NaOH+AS出水pHCaO+AS出水pH608.07.87.67.47.27.06.8浊度/NTUAS/（mg·L-1）+碱液/mL6.05.04.03.02.01.00pH35+0.540+0.545+0.550+0.555+0.55Fig．5Influenceofdosingalkalinesolutiononcoagulationandsedimentationeffect2.46。3#、4#、5#34#、5#2NTU4#、5#。pH4#pH7．55#pH8。4#。pHpH。0．1mg/L1NTU。方案编号1#浊度/NTU141210864201098765pH2#3#4#5#6#浊度pH6Fig．6Comparisonofcoagulationeffectindifferenttechnicalschemes·93·20156，:pH933①pHpHpH。②0．1mg/LPAMpH30%PAM。③0．5mg/LNaOHpHpH、。④PAMASpH。1．———J．2007229896－906．2．D．2006．3CECS130—2001S．1973－。[e-mail]2015－03－19，、、、、。，。。()·04·9320156