MAP法沉淀回收装置的运行条件优化研究88b64adda58da0116c1749a4

45Vol.4,No.520105ChineseJournalofEnvironmentalEngineeringMay2010MAP(,450001)MAP,MAP,90min,112L/min,98126%,74154%,92111%63166%pH918,MAP95116%70%,X70311A167329108(2010)0521047205OperatingconditionsoptimizationofaprecipitationrecoverydevicebymagnesiumammoniumphosphateprocessZhouRongminLeiYanfengYanYueWangChangnan(CollegeofWaterConservancyandEnvironmentalEngineering,ZhengzhouUniversity,Zhengzhou450001,China)AbstractAsimplemagnesiumammoniumphosphate(MAP)precipitationrecoverydevicewasdesignedandtheeffectsofreactiontimesandaerationamountsonthephosphorusremovalratewerestudiedunderthein2termittentlyoperatingcongditions.Theoptimalreactiontimewas90minutes,theoptimalaerationamountswas112L/min,thecorrespondingphosphorusremovalrateandtheprecipitationrecoveryratewere98126%and74154%respectively.Whenainfundibuliformclapboardwasaddedtoseparatethereactionregionandthepre2cipitationregion,andthedevicewasoperatedcontinuously.Thephosphorusremovalrateandtheprecipitationre2coveryratewere92111%and63166%respectively.UndertheconditionsthatwithoutaddingthephosphateandmagnesiumandonlyadjustingthepHvalueofthesludgedewateringfiltrateandoperatingcontinuously,theaver2agephosphorusremovalrateandtheprecipitationrecoveryratewere95116%and70%respectively,andtheopertatingperformancewasstable.Keywordsmagnesiumammoniumphosphate(MAP);phosphorusremoval;sludgedewateringfiltrate;operatingconditions:(2008A610009):2009-05-15;:2009-07-21:(1971),,,,E2mail:[e-mail],(magnesiumammoniumphosphate,MAP),MAP[13],MAP,MAPMAP,MAP,,MAP1111115cm,80cm,42cm,41MAPFig11SketchofMAPrecoverydevice,,,;,;,pHpH112KH2PO4PO3-4,NH4ClNH+4,MgSO47H2OMg2+,5mol/LNaOHpH,,,10m3,,,91442013454134mg/L,pH8112113MAPMAP,[4],,MAPN/P=5pH=10Mg/P=115T=20min,97%,N/P10,,pH,,MAP:60mg/L,N/P20,pH=918,Mg/P=114MAP98%,60mg/L,N/P=20,Mg/P=114NH4ClMgSO47H2O,pH=918114,[5]MAP722TAS2990(pH211MicroprocessorpHmeter)LZB23WBLZB241151.5.1,,,MAP:(1),,5000mL,;(2)5mol/LNaOHpH;pH918,,pH;(3),,10min,0145m84015:MAP,,;(4)MAP1000mL,12h,200mL,3848h,MAP1.5.22,:(1),;,,pH;(2)90min,,30min,50mL;10min,;(3)300min,2211MAP,60mg/L,pH=918,Mg/P=114,N/P=20,016L/min,MAP,22Fig12Effectofreactiontimeonphosphorusremovalrate2,,30min60min,94195%97191%,3%,3103mg/L1125mg/L;90min,98126%,1104mg/L;,98%,1mg/LMAP,,,,MAP,MAP,,90minpH=918,Mg/P=114,N/P=20,112L/min,,33Fig.3Effectofreactiontimeonprecipitationrecoveryrate3,60min,,212,,60mg/L,pH=918,Mg/P=114,N/P=20,90min,,460mg/L5000mL,KH2PO4NH4ClMgSO47H2O11316g10.3469g313303g,MAP213724g4,016114L/min,,98%,MAP016L/min112mg/L,940144Fig14Effectofaerationamountsonphosphorusremovalrateandprecipitationrecoveryrate98126%98178%,73196%74154%;,MAP,MAP,,112L/minMAP,:90min,112L/min,213pH=918,Mg/P=114,N/P=20,112L/min,90min,,,9718mL/min,90min300min,55Fig15Phosphorusremovalrateofsimulantwaterundercontinuousoperations5,,92%,,4174mg/L300min,,,718532g60mg/L26000mL,KH2PO4NH4ClMgSO47H2O618430g5318039g1713176g,MAP1213365g,MAP63166%,,:(1)90min,,90min,(2),,,214,9144mg/L,N/P,N/P=4178,Mg/P=7143,Mg/P,N/PMg/PMAP111,,pH9.8,MAP,,,MAP[4],,,MAP,,,,,9718mL/min,112L/min,pH918,300min,6,,95116%,05015:MAP6Fig.6PhosphorusandNH42Nremovalrateofsludgedewateringfiltrateundercontinuousoperations40136%,0146mg/L,12mg/L,MAP,,MAP,70%MAP,,3,MAP,:(1),MAP,90min,112L/min,98126%,74154%(2),92%,63166%,(3),,pH,95116%,0146mg/L,12mg/LMAP,70%,,,MAP,,,,,[1],,,..,2007,26(3):371376[2],,..,2007,26(4):526530[3],.MAP.,2007,23(9):8790[4]..:,2008[5].(4).:,20021501