PAC四级逆流吸附微滤组合工艺处理二级出水李竞

PAC/300072PACDOCUV254Langmuir60min。LangmuirPAC/PAC。DOC50%DOCUV2541．7%4．9%。PAC/PACDOC50%PAC89．4%68．3%。X703C1000－4602201619－0076－04TreatmentofSecondaryEffluentbyCombinedProcessofPACFour-stageCountercurrentAdsorptionandMicrofiltrationLIJingGUPingZHANGGuang-huiSchoolofEnvironmentalScienceandEngineeringTianjinUniversityTianjin300072ChinaAbstractThejartestwasconductedtostudytheadsorptionbehaviorofpowderedactivatedcar-bonPAConorganicsinthesecondaryeffluentfromamunicipalwastewatertreatmentplant．Thead-sorptionprocesscharacterizedbyDOCorUV254fittedwellwithLangmuiradsorptionisothermwithap-proximate60minforequilibrium．BasedonLangmuiradsorptionisothermthecalculationmethodofthecombinedprocessofPACfour-stagecountercurrentadsorptionandmicrofiltrationforremovingorganicsinthesecondaryeffluentwasputforwardanditcouldbeusedtopredictthedosageofPACandthecon-centrationoforganicsintreatedeffluent．ThevalidationresultsindicatedthatwhentheremovalrateofDOCwas50%therelativeerrorsofcalculatedandmeasuredvaluesofDOCandUV254intheeffluentwere1．7%and4．9%respectively．AdditionallythedosageofPACcouldbesavedforthetreatmentofsecondaryeffluent．WhentheremovalrateofDOCwas50%thedosageofPACdemandedbyfour-stagecountercurrentadsorptionwas89．4%and68．3%ofsecond-stagecountercurrentadsorptionandsingle-stageadsorptionrespectively．Keywordspowderedactivatedcarbonsecondaryeffluentfour-stagecountercurrentadsorp-tionmicrofiltrationadsorptionisothermPAC、、12PAC/PAC、3。PAC·67·3219201610CHINAWATEＲ＆WASTEWATEＲVol．32No．19Oct．2016PAC/PAC/。11.1DOC12．31mg/LUV2540．208cm－1pH7．87CaCO3388．9、376．0mg/LSS9．86mg/LCl－、SO2－4、NO－3、F－1544、1250、53．80、5．39mg/L。PAC105℃1h。PAC867m2/g680mg/g147mg/g11．2%4。0．45μm、3。1.2250mL100mLPAC200r/min、25℃。DOCUV254。DOCUV254－pHpHCl－、NO－3、SO2－4F－SS。22.1PAC1。807060504030201001020304050607080UV254DOC吸附时间/min去除率/%1PACFig．1ＲemovaleffectoforganicmatterbyPAC1PACDOCUV25410min10～60min60min60min。2.2PAC2。PACDOCUV254PACDOCUV254。PAC＜0．3g/LDOCUV254PACPAC＞0．3g/L。DOC50%PAC0．22g/L。807060504030201000.10.2UV254DOCPAC投量/(g·Ｌ－１)去除率/%0.30.42PACFig．2EffectofPACdosageonremovaloforganicmatterLangmuirFreundlichLangmuirPACqe=abCe1+aCe1qemg/gCemg/La、bL/mgmg/g。1DOC1/qe=0．1485/Ce+0．0116Ｒ2=0．9272UV2541/qe=0．1070/Ce+0．5206Ｒ2=0．9938。2.3DOCUV254PACDOCUV254PACDOCUV254Ｒ2=0．9905。UV254DOC、UV254DOC。2.4PACBVB·77·．watergasheat．comPAC/3219PACXC0PACCeqe=C0－CeX/V=abCe1+aCe23PAC/AB。反应器ＡC0二级出水Ce2Ce4反应器Ａ出水反应器B出水PAC反应器B搅拌桨利用四次后ＰＡＣ利用两次后ＰＡＣMF膜组件曝气管3PAC/Fig．3SchematicdiagramofcombinedprocessofPACfour-stagecountercurrentadsorptionandmicrofiltrationA0．5VAV/3PACPACCe1。B10minA0．2VPACACe2。BA0．7VB0．3VPACCe310minA0．2VA。BXPACCe40．5VB。①PAC5②③PAC。、、、CA1=3C0+2Ce2/5、CA2=25Ce1+6Ce3/31、CB=0．7Ce2+0．3Ce4、Ce3。2Ce3－Ce4X/0．8V=abCe41+aCe43、、“”23Ce3－Ce4X/0．8V+CB－Ce3X/V=abCe31+aCe34Ce3－Ce4X/0．8V+CB－Ce3X/V+CA2－Ce2X/31/30V=abCe21+aCe25Ce3－Ce4X/0．8V+CB－Ce3X/V+CA2－Ce2X/31/30V+CA1－Ce1X/5/6V=abCe11+aCe16DOC50%AB4．8、3．6L1．8L/h25．74L/h·m240．5L/hABFAFB0．40．33～6Ce1、Ce2、Ce3Ce411．52、10．68、8．79、6．155mg/L。UV254Ce1、Ce2、Ce3Ce40．191、0．172、0．132、0．081cm－1。2.52．4PAC/DOC50%PAC172．8L。1121DOCUV254。DOCUV2544。7060504030020406080100120140160180200累积出水体积/L87654321DOC/(mg·Ｌ－１)去除率/％浓度：实测值计算值去除率:实测值计算值a.DOC·87·3219．watergasheat．com706050403020100020406080100120140160180200累积出水体积/L0.1400.1200.1000.0800.0600.0400.020UV254/cm-1去除率/％浓度：实测值计算值去除率:实测值计算值b.UV2544DOCUV254Fig．4ComparisonofmeasuredandcalculatedvaluesofeffluentDOCandUV2544DOC、UV254。PACLangmuirPAC6。DOCUV2546．259mg/L0．085cm－16．155mg/L0．081cm－11．7%4．9%。DOCUV25449．5%59．4%50．0%61．1%1．0%2．8%。PAC。2.6、DOC50%PAC0．1506g/LPAC0．1681g/L2PAC0．2199g/L。PAC89．4%68．3%PAC。3①PACDOCUV254Langmuir60min。②PACDOCUV254Ｒ2=0．9905UV254DOC。③PACDOC50%DOCUV2541．7%4．9%。④PAC/PAC。DOC50%PAC89．4%68．3%。1Ivancev-TumbasIHobbyＲ．Ｒemovaloforganicxenobi-oticsbycombinedout/inultrafiltrationandpowderedacti-vatedcarbonadsorptionJ．Desalination20102551/3124－128．2CampinasMＲosaMJ．AssessingPACcontributiontotheNOMfoulingcontrolinPAC/UFsystemsJ．WaterＲes20104451636－1644．3WeiXGuPZhangG．ＲeverseosmosisconcentratetreatmentbyaPACcountercurrentfour-stageadsorption/MFhybridprocessJ．Desalination201435218－26．4．D．2012．5ZhaoCGuPCuiHetal．ＲeverseosmosisconcentratetreatmentviaaPAC－MFaccumulativecountercurrentadsorptionprocessJ．WaterＲes2012461218－226．6．D．2014．1990－。[e-mail]2015－04－14·97·．watergasheat．comPAC/3219