城市污水磁化絮凝高梯度磁分离除磷研究

-①刘吉生1,黄自力1,肖松文2,胡岳华1(1.,,410083;2.,,410012)　:-,、、、pH。500kA/m,0.3g/L,200mg/L,PAM2mg/L,pH6,3.14cm/s,COD98.35%70.8%,0.049mg/L,COD28.6mg/L。:;;;RemovalofPhosphatefromUrbanSewagebyMagneticFlocculationandHighGradiantMagneticSeparationLIUJi-sheng1,HUANGZi-li1,XIAOSong-wen2,HUYue-hua1(1.SchoolofResourcesProcessingandBioengineering,CentralSouthUniversity,Changsha410083,Hunan,China;2.ChangshaResearchInstituteofMiningandMetallurgy,Changsha410012,Hunan,China)Abstract:Urbansewageistreatedbymagneticflocculationandhighgradientmagneticseparation.Thetechnicalparameterssuchasmagneticfeeddosage,magneticfieldintensity,coagulatingagentdosage,pHvalueandflowvelocityareinvestigated.Atamagneticfieldintensityof500kA/m,amagneticfeeddosageof0.3g/L,acoagulatingagent(Al2O3)dosageof200mg/L,afilter-aid(PAM)dosageof2mg/L,asewagepHof6andaflowvelocityof3.14cm/s,phosphateandCODremovealratesare98.35%and70.8%,respectively,withaphosphatecontentof0.049mg/LandCODcontentof28.6mg/Linpurifiedwater.Keywords:urbansewage;magneticflocculation;highgradientmagneticseparation;removalofphosphate　　,,,,,。,,。199811《》(GB8978-1996),(P)0.5mg/L[1]。,[2]、[3～4]、[5～6]。,,,(),。、、。-,。1　　1.1　,,-,(P)2.98mg/L,(CODCr)97.83mg/L,30NTU,130,。1.2　:,98%,4.55μm,CP。:,Al2(SO4)3·18H2O,CP。:(PAM),CP。pH:、,AR。1.3　,1。,。,,,5%。。pH,、,,,。2。()235200310矿　冶　工　程MININGANDMETALLURGICALENGINEERINGVol.23№5October2003①:(59925412):2003-05-20　　　　,(),(),(),。,,()。1　2　1.4　(P)。2　,,、、、,,、、、pH()。2.1　pH=6,500kA/m,Al2(SO4)3·18H2O200mg/L,PAM2mg/L,1cm/s0,0.3,0.5,1,25g/L,3。3　3,,,。0.5g/L,,,,,。0.3g/L,98%。,,Fe3O4,。2.2　,5g/L,Al2(SO4)3·18H2O200mg/L,PAM2mg/L,pH6,1cm/s。200,300,400,500,600800kA/m,4。4　4,,。、,,:FM=χVHdHdx(1)FM;χ;V;H;dHdx。,dHdx,,,H,、、,。2.3　pH=6,500kA/m,5g/L,PAM2mg/L,pH6,1cm/sAl2(SO4)3·18H2O0,50,100,200,300400mg/L,5。5,,,,,。Al2(SO4)3·18H2O200mg/L,255:-　　　　　　　99%。,,。5　2.4　pH500kA/m,5g/L,Al2(SO4)3·18H2O200mg/L,PAM2mg/L,1cm/spH3,4,5,6,78,6。6　pH6,pH=5.0～7.0,,98%。H3PO4Al3+pH[7]。Al3+PO43-AlPO4,pH,pH=5.0～7.0,AlPO4,。2.5　500kA/m,5g/L,Al2(SO4)3·18H2O200mg/L,PAM2mg/L,pH=6.00.5,1.0,1.76,2.343.14cm/s,7。7,3.14cm/s,,。,。2.6　,、:pH=6,0.3g/L,500kA/m,200mg/L,PAM2mg/L,3.14cm/s。,COD98.35%70.8%,0.049mg/L,COD28.6mg/L。7　3　　　1)-,pH=6,0.3g/L,500kA/m,200mg/L,PAM2mg/L,3.14cm/s,0.049mg/L,98.35%,。2)Fe3O4,,,(,);。3),,,、、,。[1]　.GB8978-1996[2]　.().,1998,24(8):69～73[3]　,.———.,1998,18(2):45～46[4]　　..,2000(10):55～56[5]　..:,1989[6]　　..,1994,20(8):40～42[7]　AhamdaMH,Shaikh,DixitSG.RemovalofPhosphatefromWatersbyPrecipitationandHighGradientMagneticSeparation.WaterRes,1992,26(26):845～85226　　　23