环境生物技术在废水除磷脱氮中的应用及进展杨嘉谟

292　　　　　　　　　　　　　　　　　　　　　　　　　　　Vol.29　No.2200703　　　　　　　　　　　J.　Wuhan　Inst.　Chem.　Tech.　　　　　　　　　　Mar.　2007:1004-4736(2007)02-0044-03环境生物技术在废水除磷脱氮中的应用及进展杨嘉谟,刘华洋,高　凤(武汉工程大学环境与城市建设学院,湖北武汉430074)　:、、,、,.:;;:X17　　　:A:2005-12-08:(1949-),,,,.:.0　　,《》(2000)[1],7,、.,25%19%.、,,、,、,、.20,、,,-EBT(EnvironmentalBiotechnology),、.,,.(、)(、),(、、)、,、,[2].,,..1　1.1　,;,[2].,:,;,.,,().,.1[2].1　Fig.1　Technologicalprocessofthreestagefornitrogenremovalbybiotechnology　　-,,.,,26.7℃～29.5℃,6∶1,2.2m/h,97.8%[3].1.2　,(H2PO4-、HPO42-、PO43-)、.[2]:,COD(VFA),VFA,,,(ATP)～(ADP),VFA,β-(PHB),..,PHB,,,.,VFA,PHB,,,,.2A/O[2].2　A/OFig.2　A/Otechnologicalprocessofphosphorousre-movalforwastewaterbybiotechnology,-,,6mg/L,97%;16.66mg/L2mg/L78.4%75.3%,[4].2　、,,.[5]:a.SBR:(SequencingBatchReactor,SBR),SBR,SBR、、,.b.A2/O:--,-(A2/O),,.c.Phoredox:/(A1/O),Ⅱ,.d.A-B:(Adsorp-tionBiodeg-radation),AB,.AB,.A80%,,,.,SBR.20,,,,.,.-SBR.SBR2070,2080,[5].SBR,SBR,CO2、H2O,,().SBR.SBR.,,452,:,,NOx.,,,SBR.,,“”,,.SBR、、,.,,,,;,.,.,,,,[2].3SBR[5].3　SBRFig.3　SBRworkingprocedurefornitrogenandphosphorusremovalofwastewater　　SBR,12h,3～5h;4h;2～5h;1h,TP()36.5～40mg/L;NH3-N()33.6～43.8mg/L;TN()40～56mg/L.,pH,SBRTP≤0.25mg/L;NH3-N≤3.6mg/L;TN≤8.3mg/L,《》(GB8978-1996)[6].3　,,UCT、OWASA、CASS、BCFS[5],.,;,、.(),,,.:,;、、,、、,,.:[1]　.(2000)[M],:,2001.[2]　.[M].:,2003.[3]　,,,.[J].,2005,31(2):18-20.[4]　,,　,.[J].,2005,31(4):4-6.[5]　,,,.[M].:,2002.[6]　,　,.SBR[J].,2003,19(5):100-101.(下转第50页)　　4629FiniteelementcalculationandanalysisofangledcracksstressintensityfactorYANGHui1,CAOPing1,WANGYi-xian1,LIZhen-zi1,HUANGShang-an2(1.SchoolofResourcesandSafetyEngineering,CentralSouthUniversity,Changsha410083,China;2.SchoolofCivilandArchitecturalEngineering,CentralSouthUniversity,Changsha410083,China)Abstract:Thispaperdealswiththecalculationofstressintensityfactor(SIF)withthefiniteelementmethod(FEM).SIFofcentralangled-crackunderuniaxialandbiaxialloadingiscalculatedwithAN-SYSfiniteelementcalculationsoftware.Bycomparingtheresultwiththetheoreticalresult,ithasprovedthatFEMisconsiderablyaccurateinthecalculationofstressintensityfactor.AftercalculatingSIFofdifferentangled-crack,theconclusionthatcrackangleaffectSIFhasbeenobtained.Thispro-videsvalidmethodforfindingfracturecriterionofangled-crackundercomplexload.Keywords:angled-crack;stressintensityfactor;finiteelementmethod本文编辑:萧　宁☆(上接第46页)ApplicationandprospectsofenvironmentalbiotechnologyinnitrogenandphosphorusremovalofwastewaterYANGJia-mo,LIUHua-yang,GAOFeng(SchoolofEnvironmentalandCivilEngineering,WuhanInstituteofTechnology,Wuhan430074,China)Abstract:Becauseofuniversalapplicationofchemicalfertilizer,pesticideanddetergents,theincreas-ingcontentofnitrogenandphosphorusofwastewaterwhichbringaboutrichnutritioninwaterhasbecomeamatterofinteresttomanypeople.Thestudyonnitrogenandphosphorusremovalofwastewaterhasbecomeanewproblem.Applicationandprospectsofenvironmentalbiotechnologyinnitrogenandphosphorusremovalofwastewaterwereintroducedinthispaper.Keywords:environmentalbiotechnology;nitrogenandphosphorusremoval;wastewater本文编辑:萧　宁5029