包头市污水厂处理工艺的选择

段连钧1,李金国2,谷兆全1(1.包头市排水产业有限责任公司,内蒙古包头014030;2.中国市政工程华北设计研究总院,天津300074):针对包头市污水处理厂进水B/N值低出水TN要求高的特点,选择改良A2/O工艺为污水处理工艺,并严格控制生物池的DO和ORP值,实现污水的短程硝化反硝化,降低能耗在进行污水厂设计时,要合理设计初沉池,以充分利用原水中的碳源,减少或避免外加碳源;此外,还要合理选择内回流比,以降低运行成本和基建投资:包头市污水厂;改良A2/O工艺;初沉池;内回流比:X703:C:1000-4602(2010)10-0126-03ChoiceofSewageTreatmentTechnologyinBaotouWWTPDUANLianjun1,LIJinguo2,GUZhaoquan1(1.BaotouDrainageIndustryCo.Ltd.,Baotou014030,China;2.NorthChinaMunicipalEngineeringDesignandResearchInstitute,Tianjin300074,China)Abstract:BecauseoflowinfluentB/NvalueandhighrequirementofeffluentTNofWWTPinBaotouCity,themodifiedA2/Oprocesswasselectedasthewastewatertreatmentprocess,andtheDOandORPvaluesofthebiologicalpoolwasstrictlycontrolledtoachieveshortcutnitrificationanddenitrificationofwastewaterandreduceenergyconsumption.Duringtheprocessdesign,theprimarysedimentationtankshouldbereasonablydesignedtomakefulluseofcarbonsourceintherawwastewaterandreduceoravoidadditionalcarbonsource.Inaddition,theinternalrefluxratioshouldbereasonablychosentoreducetheoperationcostsandthecapitalinvestmen.tKeywords:BaotouWWTP;modifiedA2/Oprocess;primarysedimentationtank;internalrefluxratio,,,,,,1包头市城市污水水质(7104m3/d)(3104m3/d)(2104m3/d)(1986,4.5104m3/d;2006,10104m3/d),11,(CODBOD5SSTNNH+4-NTP)B/N!(GB18918∀2002)A,TNNH+4-NTP,#126#第26卷第10期2010年5月中国给水排水CHINAWATER&WASTEWATERVo.l26No.10May20101Tab.1InfluentqualityandTNremovaleffectofeachWWTPinBaotouCityCOD/(mg#L-1)BOD5/(mg#L-1)SS/(mg#L-1)TN/(mg#L-1)NH+4-N/(mg#L-1)TP/(mg#L-1)B/NTN/%85035032090759.03.8983.365027025065508.04.1576.985035035080658.04.3781.370030032065506.54.6176.9,,,1379.17mg/L1631.87mg/L780.99mg/L;,,;,,,,,,CODNH+4-N,()B/NTN(TN80%),∃%,∃%,B/N(C/N),,2.86(1gNO-3-NN22.86g),3(),!(GB50014∀2006)∃,BOD5/TKN4.0%2处理工艺选择,,,;,A/OA2/OSBRABADMONTLINPORNLINPORC/NMBR,,A2/O[1]A2/OA2/O,,,A2/OA2/O,A2/O,,,A2/O11A2/OFig.1FlowchartofmodifiedA2/Oprocess3工程设计措施31DO,200911:12&DO,;,;12&,TNNH+4-N,DO,DO,;DO(DO∋0.5mg/L),,DOORP,TNNH+4-NNO-3-N,32,(,,#127#段连钧,等:包头市污水厂处理工艺的选择第26卷第10期;,,,,,,,,,,)(),,COD,∗,,,33,(),,,SNO-3,D=CN,IAT-SorgN,EST-SNH+4,EST-XorgN,BM(1)SNO-3,D∀∀∀CN,IAT∀∀∀SorgN,ESTSNH+4,EST∀∀∀SNO-3,EST∀∀∀XorgN,BM∀∀∀,(0.04~0.05)CBOD5,IAT:SNO-3,DCBOD5,IAT=0.75#OUC,BOD52.9#VDVAT(2)CBOD5,IAT∀∀∀BOD5VD∀∀∀VAT∀∀∀/OUC,BOD5∀∀∀,BOD5BOD5SNO-3,D/CBOD5,IAT,,VD/VAT0.5,SNO-3,D/CBOD5,IAT0.15mgN/mgBOD5,,:D∋1-11+RC,RC=D(1-D)(3)RC∀∀∀(,4.0)D∀∀∀,,;,,,;,,,,4结论,A2/O,DOORP,,;,,;,,:[1],.A2/O[M].:,2009.E-mail:[e-mail]:2010-01-13#128#第26卷第10期中国给水排水