浅谈城市污水处理工程设计中的关键问题 6页

'http://www.taql.com.cn/http://www.dyqzjx.com/http://www.taianshiyantai.com/http://www.tshbcl.com/浅谈城市污水处理工程设计中的关键问题Discussthekeyissuesinurbansewagetreatmentengineeringdesign水是我们人类所共有的、有限的资源。大气中的水分变成雨水降到地表,其中一局部蒸发或者渗入公开,而大局部泄入江河,流到大海,再经过江、海、河、湖返回大气中,构成完好的大自然水循环体系。在这一循环过程中,人类所应用的水被污染,而被污染的水只要经过处置得到净化,才干重新回到大自然的水循环体系中。因而,污水处置的作用是极为重要的,是维护人类水环境,提供温馨的生活空间及作为资源有效应用所必需的和必不可少的重要环节。Wateriswehumanbeingshaveincommon,andlimitedresources.Waterintheatmosphereasrainfalltothesurface,oneofthelocalevaporationorseepingintotheopen,andlargelocaldischargedintoriversflowtothesea,againthroughtheriver,sea,river,lake,returnstotheatmosphere,formaintactnaturewatercyclesystem.Duringthiscycle,humansareapplicationofpollutedwater,andaslongasthecontaminatedwaterpurifiedafterdisposal,theabilitytoreturntothenatureofthewatercycleinthesystem.Therefore,sewagedisposaleffectisextremelyimportant,istoprotecthuman http://www.taql.com.cn/http://www.dyqzjx.com/http://www.taianshiyantai.com/http://www.tshbcl.com/waterenvironment,providecomfortablelivingspaceandasnecessaryfortheeffectiveapplicationandresourcesindispensableimportantsegment.城市污水处置工程设计中的关键问题Thekeyissuesinurbansewagedisposalengineeringdesign污水管网设计Sewagepipenetworkdesign http://www.taql.com.cn/http://www.dyqzjx.com/http://www.taianshiyantai.com/http://www.tshbcl.com/城市污水管网担负着城市污水的搜集和保送,是衔接污水产生源和污水处置厂的重要的、不可短少的环节。普通说,凡在新建市、区或扩建新区建立污水处置工程时,宜采用分流制;在已建成合流制排水系统的旧城区、小城镇等,宜将原合流制直泄式排水系统改形成截流式合流系统;在雨量稀少地域,如我国西北的局部地域或者遥远小城镇,由于污水处置范围小,街道狭窄,两侧建筑密集,施工复杂,无条件修建分流制排水系统,也可思索采用合流制排水系统。值得留意的是,当截流倍数较大时,旱季和雨季污水量相差较大,污水处置厂的进水水量及水质都随之发作相应动摇,形成冲击负荷,因而在污水处置厂工艺流程设计和设计参数选择时应对该水量、水质变化停止必要的剖析和校核,保证处置厂出水稳定达标。Urbansewagepipenetworkfortheurbansewagecollectionandwalks,sewageisconnectingthesourceandthesewagedisposalfactoryisimportant,donotbeshortlink.Average,accordingtoallthatinthenewcity,areaortheexpansionofthenewdistrictbuildingsewagedisposalproject,appropriateUSESseparatesystem;Inthedrainagesystemoftheconfluencesystemhavebeencompleted,smalltowns,theoldshouldbetheoriginalconfluencesystemdirectdischargetypedrainagesystemtoformtheclosureconfluencesystem;Inlowrainfallareas,suchasthelocalregionalordistanttownsofnorthwestinourcountry,duetothescopeofsewagedisposalofsmall,narrowstreets,buildingsonbothsides,denseconstructioniscomplex,unconditionalconstructiondiversionsystem,drainagesystem,drainagesystemandthinkingcanuseconfluencesystem.Worthyofnoteisthatwhentheclosuremultipleslarger,wastewaterquantityislarge,wetanddryconditionsofsewagedisposalplantfeedwaterquantityandwaterqualityfollowcorrespondingshake,theimpactload,thusinthesewagedisposalplantprocessflowdesignandparameterselectiontoaddressthewaterquantity,waterqualitychange http://www.taql.com.cn/http://www.dyqzjx.com/http://www.taianshiyantai.com/http://www.tshbcl.com/tostopthenecessaryanalysisandchecking,ensuretreatmentplanteffluentstandards.渣滓渗滤液对污水处置厂的影响Scumleachateeffectonsewagedisposalfactory国内一些城市,特别是中小城镇,当渣滓处置范围不大,且距城市污水处置厂较近时,常常将渣滓渗滤液经预处置或不经处置直接排入城市污水处置厂。这种状况下,设计城市污水处置厂时,需非常留意由于渣滓渗滤液高浓度废水的进入而给处置厂进水带来的水质变化。处置厂范围越小,其影响越大除渣机,渗滤液处置量与污水处置厂处置范围的比值越大,对设计参数选择、设备选型及工程费、运转费等影响越大。Somedomesticcities,especiallymediumandsmallcitiesandtowns,whendrossdisposalarelimited,andawayfromtheurbansewagedisposalplantisclose,oftenwilldrossornotthroughthepretreatedlandfillleachatedisposaldirectlydischargedintourbansewagedisposalplant.Thiskindofsituation,designofurbansewagedisposalplant,shouldbeveryattentiontoduetodrossleachateofhighconcentration http://www.taql.com.cn/http://www.dyqzjx.com/http://www.taianshiyantai.com/http://www.tshbcl.com/wastewaterintowaterqualitychangeforwaterdisposalfactory.Disposalplantrangeissmaller,theimpact,thegreatertheamountofleachatedisposalandsewagedisposalplantdispositionofrangeoftheratio,thegreaterthedesignparameterselection,equipmentselectionandconstructioncost,operationcost,etc.除臭技术Deodorizationtechnology随着我国对环境质量请求的进步和污水处置技术的开展,在设计污水处置厂的同时,思索除臭设备已提到议事日程起重机。除臭办法常用有活性炭吸附法、化学药剂吸收法、土壤法及生物法。由于活性炭吸附法去除高浓度臭气效率低且价钱高;化学药剂吸收法臭气去除效率低且操作管理复杂;土壤规律合适低浓度臭气去除及占空中积大等缺乏,目前国内外普遍采用生物除臭法,即应用微生物除臭钢塑土工格栅。该法具有合适于各种臭气浓度的脱除,且具有效率高,不产生二次污染及运转费用低等优点。因而,在我国倡议采用生物除臭更为经济合理。Alongwiththeprogressofenvironmentalqualityrequest http://www.taql.com.cn/http://www.dyqzjx.com/http://www.taianshiyantai.com/http://www.tshbcl.com/andthesewagedisposaltechnology,thedesignofthesewagedisposalplantatthesametime,thinkingaboutdeodorizationdevicehasmentionedtheagenda.Deodorizationmethodcommonlyusedwithactivatedcarbonadsorptionmethod,chemicalabsorptionmethod,soilmethodandbiologicalmethod.Becauseofthelowefficiencyofactivatedcarbonadsorptiontoremovehighconcentrationsofozoneandthepriceishigh;Chemicalabsorptionodorremovalefficiencyislowandtheoperationmanagementofcomplex;Lawsofsoilsuitableodorremovinglowconcentrationsandaccountsforthelargeairlack,thebiologicaldeodorizationmethodwidelyusedathomeandabroad,theapplicationofmicrobialdeodorization.Thelawappropriatelyinvariousconcentrationofodorremoval,andithashighefficiency,nosecondarypollutionandlowrunningcostadvantages.Therefore,initiativeinourcountryadoptmoreeconomicandreasonablebiologicaldeodorization.'