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1、污水處理廠初步設(shè)計(jì)方案摘要本設(shè)計(jì)是天津市某開(kāi)發(fā)區(qū)污水處理廠的初步設(shè)計(jì)和施工圖設(shè)計(jì)。該處理廠處理城市污水。水質(zhì)較復(fù)雜：懸浮物（SS）：200mg/L；五日生化需氧量（BOD5）：200mg/L；化學(xué)需氧量（CODcr）：400mg/L；總氮（N）：40mg/L；總磷（P）：4.0mg/L；重金屬及有毒物質(zhì)：微量；處理后的水質(zhì)要求：BOD5≤20mg/L；SS≤20mg/L；N≤15mg/L；P≤1mg/L；根據(jù)設(shè)計(jì)要求和求新的思想，該污水處理工程進(jìn)水中氮、磷含量均偏高，在去除BOD5和SS的同時(shí)，還需要進(jìn)行脫氮除磷處理，故采用當(dāng)代水處理工藝
2、中較流行的三溝式氧化溝工藝。該工藝綜合了以往工藝的優(yōu)點(diǎn)，具有廣泛的適應(yīng)性，完全適合本設(shè)計(jì)的實(shí)際要求。本工藝的主要構(gòu)筑物包括閘門井、格柵、污水泵房、曝氣沉砂池、氧化溝、接觸池、濃縮池、污泥脫水機(jī)房等。本設(shè)計(jì)采用了脫氮除磷工藝和性能優(yōu)良的設(shè)備，且工藝流程簡(jiǎn)單，省去了初沉池、二沉池、消化系統(tǒng)和回流設(shè)備，節(jié)省了基建投資和運(yùn)行費(fèi)用，同時(shí)曝氣設(shè)備和構(gòu)造形式多樣，運(yùn)行靈活，管理方便，保證出水達(dá)到污水排放標(biāo)準(zhǔn)，做到了水資源的合理利用。關(guān)鍵詞：三溝式氧化溝格柵濃縮池泵房新工藝23AbstractItisapreliminarydesignandconstr
3、uctiondrawingforthesewagetreatmentplantdevelopmentzoneofTianjin.Thisplanttreatmunicipalsewage,mainly.Itswaterqualityismorecomplicated:Suspendedsubstance(SS):200mg/L;Thebiochemicaloxygendemand(BOD5)offivedays:200mg/L;Thechemicaloxygendemand(CODcr):400mg/L;Totalnitrogen(N):
4、40mg/L;Totalphosphorus(P):4.0mg/L;Heavymetalandnoxioussubstance:Trace;Treatedwaterqualityisrequired:BOD5≤20mg/L;SS≤20mg/L;N≤20mg/L;P≤1mg/L;Accordingtothedesigningrequirementandthoughtoflookingfornovelty:thecontentofnitrogenandphosphorusareonthehighsideinthisprojectwaterqu
5、ality,soitshoudbedealedwith,whilegetridofBOD5andSS.Weadoptanduseakindofcraft,whichisacomparativelyextensivedenitrificationcraftsatpresent,namely,3ditchtypeoxidizingcraft.Theadvantageofthiscomprehensivecraftisextensiveadaptability,totallysuitableforrealityoriginallydesigne
6、d'spurpose.Itsmainstructuresincludgatewell,grid,sewagepumpinghouse,earateandsinkingsandpool,oxidizingditch,contactingpool,concentrationtank,mudtodehydrateinthecomputerlabetc.Thisdesignhaveadoptedthedenitrificationcraftandequipmentofgoodperformance,andtheprocedureissimple,
7、managementisconvenient,donotneedtoaddthefirstsinkingpool,thesecondsinkingpool,digestivesystem.reducingbuildingandoperatingexpenses,realizingautomationtotallyatthesametime,easytomanage,makingthetreatedwaterreachsewagedischargestandard,accomplishtherationalutilizationofwate
8、rresource.Keywords:Typesofthreeditchoxidizingditch,Grid,Concentrationpool,Pumpinghouse,Newcraft2
