本科毕业设计（论文）摘要西安市西南郊地区的工业生产废水和居民生活污水其混合比例为7：3,其废水水质的主要特点是含有大量的有机物，属高浓度有机废水，故其生化需氧量也较大。该混合废水的处理厂的处理水量为15万,原混合废水中各项指标为：BOD浓度为180，COD浓度为400,SS浓度为255,氨氮浓度为32。经分析知该处理水质属易生物降解，且需要二级出水经深度处理，可采用生物处理使水达到工业回用水标准,以缓解城市供水矛盾。故本设计工艺流程为:污水→粗格栅→集水井及提升泵房→细格栅→曝气沉砂池→选择池→氧化沟→二沉池→接触消毒池→出水整个工艺具有总投资小、处理效果好、工艺简单、易于管理、运行稳定、能耗小等优点.处理后的回用水可达到国家二级排放标准经深度处理后的水质如下,即：浓度≤20，浓度≤100，浓度≤20，氨氮浓度≤15。关键字：工业废水，污水处理厂，氧化沟，生活污水ABSTRACTXi’ancitysouthwestsuburbsareaoftheindustrialwastewaterandurbansewageanditsmixingratioof7：3，thewastewaterischaracterizedbycontaininglargeamountsoforganicmatter，highconcentrationorganicwastewater,thereforeitsbiochemicaloxygendemandislarge.Themixedwastewatertreatmentplantprocessingquantityis150000，,theoriginalmixingwastewaterindicators:theconcentrationofBODis180，theconcentrationofCODis400,theconcentrationofSSis255,theconcentrationofammonianitrogenis32.Throughtheanalysisoftheprocessingqualityiseasilybiodegradable,andrequirestwostageeffluenttreatmentusingbiologicaltreatment,thewatertoreachtheindustrialreusestandard，toalleviatethecontradictionofcitywatersupply。Thetechnologicalprocessofthisdesignis:Sewage→Thickgrille→Setwellandliftpumphouse→Finegrille→Aerationsinksandpool→Anaerobicpond→Oxidationditch→Twosinkthepond→Contact1本科毕业设计（论文）oxidationpond→EffluentwaterThewholeprocesshassmalltotalinvestment,goodtreatmenteffect，simpleprocess,easycontrol，stableoperation,lowenergyconsumption.Treatedwastewatercanbereusedtotwonationalemissionstandardsafteradvancedtreatmentcanreachthestandard，ThatistheconcentrationofBODislessthan20，theconcentrationofCODlessthan100,theconcentrationofSSislessthan20,ammoniaconcentrationislessthan15。KEYWORDS：organicwastewater，sewagetreatmentplant,oxidationditch,processdesign目录前言......................................................................................................................5第1章设计说明书..............................................................................................71.1设计题目..................................................................................................71.2设计任务..................................................................................................71.3设计原始资料及内容..............................................................................71.4设计要求..................................................................................................71.4.1进出水水质要求...........................................................................71.4.2处理程度要求...............................................................................81.5工艺选择..................................................................................................91.6工艺流程................................................................................................111.7主要构筑物设计说明............................................................................121.7.1粗格栅...................................................................
