改良型Carrousel2000氧化沟实用工艺计算说明书.doc
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1、word摘要本设计为灌南县田楼镇污水处理工艺设计,分两期建设,处理规模为近期2000m3/d,远期4000m3/d。进水水质为:BOD5=100mg/L,CODcr=280mg/L,SS=120mg/L,NH3-N=30mg/L,TP=3mg/L。出水水质要求达到城镇污水处理厂污染物排放标准GB18918-2002一级A排放标准,即:BOD510mg/L,CODcr50mg/L,SS10mg/L,NH3-N5mg/L,TP0.5mg/L。通过对国外不同污水处理工艺的比拟与分析,结合本工程的具体情况,最终选择改良型氧化沟工艺作为本工程的处理工艺。该工艺是在Carrousel 2000型氧化沟前设
2、置一个厌氧区,污水经厌氧、缺氧、好氧交替运行,具有同时去除有机物、脱氮、除磷的效果。该工艺不仅具有A2O的特征,同时保存氧化沟独特的水流特性,有利于活性污泥的生物凝聚作用,且不需要设置初沉池和污泥消化池,节省投资。污水处理工艺流程为:进水粗格栅调节池污水提升泵细格栅旋流沉砂池改良型氧化沟竖流式二沉池接触消毒池巴氏计量槽出水污泥处理工艺流程为:污泥泵房幅流式浓缩池贮泥池板框脱水机泥饼外运。关键词:城市污水;改良氧化沟;脱氮除磷;污泥处理AbstractThe project is a design of Tianlou Town sewege treatment plant in Guannan
3、 County,construction of two phases.The recent design scale is 2000m3/d and the long-term scale is 4000m3/d.The influent quality is shown as follow:BOD5=100mg/L,CODcr=280mg/L,SS=120mg/L,NH3-N=30mg/L,TP=3mg/L.Theeffluent water quality requires to reach the level of A discharge standards in emission st
4、andard of Urban sewage treatment plant (GB18918-2002),in whichBOD510mg/L,CODcr50mg/L,SS10mg/L,NH3-N5mg/L,TPmg/L.By paring and analyzing different wastewater treatment processes at home and abroad,bining with the specific circumstances of this project,an improved oxidation ditch process is chosen as
5、the final process of this project.This process set upan anaerobic zonein front of the Carrousel 2000 oxidation ditch and the organic matter, nitrogen and phosphorus are removed with the wastewater flowing through anaerobic, anoxic and aerobic zone alternatively.The process not only has the character
6、istics of A2O, but alsothe unique water features of the oxidation ditch, which is benefitial to thebiological coagulationof activated sludge.In addition,the process do not need to set up the early pond and the sludge digestion tank,thus it can save investment.Sewage treatment process is: inflowcoars
7、e screenwater regulating pool (sewage lift pump)fine rackvortex-type grit chamberimproved oxidation ditch the secondary sedimentation tankdisinfection tankBa Shi metering tankeffluent.Sludge treatment process is: sludge pumping roomsludge thickenersludge storage tankplant and frame filter presstrans
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