毕业论文--辽河流域某污水处理厂工程设计.docxVIP

本科毕业设计(论文) 题 目:辽河流域某污水处理厂工程设计 辽河流域某污水处理厂工程设计 摘 要 该污水处理厂位于西辽河的老哈河下游，该市每天有大约15万t的城市污水排放。进水水质指标为COD：270 mg/L，BOD：160 mg/L，SS：330 mg/L，TN：50 mg/L，TP：3 mg/L。该设计的主要内容有污水及污泥处理工艺流程的比 较与确定；污水及污泥处理构筑物的选择；污水及污泥处理构筑物的工艺计算；污水处理厂的平面布置及处理流程高程计算。 本设计处理使用DE氧化沟工艺。该工艺具有工艺流程短，效果好，出水水质稳定，剩余污泥少，操作方便，管理和运营成本低的特点。该污水处理厂的污水先经过粗格栅处理后从提升泵提升进入细格栅，再经曝气沉砂池进入氧化沟，之后进入辐流式沉淀池，排出的污泥首先进入污泥浓缩池等处理后再集中外运。污泥处理浓缩部分采用辐流式重力浓缩池，日常运行费低，管理较方便。最后进行了污水处理厂的整体布局和设计的计算，以及污水处理个各个处理结构和高程的布局。 关键词： 污水处理；工艺流程；DE型氧化沟 The project design of sewage treatment plant in  HYPERLINK /dict/clientsearch?mkt=zh-CNsetLang=zhform=BDVEHCClientVer=BDDTV311q=%E8%BE%BD%E6%B2%B3%E6%B5%81%E5%9F%9F \t /dict/_blank Liao  HYPERLINK /dict/clientsearch?mkt=zh-CNsetLang=zhform=BDVEHCClientVer=BDDTV311q=%E8%BE%BD%E6%B2%B3%E6%B5%81%E5%9F%9F \t /dict/_blank River  HYPERLINK /dict/clientsearch?mkt=zh-CNsetLang=zhform=BDVEHCClientVer=BDDTV311q=%E8%BE%BD%E6%B2%B3%E6%B5%81%E5%9F%9F \t /dict/_blank basin ABSTRACT Old and a sewage treatment plant in the West Liao River basin, the city had about 150,000 t of city sewage every day. Water quality index for COD:270 mg/L,BOD:160 mg/L,SS:330 mg/L,TN:50 mg/L,TP:3 mg/L. The design of sewage and sludge treatment process of comparison and determination; selection of waste water and sludge treatment structures; process calculation of waste water and sludge treatment structures; sewage treatment plant layout and process flow and elevation calculation. This design used DE oxidation ditch process treatment. The process has the short process, effective, stable effluent, sludge less convenient, characteristic of management and operational costs low. The sewage treatment plants, sewage lift pump after a thick grid into fine grid, and then by aerated grit Chamber in oxidation ditch after entering radial flow sedimentation tank, exhaust sludge thickeners in first into the handle before focus outward. Concentrated sludge treatment using radial flow gravity thickener, daily operating cost low, management more co