摘 要I4 万吨污水处理厂氧化沟工艺设计说明书万吨污水处理厂氧化沟工艺设计说明书摘 要随着我国社会经济的不断发展，城市化水平的逐步提高，环境保护措施的 落实，以及市场经济的建立，排水事业作为城市的重要基础设施这一，也得到 了蓬勃的发展。全国大多的城市都对老城区的给排水管网进行了改造，并且还 兴建了一大批污水处理厂对城市的生活污水，工业废水进行处理。 本设计是对南京市建邺区某一排水工程设计。其设计范围包括：雨水管网 工程、污水管网工程和污水处理厂工程。本次设计均采用了国家最新的有关规 定、标准、和设计规范。 管网的体制采用的是分流制。污水处理厂设计规模近期 40000 m3/d，远期 60000m3/d，故本设计按近期设计,远期规划。污水厂二级处理出水排至河流下 游。 污水处理厂处理流程为：污水中格栅提升泵房细格栅钟式沉砂池 氧化沟二沉池紫外消毒出水。 污泥流程：剩余活性污泥污泥提升泵房浓缩脱水一化车间 污泥外 运。 本污水处理厂占地约为 7.2 公顷。 关键词：污水管网 雨水管网 氧化沟 浓缩脱水一体化设备南京林业大学南方学院毕业论文IIProcess design of 40000t/d city sewage treatment plantAstractWith the develop of our country society economy continuously, Vitalization is gradually increasing, Environmental protection measure of practical, and with establishing of the Market economy, Draining, As one of the important foundation facilities, also got a fast development. The city in the whole nation almost reform drainpipe net. And still built the dirty water of large quantity disposal the factory to discard the water to proceed to handle to city. This project is for designing sewerage engineering of Nanjing city Jianye District. The design includes stremwater drainage system and wastewater collecting system and sewage works . And this design all adopted national latest relevant provision, Standard, with design the norm. The system of pipe net adopts is the bridging system . Sewage treatment plant design scale now is 40000m3/d, in the future date is 60000m3/d . The rainfall is all putd in order into San Ming River and the handled sewage from the sewage plant put into River. The sewage treatment plant handle the distance travelled by a stream of water being : SewageCoarse screensSewage elevated pumb houseFine screensrotated Grit chamberOxidation ditch Secondary sedimentation tank UV Sterilize in poolRiver.Sludge distance travelled by a stream of water : Remainder sludgesludge elevated house the concentration and dehydration workshop Transport outside the sludge Covers an area of and act as 7.2 hectares around in this the sewage treatment plant .Keywords: solid pipe net rainwater tule net Sewage treatment plant Oxidation ditch the concentration and dehydration workshop目 录III目目 录录摘 要 .IAstract.II 第一章 绪论.1 1.1 设计原则及目的.1 1.1.1 设计原则.1 1.1.2 设计目的.2 1.2 城市概况及自然条件.2 1.2.1 城市概况.2 1.2.2 自然条件.2 1.3 城市供水及排水工程现状.3 1.4 排水工程规划原则.3 1.5 设计指导思想及意义.3 第二章 方案论证.5 2.1 污水量及水质论证.5 2.1.1 设计年限.5 2.1.2 污水量预测.5 2.1.3 污水进出水水质.7 2.1.4 处理程度.8 2.2 排水系统方案论证.82.2.1 排水体制的选择.8 2.2.2 设计原则.9 2.2.3 污水处理厂厂址选择及排放水体论证.9 2.3 污水，污泥处理工艺方案.10 2.3.1 污水处理工艺.10 2.3.2 常规二级处理工艺.11 2.3.3 污水脱氮除磷工艺.12 2.3.4 生物脱氮除磷基本原理.14 2.3.5 污水生物脱氮除磷工艺.16 2.4 污水处理厂工艺选择的方案比较.20 2.4.1 方案一 Carrousel 2000 氧化沟.