上海长兴岛污水处理厂二期工程设计
摘要：随城镇污水指城镇居民生活污水，机关、学校、医院、商业服务机构及各种公共设施排水，以及允许排入城镇污水收集系统的工业废水和初期雨水等。随着城镇污水处理厂排放水质的提高，国内部分敏感区域(重点湖泊、重点水库、近岸海域汇水区域)城镇污水处理设施应于2017年底前全面达到一级A排放标准。通过综合考虑上海长兴岛污水处理厂二期工程的规模、进水特性、运行管理维护、设计闺规模和进出水水质要求，对国内往外此类污水处理方案的研究比选，决定采用A/A/O生物脱氮除磷处理工艺。A2/O工艺的生物处理部分由厌氧池、缺氧池和好氧池组成。厌氧池主要功能是释放磷同时部分有机物进行氨化。缺氧池的主要功能是脱氮。好氧池是多功能的能够去除BOD、硝化和吸收磷。此外该工艺还具有高效、节能的特点，且耐冲击负荷较高，出水水质好。因此，更具有广泛的适应性，完全适合本设计的实际要求。
关键词：城镇污水；脱氮除磷；工艺选择；A/A/O工艺
Design of the second Phase Project of Shanghai Changxingdao sewage treatment Plant
Abstract：Urban sewage refers to the drainage of urban residents#39; domestic sewage, institutions, schools, hospitals, commercial services and various public facilities, as well as industrial waste water and initial Rain Water, which are allowed to be discharged into the urban sewage collection system. With the improvement of the discharge water quality of urban sewage treatment plants, some sensitive areas (key lakes, key reservoirs and inshore water catchment areas) in China should fully meet the first class A discharge standard by the end of 2017. Through the comprehensive consideration of the scale of the second phase project of Shanghai Changxingdao sewage treatment Plant, the characteristics of influent water, the operation, management and maintenance, the design of purdah scale and the requirements of water quality in and out of the water, this kind of sewage at home and abroad is According to the research and selection of treatment scheme, it was decided to adopt A/O biological nitrogen and phosphorus removal process. The biological treatment part of A2 / O process was composed of anaerobic tank, anoxic pool and aerobic pool. The main function of anaerobic tank is to release phosphorus and ammonia some organic matter. The main function of anoxic tank is nitrogen removal. Aerobic tanks are multifunctional and can remove BOD, nitrification and phosphorus uptake. In addition, the process has the characteristics of high efficiency, energy saving, high impact load resistance and good effluent quality. Therefore, it has a wide range of adaptability, fully suited to the actual requirements of this design
Key words: Domestic sewage; nitrogen and phosphorus removal; process selection; A/O process
1. 前言
水是人类赖以生存的必要的物质，水污染影响人类的长远发展，所以污水治理对于人类的发展生存有重要意义，归根结底是维护生态平衡和自然界物质循环的平衡，以保持适宜人类生存的环境。随着城市的发展和人民生活水平的提高，城市污水排放量日益增大，且污水成分日趋复杂，采用传统处理方法已无法满足日趋严格的废水排放标准。本次研究充分分析了城市污水现状。综合国内外城市污水处理工艺，选择合适的处理工艺进行处理，对城市对人类对环境都是必要的一个环节。
1.1工程设计概况及要求
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