采用曝气生物滤池工艺日320m3排放量小区生活污水处理设计毕业论文.doc

摘 要 本设计采用曝气生物滤池工艺处理日排放量为320m3的小区生活污水。考虑远期中水回用问题，处理后水质达到中华人民共和国《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级排放标准的A标准要求。曝气生物滤池(Biological Aerated Filter) 简称BAF，其基本原理是在一级处理基础上，以颗粒状填料及其附着生长的生物膜为处理介质，充分发挥生物代谢作用、物理过滤作用、膜及膜和填料的物理吸附作用以及反应器内食物多级捕食作用，实现污染物在同一单元反应器内去除。反应器内存在着不同的好氧、缺氧区域，可同步实现硝化、反硝化，在去除有机物的同时达到脱氮的目的。在污水的有机物去除、硝化去氨、反硝化脱氮、除磷以及微污染水源的预处理过程中有着较好的应用前景。尤其适用于人口密集、土地资源紧缺的城镇污水和小区污水处理，且不需设置二沉池，使工艺大大简化，设备配套少，便于操作管理和掌握。 关键词：曝气生物滤池；中水回用；填料；生物膜 Abstract This design uses Biological Aerated Filter Process on emissions of 320 m3 for the District sewage. Consider the long-term problems in the water reuse, water treatment after the Peoples Republic of China to achieve urban sewage treatment plant pollutant discharge standards (GB18918-2002) in an emission standard A standard requirements. Biological Aerated Filter, or BAF, its basic principles in dealing with one based on the granular fill and its attachment to the growth of biofilms to deal with the media, give full play to the role of metabolism, physical filters, film and the film and packing Physical adsorption reactor of food and multi-level predation, and pollutants in the same unit within the reactor removed. Reactor memory in a different aerobic and anoxic region, can simultaneously achieve nitrification, denitrification, the removal of nitrogen and organic matter at the same time achieve the objective. Removal of organic matter in sewage, to nitrification of ammonia, denitrification, phosphorus and micro-polluted water pretreatment process has better prospects. Especially in densely populated, the shortage of land resources and urban sewage treatment district, and set up two no-pool, so that greatly simplify the process, equipment supporting small, easy to operate management and control. Key words: Biological Aerated Filter; back in the water; packing; biofilm 目 录 摘 要 I Abstract II 引 言 1 第一部分：设计说明书 2 1 污水处理厂设计依据，规模及进、出水水质 2 1.1 设计依据： 2 1.1.1 生活污水水质标准 2 1.1.2 设计水量的确定： 2 1.2 设计进出水指标及出水标准 3 2 小区生活污水特点 4 3 工艺比较 5 3.1