《生物接触氧化工艺毕业设计》-毕业论文.doc

PAGE 92 摘 要 水污染问题是我国最大的环境问题之一，水处理的发展对我国能否实现可持续发展起着举足轻重的作用。尤其是水资源的过度开发和不合理利用，导致水污染日益严重。因此，高效、合理、经济的污水处理工艺是解决这些问题的关键。 本设计是山东济南某新区20000m3/d生活污水处理厂的初步设计。根据城市所处的地理位置和污水厂的规模，并结合脱氮除磷的要求，城市污水处理厂设计采用生物接触氧化工艺。生物接触氧化是采用生物膜水处理废水的一种方法,是以附着在载体（填料）上的生物膜，净化有机废水的一种高效水处理工艺。所选的生物接触氧化工艺具有工艺稳定性高，处理构筑物少，流程简化，节省投资等优点。 通过此工艺的处理，出水水质将达到国家《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级B标准。 关键词：生物接触氧化 污水处理厂 工艺流程 Abstract One of the foremost Environmental problems in our country is water pollution, especially because of over-exploitation of water resources and unreasonable use,water pollution is increasely serious.So,efficient,rational,economic process of wastewater treatment plant is the key to solve these problems. The design is a intial design on sewage treatment plants of a new township Ji Nan of Shan dong province.According to the location of the township ,the sacle of the plant and the requirements of nitrogen and phosphorus removal,the craft of the plant is bio-contact oxidation. Bio-contact oxidation is a kind of wastewater treatment method by using biofilm, which is a highly efficient wastewater treatment process of organic materials purification with the biomembrane attached to the carrier (commonly known as fillers). Selected bio-contact oxidation process has some advantages, such as high process stability , less structure, process simplification and saving investment. Through this craft processing, the effluent will reach the B standard of national urban sewage treatment plant emission standards (GB18918-2002). Keywords: bio-contact oxidation Sewage treatment plant Process 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc327077149 摘 要 PAGEREF _Toc327077149 \h I HYPERLINK \l _Toc327077150 Abstract PAGEREF _Toc327077150 \h II HYPERLINK \l _Toc327077151 第1章 设计概论 PAGEREF _Toc327077151 \h 1 HYPERLINK \l _Toc327077152 1.1设计依据和设计任务 PAGEREF _Toc327077152 \h 1 HYPERLINK \l _Toc327077153 1.1.1 原始依据 PAGEREF _Toc327077153 \h 1 HYPERLINK \l _Toc327077154 1.1.2 设计的基本要求 PAGEREF _Toc3270771