毕设说明书.docx.docx

金堂县县城排水工程设计
专业给水排水科学与工程

摘要
伴随着我国经济的飞速发展,环境问题越来越突出。尤其是水资源方面,对水质的要求和水质的现状产生了不可协调的矛盾,对的提高形成了极大地制约,故而加快改进城乡排水体制和修建污水处理厂应日益引起重视。金堂县县城位于成都市西北,是成都重要的工业、食品区,城内现有排水体制滞后,极大制约了县城面貌和进一步发展规划。基于对上述问题的分析探讨,提出了雨污分流式排水体制,这种体制可以减少对环境污染,减少污水处理厂的规模,并可根据实际情况灵活改变,雨水管依地形就近排水,污水管则收集城区生活污水和达到排入下水道水质要求的工业废水,进而由污水主干管输送至污水处理厂进行处理。由于金堂县城区污水氮磷含量较高,故而应采取除氮除磷效果较好的工艺流程,综合各种活性污泥法的优缺点,采用A2/O同步脱氮除磷工艺,该工艺具有工艺流程简单,基建费用低,节省药剂费用外,所产生的污泥稳定性高,不需进行消化即可输送至脱水间进行脱水处理。
关键词
排水工程;分流式;A2/O同步脱氮除磷工艺
The drainage design of Jintang County
Major Water Suply and Discharge Engieering

Abstract:
With the rapid development of China's economy, environmental problems are ing increasingly prominent. Particularly water resources, water quality and water quality status of the request had irreconcilable conflicts, the development of the national economy and people's living standards had greatly restricts the formation, and therefore speed up the improvement of drainage system and construction of urban sewage treatment plant should be increasing attention. Jintang County, located northwest of Chengdu, is an important industrial, food area, the city lags behind the existing drainage system, which greatly restricted the appearance and further development of county planning. Based on the analysis of these issues discussed, the rain and sewage drainage system of distributary e up with. This system can reduce the environmental pollution, reduce the size of the sewage treatment plant, and also is flexible to change according to actual conditions. According to the terrain nearby storm sewer drainage, sewage pipe is collection of urban sewage discharged into the sewers and meet the requirements of industrial waste water, and then transported to the main pipe from the sewage treatment plant for processing. As Jintang County District sewage nitrogen and phosphorus content is high, therefore should be taken to better effect than nitrogen and phosphorus removal process. Integrated the advantages and disadvantages