瓦房店市岭东污水处理厂工程设计研究

发布时间：2018-01-08 02:32

本文关键词：瓦房店市岭东污水处理厂工程设计研究　出处：《吉林大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着经济的快速发展,人民生活水平得到大幅度的提升,城市污水的产生量也逐年增加。与此同时污水的成分也变得越来越复杂,而且污水排放的标准也日趋严格,给污水厂的处理带来一定的压力和挑战。因此选择具有处理效果稳定、占地面积小、运行费用低、对污染物去除率高、控制系统先进等优点的污水处理工艺是目前污水处理厂设计工作的重点和难点。近年来瓦房店市的城市建设和工业发展速度较快,而且呈现出强劲的势头。岭东区域作为瓦房店市周边新规划区域,在瓦房店市的经济辐射作用下,发展越来越快,排水区域内工业废水、生活污水排放量逐步增加。建设瓦房店市岭东污水处理工程,对解决瓦房店市岭东地区水环境污染是十分必要的,其建成投产后将产生显著的环境和社会效益。本论文通过对瓦房店市的自然概况及城市污水水质的探究,针对瓦房店市原有的污水处理情况,对岭东污水处理厂的工艺选择及工程设计各方面的相关工艺参数进行设计并论证其可行性,使污水厂的出水水质达到排放标准,改善其现有的污水排放现状。最后通过经济评价,判断该污水处理厂在经济上是否符合污水处理行业的标准。具体内容如下:(1)通过对该地区的自然概况和原有城市排水系统现状及规划进行了解和分析,结果表明只要污水处理厂的工艺方案及流程合理,设计参数选用合理,工程措施采用得当,就能够取得良好的处理效果。(2)确定A2/O工艺作为污水处理厂的二级处理工艺,微絮凝工艺作为污水深度处理工艺,对产生的污泥进行重力浓缩和板框压滤机的机械脱水,对处理后的城市污水进行紫外线消毒,并对臭气进行生物滤池法除臭。最后根据污水工艺流程对各建筑物及电气和采暖通风等参数等进行合理的设计。(3)通过成本费用和流动资金的估算以及风险分析,得出所得税前财务内部收益率(全部投资)高于行业基准收益率5%,其投资回收期低于基准回收期15年的标准。净现值大于零,满足行业要求。
[Abstract]:With the rapid development of economy, people's living standard has been greatly improved, production of the city sewage has increased year by year. At the same time the composition of sewage has become more and more complex, and the sewage discharge standards are increasingly stringent, bring some pressure and challenges to the sewage treatment plant. It has stable treatment effect, covering small area, low operation cost, high removal rate of pollutants, the sewage treatment process control system has the advantages of advanced sewage treatment plant is currently the focus and difficulty of design work. In recent years the city construction and industrial development speed of Wafangdian City city quickly, and showing a strong momentum. As a new regional planning area surrounding the eastern city of Wafangdian City. The economic effects of radiation in the city of Wafangdian City, the increasingly rapid development of industrial wastewater, drainage area, sewage emissions increased gradually. The construction of Wafangdian City City, The sewage treatment project, to solve the water pollution in Wafangdian City City Eastern area is very necessary, it will produce significant environmental and social benefits after the completion of this thesis. By exploring the natural situation and city sewage water quality in Wafangdian City City, the sewage treatment situation in Wafangdian City City, the original, the selection of process and engineering treatment plant Yeongdong design of sewage related parameters were designed and its feasibility, the effluent water quality can reach the discharge standard, improve the existing sewage discharge status. Finally, through economic evaluation, to determine whether the sewage treatment plant with the sewage treatment industry standard in the economy. The specific contents are as follows: (1) through understanding and analysis of the current situation and natural conditions of the area planning and the city drainage system, results show that as long as the sewage treatment plant process and process Science, reasonable selection of design parameters, engineering measures used properly, can achieve good effect. (2) to determine the A2/O process as the two stage treatment process of sewage treatment plant, micro flocculation as wastewater treatment technology, mechanical dewatering and gravity concentration plate and frame filter press on the sludge produced, UV disinfection the treatment of city sewage, and deodorization of odor biological filter. Finally, according to the sewage process reasonable design for the structure and electrical and heating and ventilation parameters. (3) the cost and liquidity estimation and risk analysis, the income tax financial internal rate of return (total investment) higher than the industry benchmark rate of return of 5%, the payback period is lower than the benchmark payback period of 15 years. The standard NPV is greater than zero, to meet the requirements of the industry.

【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：X703

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