某重工业园区污水厂设计研究

发布时间：2018-10-14 19:16

【摘要】：随着工业经济发展,带来的环境污染问题不断加重。其中煤化工废水因其成分复杂,含有大量生物抑制性有机物,因此属于难降解废水的一种。该重工业园区是以煤化工、金属加工等产业为主,目前园区面积为29.03 km2,在生产过程中产生大量的煤化工废水,若不经处理排放会对周围环境造成严重危害,然而园区配套的管网和污水处理设施并未建设。因此为了达到园区废水的排放标准,针对该重工业园区废水的性质建设合理的污水处理设施能够满足经济环境发展的要求。论文依据园区排放污水监测结果确定进水水质,即:COD为48000 mg/L,氨氮为4500 mg/L,总酚为12000 mg/L。结合城市目前的给排水系统规划,通过调查分析论证,确定污水厂建设条件、厂址以及处理能力,其中污水设计水量按近期进行。在此基础上,根据污水的特点确定采用三级处理以满足排放要求,即预处理+二级生化处理+深度处理工艺方案。通过多种处理工艺进行工艺比选确定最终的处理工艺,采用加酸破乳作为除油工艺、高效复合脱氮塔作为脱氮工艺,采用UASB和A2/O工艺作为生化处理工艺,采用纳米催化电解技术和MBR工艺作为深度处理工艺,对后续的污泥脱水采用叠螺式污泥脱水设备进行浓度脱水后进行卫生填埋,臭气采用吸附法进行处理。依据水质水量及确定工艺对主要构筑物进行详细的工艺设计,并确定了技术参数选择和构筑物及设备的数量。该污水厂建成之后可达到《炼焦化学工业污染物排放标准》,COD低于150 mg/L,氨氮低于25 mg/L排放要求。项目建设后具有较好的环境效益和经济效益。
[Abstract]:With the development of industrial economy, the problem of environmental pollution is becoming more and more serious. Coal chemical wastewater is a kind of refractory wastewater because of its complex composition and large amount of biosuppressive organic matter. This heavy industrial park is mainly composed of coal chemical industry, metal processing and other industries. At present, the area of the park is 29.03 km2, which produces a large amount of coal chemical industry wastewater in the production process. If it is not treated and discharged, it will cause serious harm to the surrounding environment. However, the campus supporting pipe network and sewage treatment facilities have not been built. Therefore, in order to meet the discharge standard of wastewater in the park, reasonable sewage treatment facilities can meet the requirements of economic environment development according to the nature of wastewater in the heavy industrial park. The quality of influent water was determined according to the monitoring results of sewage discharge in the park, that is, COD = 48000 mg/L, ammonia nitrogen = 4500 mg/L, total phenol = 12000 mg/L.. Combined with the current urban water supply and drainage system planning, through investigation, analysis and argumentation, the construction conditions, site and treatment capacity of sewage treatment plant are determined, among which the wastewater design quantity is carried out in the near future. On this basis, according to the characteristics of sewage, the three-stage treatment is adopted to meet the discharge requirements, that is, the pre-treatment two-stage biochemical treatment advanced treatment process scheme. The final treatment process was determined by comparison and selection of various treatment processes. Acid demulsification was adopted as oil removal process, high efficiency compound denitrification tower as denitrification process, UASB and A _ 2 / O process as biochemical treatment process. Nanocrystalline catalytic electrolysis and MBR process were used as advanced treatment technology. The subsequent sludge dewatering was carried out with a screw type sludge dewatering equipment for sanitary landfill, and the odor was treated by adsorption method. According to the water quality and quantity of water and the determined technology, the detailed process design of the main structures is carried out, and the selection of technical parameters and the quantity of structures and equipments are determined. After completion, the wastewater treatment plant can meet the discharge standard of pollutants in coking chemical industry, and the COD is less than 150 mg/L, ammonia nitrogen less than 25 mg/L discharge requirement. After the construction of the project, it has better environmental and economic benefits.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X703

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