大连市某污水处理厂工程设计
发布时间：2018-08-31 12:10
【摘要】：大连普湾新区现状排水体制为雨、污合流制，除普兰店城区、松木岛化工园区外，其它区域排水设施均不健全。目前仅有普兰店城区污水处理厂和松木岛化工园区污水处理厂运行，其它城镇和乡村均未建设污水处理厂。虽然现已建设的部分道路铺设了污水管网，但没有形成完整的系统。由于污水收集系统不完善，污水经现有河道排入海域，不利于环境保护。 为了减少市政污水对生态环境的危害，市政府规划在普湾新区三十里堡地区建设大型污水处理厂。普湾新区三十里堡污水处理厂为普湾新区及三十里堡临港工业区规划的市政公用设施，污水厂工程建设规模为2万m3/d。主要服务范围为三十里堡临港工业区及其南侧区域，处理服务范围内的工业企业预处理达标的废水和生活污水。 根据污水处理厂进水水质特点及受纳水体环境质量标准规定的出水水质要求，通过对不同工艺对比，，确定污水处理厂采用“改良A2/O+微涡絮凝过滤”工艺，其优点为投资省、设计、运行经验多、处理水质稳定。污水厂污水首先经过格栅、沉淀池等预处理工序后，进入改良A2O反应池进行二级处理，当各项污染物指标达到排放标准后，处理后的污水进入二沉池，经污泥沉淀后，污水相继流入絮凝池、V型砂滤池和紫外消毒池进行深度处理。处理后的污水达到《城镇污水处理厂污染物排放标准》（GB18918-2002）一级A标准后，排入受纳水体。 同时，确定了二级处理工艺中，剩余污泥经过浓缩脱水形成泥饼后，外运送至垃圾填埋场处理，并且对处理过程中产生的恶臭气味，统一收集进行离子氧除臭工艺后排放。 确定了，近期污水量为2.0万m3/d，中期规模为4.0万m3/d，远期23.0万m3/d。同时，根据污水处理量及相关指标，确定了污水厂所建设各构筑物设计参数及规格，以及项目总投资为6992.59万元。 大连普湾新区三十里堡污水处理厂建成后，将大大降低城市污水对环境的污染，有效地改善城市整体环境，同时为大连市创造良好的投资环境，促进城市环境友好型经济的可持续发展。
[Abstract]:The present drainage system of Pu Wan New area in Dalian is rain and pollution confluence. Except for the city of Plantan and the Pine Wood Island Chemical Industrial Park, the drainage facilities in other areas are not perfect. At present, only the sewage treatment plant in Pulandian city and the sewage treatment plant in Songmu Island Chemical Park are in operation, and no sewage treatment plant has been built in other towns and villages. Although some of the roads that have been built have sewerage networks, they do not form a complete system. Because the sewerage system is not perfect, the sewage is discharged into the sea area through the existing river, which is unfavorable to the environmental protection. In order to reduce the harm of municipal sewage to the ecological environment, the municipal government plans to build a large sewage treatment plant in the Shilibao area of Puwan New District. The Sanshilibao sewage treatment Plant in Puwan New District is a municipal utility planned by Puwan New District and Sanshiliburg Port Industrial Zone. The construction scale of the sewage works is 20,000 m3 / d. The main service scope is Sanxilibao Lingang Industrial Zone and its south side area. The industrial enterprises in the service range pretreat the wastewater and domestic sewage that meet the standard. According to the characteristics of influent water quality of wastewater treatment plant and the requirement of effluent water quality stipulated by environmental quality standard of accepted water body, through the comparison of different processes, it is determined that the wastewater treatment plant adopts "modified A _ 2 / O micro-vortex flocculation filtration" process, which has the advantages of less investment. Design, operation experience, treatment of water quality stability. The sewage of the sewage treatment plant first goes through the pretreatment processes such as grille, sedimentation tank and so on, then enters the modified A2O reactor for secondary treatment. After each pollutant index reaches the discharge standard, the treated sewage enters the secondary settling tank, and after the sludge settles, the treated sewage enters the secondary settling tank. The wastewater flows into the flocculating tank successively, and the V sand filter and ultraviolet disinfection tank are further treated. After the treated sewage reaches the first class A standard of GB18918-2002, it is discharged into the receiving water body. At the same time, it was determined that in the secondary treatment process, the excess sludge was condensed and dewatered to form mud cake, then transported to the landfill for treatment, and the odor produced in the treatment process was collected and discharged after the ion oxygen deodorization process. It was determined that the amount of sewage in the near future was 20000 m3 / d, the medium term was 40000 m3 / d, and the future was 230000 m3 / d. At the same time, according to the quantity of sewage treatment and related indexes, the design parameters and specifications of the structures constructed in the sewage treatment plant are determined, and the total investment of the project is 69.9259 million yuan. After the completion of the Sanshilibao sewage treatment Plant in Dalian Puwan New District, it will greatly reduce the pollution of urban sewage to the environment, effectively improve the overall environment of the city, and at the same time create a good investment environment for Dalian. Promote the sustainable development of urban environment-friendly economy.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703
本文编号：2214943
[Abstract]:The present drainage system of Pu Wan New area in Dalian is rain and pollution confluence. Except for the city of Plantan and the Pine Wood Island Chemical Industrial Park, the drainage facilities in other areas are not perfect. At present, only the sewage treatment plant in Pulandian city and the sewage treatment plant in Songmu Island Chemical Park are in operation, and no sewage treatment plant has been built in other towns and villages. Although some of the roads that have been built have sewerage networks, they do not form a complete system. Because the sewerage system is not perfect, the sewage is discharged into the sea area through the existing river, which is unfavorable to the environmental protection. In order to reduce the harm of municipal sewage to the ecological environment, the municipal government plans to build a large sewage treatment plant in the Shilibao area of Puwan New District. The Sanshilibao sewage treatment Plant in Puwan New District is a municipal utility planned by Puwan New District and Sanshiliburg Port Industrial Zone. The construction scale of the sewage works is 20,000 m3 / d. The main service scope is Sanxilibao Lingang Industrial Zone and its south side area. The industrial enterprises in the service range pretreat the wastewater and domestic sewage that meet the standard. According to the characteristics of influent water quality of wastewater treatment plant and the requirement of effluent water quality stipulated by environmental quality standard of accepted water body, through the comparison of different processes, it is determined that the wastewater treatment plant adopts "modified A _ 2 / O micro-vortex flocculation filtration" process, which has the advantages of less investment. Design, operation experience, treatment of water quality stability. The sewage of the sewage treatment plant first goes through the pretreatment processes such as grille, sedimentation tank and so on, then enters the modified A2O reactor for secondary treatment. After each pollutant index reaches the discharge standard, the treated sewage enters the secondary settling tank, and after the sludge settles, the treated sewage enters the secondary settling tank. The wastewater flows into the flocculating tank successively, and the V sand filter and ultraviolet disinfection tank are further treated. After the treated sewage reaches the first class A standard of GB18918-2002, it is discharged into the receiving water body. At the same time, it was determined that in the secondary treatment process, the excess sludge was condensed and dewatered to form mud cake, then transported to the landfill for treatment, and the odor produced in the treatment process was collected and discharged after the ion oxygen deodorization process. It was determined that the amount of sewage in the near future was 20000 m3 / d, the medium term was 40000 m3 / d, and the future was 230000 m3 / d. At the same time, according to the quantity of sewage treatment and related indexes, the design parameters and specifications of the structures constructed in the sewage treatment plant are determined, and the total investment of the project is 69.9259 million yuan. After the completion of the Sanshilibao sewage treatment Plant in Dalian Puwan New District, it will greatly reduce the pollution of urban sewage to the environment, effectively improve the overall environment of the city, and at the same time create a good investment environment for Dalian. Promote the sustainable development of urban environment-friendly economy.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703
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