东北地区城镇污水厂处理工艺优选模型及绩效评估体系研究
发布时间：2019-04-10 14:09
【摘要】：污水处理工艺的选择是新建污水厂设计阶段最为重要的步骤之一,能否根据污水厂实际情况选择合理适用的污水处理工艺直接决定了污水厂的各项建设投资支出、处理达标排放情况以及运行管理难易程度等指标。而传统的污水处理厂设计阶段的工艺选择大多数依靠相关设计人员的设计经验和主观选择,并没有一个客观、公平的评价方法。此时就需要建立起一个适用性广泛、结果合理可靠的一整套工艺选择的评价方法用于处理工艺的优选。首先本文广泛调研了东北地区31家良好运行污水处理厂的实际监测数据,从选择工艺、设计规模、排放指标以及处理效果方面对北方地区污水厂的设计参数进行统计分析,分析发现选择工艺以A/O、CAST工艺最为常见,设计规模上大中小型污水厂数量基本持平,但是大中型污水厂在处理能力上占据绝对优势,另外除3家污水厂外其余均采用的是GB二级标准,在排放标准上也有很大的提升空间。其次根据调查分析情况本文采用层次分析法(AHP法),通过分析污水厂实际价值的主要影响因素,建立了北方污水厂工艺优选评价模型,通过数学模型将定性指标进行量化,通过直观的加权比较进行工艺的优劣分析。并将建立的模型应用于辽宁省清原镇污水处理厂的工艺选择优化,使用层次分析法确定CASS工艺、A/O工艺、双氧化沟工艺和MSBR工艺的各项评价指标权重为W=(0.267,0.052,0.052,0.095,0.267,0.267)T,在通过判断矩阵计算方案层对于指标层的权重,最后计算得出总权重为0.295,0.276,0.260,0.169,对比后最终确定CASS工艺为首选,并建立公式μ=0.267a+0.052b+0.052c+0.095d+0.267e+0.267f对模型进行简化。本文还建立了城市污水处理厂的绩效评价体系对AHP法的结果进行验证,并对所选择的工艺与其他污水厂的平均值进行了横向对比。绩效评估法通过设立各项指标的标准值对污水厂的各评价维度进行评分,将其应用于大伙房上游流域小型污水处理厂的工艺优选评价,拟合出污水厂各评价指标标准值的回归方程,分析验证了各水厂所选择工艺均能优于标准水平,并根据各维度的评分对工艺的运行参数提出建议。通过维度方面的比较发现清原污水厂的设计在建设费用方面需要加以改进,南杂木污水厂的SS维度得分相比于其他水厂较低,比较得出CASS和接触氧化工艺在低能耗方面优势明显。
[Abstract]:The selection of sewage treatment process is one of the most important steps in the design stage of a new sewage plant. Whether the reasonable and applicable sewage treatment process can be selected according to the actual situation of the sewage plant directly determines the construction investment expenditure of the sewage plant. To deal with the emission standards and operating management difficulties and other indicators. However, most of the process selection in the design stage of the traditional sewage treatment plant depends on the design experience and subjective choice of the relevant designers, and there is no objective and fair evaluation method. It is necessary to set up a set of process selection evaluation methods with wide applicability and reasonable and reliable results to optimize the treatment process. Firstly, the monitoring data of 31 well-run sewage treatment plants in Northeast China are investigated. The design parameters of wastewater treatment plants in North China are statistically analyzed from the aspects of selection of process, design scale, discharge index and treatment effect. The analysis shows that the selection process is ANO, cast process is the most common, the design scale of large and medium-sized sewage plants is basically the same, but the large and medium-sized sewage plants occupy the absolute advantage in the treatment capacity. In addition, except for the three sewage plants, GB secondary standard is adopted, and there is great room for improvement in the discharge standard. Secondly, according to the investigation and analysis, this paper adopts the analytic hierarchy process (AHP), through the analysis of the main influencing factors of the actual value of the sewage plant, establishes the evaluation model of the process optimization of the northern wastewater treatment plant, and quantifies the qualitative indexes through the mathematical model. The advantages and disadvantages of the process are analyzed by intuitive weighted comparison. The model was applied to the process selection and optimization of Qingyuan Town sewage treatment Plant in Liaoning Province. The CASS process and ANO process were determined by analytic hierarchy process (AHP). The weights of the evaluation indexes of the double oxidation ditch process and the MSBR process are W = (0.267, 0.052, 0.052, 0.095, 0.267, 0.267) T, and the weights of the scheme layer to the index layer are calculated by the judgment matrix. Finally, the total weight is 0.295,0.276,0.260,0.169. After comparison, the CASS process is the first choice, and the formula 渭 = 0.267a 0.052b 0.052c 0.095d 0.267e 0.267f is established to simplify the model. In this paper, the performance evaluation system of municipal wastewater treatment plant is established to verify the results of AHP method, and the average value of the selected process is compared with the average value of other wastewater treatment plants. By setting up the standard value of each index, the performance evaluation method is applied to the process optimization evaluation of the small sewage treatment plant in the upper reaches of the large-scale houses, and the evaluation dimension of the wastewater treatment plant is evaluated by the standard value of the performance evaluation method. By fitting out the regression equation of the standard value of each evaluation index of the wastewater treatment plant, it is verified that the process selected by each water plant can be superior to the standard level, and the operation parameters of the process are suggested according to the score of each dimension. Through the comparison of dimensions, it is found that the design of Qingyuan sewage plant needs to be improved in the aspect of construction cost. The SS dimension score of Nanzagi sewage plant is lower than that of other water plants. It is concluded that the advantages of CASS and contact oxidation process in low energy consumption are obvious.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703
本文编号：2455863
[Abstract]:The selection of sewage treatment process is one of the most important steps in the design stage of a new sewage plant. Whether the reasonable and applicable sewage treatment process can be selected according to the actual situation of the sewage plant directly determines the construction investment expenditure of the sewage plant. To deal with the emission standards and operating management difficulties and other indicators. However, most of the process selection in the design stage of the traditional sewage treatment plant depends on the design experience and subjective choice of the relevant designers, and there is no objective and fair evaluation method. It is necessary to set up a set of process selection evaluation methods with wide applicability and reasonable and reliable results to optimize the treatment process. Firstly, the monitoring data of 31 well-run sewage treatment plants in Northeast China are investigated. The design parameters of wastewater treatment plants in North China are statistically analyzed from the aspects of selection of process, design scale, discharge index and treatment effect. The analysis shows that the selection process is ANO, cast process is the most common, the design scale of large and medium-sized sewage plants is basically the same, but the large and medium-sized sewage plants occupy the absolute advantage in the treatment capacity. In addition, except for the three sewage plants, GB secondary standard is adopted, and there is great room for improvement in the discharge standard. Secondly, according to the investigation and analysis, this paper adopts the analytic hierarchy process (AHP), through the analysis of the main influencing factors of the actual value of the sewage plant, establishes the evaluation model of the process optimization of the northern wastewater treatment plant, and quantifies the qualitative indexes through the mathematical model. The advantages and disadvantages of the process are analyzed by intuitive weighted comparison. The model was applied to the process selection and optimization of Qingyuan Town sewage treatment Plant in Liaoning Province. The CASS process and ANO process were determined by analytic hierarchy process (AHP). The weights of the evaluation indexes of the double oxidation ditch process and the MSBR process are W = (0.267, 0.052, 0.052, 0.095, 0.267, 0.267) T, and the weights of the scheme layer to the index layer are calculated by the judgment matrix. Finally, the total weight is 0.295,0.276,0.260,0.169. After comparison, the CASS process is the first choice, and the formula 渭 = 0.267a 0.052b 0.052c 0.095d 0.267e 0.267f is established to simplify the model. In this paper, the performance evaluation system of municipal wastewater treatment plant is established to verify the results of AHP method, and the average value of the selected process is compared with the average value of other wastewater treatment plants. By setting up the standard value of each index, the performance evaluation method is applied to the process optimization evaluation of the small sewage treatment plant in the upper reaches of the large-scale houses, and the evaluation dimension of the wastewater treatment plant is evaluated by the standard value of the performance evaluation method. By fitting out the regression equation of the standard value of each evaluation index of the wastewater treatment plant, it is verified that the process selected by each water plant can be superior to the standard level, and the operation parameters of the process are suggested according to the score of each dimension. Through the comparison of dimensions, it is found that the design of Qingyuan sewage plant needs to be improved in the aspect of construction cost. The SS dimension score of Nanzagi sewage plant is lower than that of other water plants. It is concluded that the advantages of CASS and contact oxidation process in low energy consumption are obvious.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703
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