食品加工业含盐废水处理工艺综合评价研究

发布时间：2018-08-31 12:09

【摘要】：含盐污水的有效处理是目前食品加工行业做好环境保护工作的主要问题。本文根据笔者日常工作经历及地区食品加工行业状况,结合企业的污水特性和污水处理工艺情况,深入分析该行业污水处理的主要影响因子,提出了对污水处理方案进行企业成本、处理效果、社会效应、行政监管等多方面指标定量标准化的研究方法。通过改进层次分析法,确定了针对食品加工行业典型含盐污水处理方案指标的权重计算方法,并结合模糊综合评价方法构建了一种综合评价指标体系。采用这种综合评价指标体系,本文对三种常见的食品加工含盐废水处理方案进行了综合比选,最终确定了较优的处理方案,并引入实际运用案例分析。主要取得了以下成果：(1)综合研究了食品加工企业含盐污水处理工作的主要问题,包括企业前期成本、后期运行、主要污染因子处理效果、环境次生问题、社会影响状况、工艺可操作性等,确定了食品加工行业含盐废水处理方案的综合评价指标。(2)采用改进层次分析法计算评价指标的权重,得出了各项指标的权重标准值,其中CODcr削减效率和脱氮效率指标的综合权重为最大。并结合模糊综合评价方法,构建了食品加工行业含盐污水处理方案的综合评价指标体系。(3)按照构建的综合评价指标体系,对升流式厌氧污泥床反应器处理方案、缺氧好氧处理方案、耐盐微生物驯化+序批式活性污泥法处理方案进行综合评价。并结合典型企业污水处理实例,证明耐盐微生物驯化+序批式活性污泥法在各方面均表现良好,具有较明显的综合优势,并对可能存在的部分问题提出了可行性建议。本研究对食品加工行业的含盐污水处理现有方案的改进具有指导意义,并对类似食品企业的生产活动和环境保护部门的管理工作提供了具参考价值的废水处理方案综合评价和比选方法。
[Abstract]:The effective treatment of salt-containing sewage is the main problem of environmental protection in food processing industry. According to the author's daily work experience and the status of the food processing industry in the region, combined with the characteristics of the wastewater and the sewage treatment process of the enterprise, the main influencing factors of the sewage treatment in the industry are analyzed in this paper. The research methods of quantitative standardization of enterprise cost, treatment effect, social effect, administrative supervision and so on are put forward. Through the improved analytic hierarchy process (AHP), the weight calculation method of typical salt wastewater treatment scheme in food processing industry was determined, and a comprehensive evaluation index system was constructed with fuzzy comprehensive evaluation method. Using this comprehensive evaluation index system, this paper compares and selects three common treatment schemes of salt-containing wastewater from food processing, and finally determines the better treatment scheme, and introduces the practical application case analysis. The main achievements are as follows: (1) the main problems in the treatment of salt wastewater in food processing enterprises are studied comprehensively, including the pre-stage cost, the later operation, the treatment effect of the main pollution factors, the secondary environmental problems, the social impact. The comprehensive evaluation index of salt-containing wastewater treatment scheme in food processing industry is determined. (2) the weight of evaluation index is calculated by using improved analytic hierarchy process (AHP), and the weight standard value of each index is obtained. The comprehensive weight of CODcr reduction efficiency and denitrification efficiency index is the largest. Combined with fuzzy comprehensive evaluation method, the comprehensive evaluation index system of salt wastewater treatment scheme in food processing industry was constructed. (3) according to the comprehensive evaluation index system, the upflow anaerobic sludge bed reactor was treated. Anoxic aerobic treatment scheme and salt-tolerant microorganism acclimation sequence batch activated sludge treatment scheme were comprehensively evaluated. Combined with a typical enterprise sewage treatment example, it is proved that the salt-tolerant microorganism acclimation sequence batch activated sludge process has good performance in all aspects, and has obvious comprehensive advantages, and puts forward some feasible suggestions for some possible problems. This study is of guiding significance to the improvement of the existing scheme of salt-containing wastewater treatment in food processing industry. The method of comprehensive evaluation and selection of wastewater treatment scheme with reference value is provided for the production activities of similar food enterprises and the management work of environmental protection department.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：X792

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