石化污水脱氮除磷工艺优化与动力学研究

发布时间：2018-01-22 06:06

本文关键词： 污水处理脱氮除磷硝化反应 A~2/O工艺动力学模型　出处：《清华大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来,社会经济迅速发展提高了人民的生活水平,随之而来的水体污染问题出现越来越严重的趋势,已上升为全球关注的重要环境问题之一。氮盐和磷盐的排放是造成成水体富营养化的最主要原因,为防止水质进一步恶化和有效改善环境质量,污水中碳、氮、磷的去除成为污水处理技术的关键。目前,污水处理技术得到了长足的发展,每一种新技术新工艺的开发和应用,都要建立在经济可行的前提下才能得到有效发挥和推广。2011年,国家环境保护“十二五”规划[4]对排放总量进行了具体部署和要求,对碳和氨态氮在五年内的削减总量提出了强制性目标。随着污水排放标准不断严格和新环保法的实施,许多行业老污水处理厂都相继完成了提标改造。为响应国家节能减排、实行总量达标排放目标,更深入地分析脱氮除磷工艺对污染物的生物降解过程和达到优化运行效果,本研究在相关基础理论指导和前期研究的基础上,对石化污水厂原生化处理脱氮工艺进行了必要的调整和改造。通过在生产实践中优化运行,对过程跟踪采样和计算分析,达到了既定的研究目标。主要结论如下:(1)通过调整工艺和优化参数运行,系统对碳、氮、磷的去除率分别达到80%、80%、92.24%,实现了污染物质去除和达标排放。(2)A~2/O脱氮除磷工艺的碳、氮、磷在系统的平衡比分别为97.82%、98.05%、96.19%,系统达到了长期稳定运行的效果。(3)系统缺氧段前置和分段进水解决了碳源竞争和硝酸盐影响释磷的问题,保证了反硝化脱氮、厌氧释磷、好氧生物硝化和好氧吸磷反应的顺利进行。(4)污水装置的运行过程可通过长期数据积累和建立动力学模型进行水质预测。阶段性地对模型常数修订提高模拟精度,服务于生产。
[Abstract]:In recent years, the rapid development of social economy has improved the standard of living of the people, followed by the problem of water pollution is becoming more and more serious. The discharge of nitrogen salt and phosphorus salt is the main cause of eutrophication. In order to prevent the further deterioration of water quality and improve the environmental quality effectively, carbon and nitrogen in sewage. Phosphorus removal has become the key of wastewater treatment technology. At present, sewage treatment technology has been greatly developed, each new technology and new technology development and application. In 2011, the 12th Five-Year Plan for National Environmental Protection. [(4) the specific arrangement and requirements of the total discharge amount are carried out, and the mandatory targets for the total reduction of carbon and ammonia nitrogen within five years are put forward. With the continuous tightening of the sewage discharge standards and the implementation of the new environmental protection law. Many old wastewater treatment plants in many industries have completed the upgrading of the standard. In order to respond to the national energy conservation and emission reduction, the total discharge target has been implemented. More in-depth analysis of nitrogen and phosphorus removal process on the biological degradation of pollutants and achieve optimal operation results, this study on the basis of relevant theoretical guidance and previous research. The process of denitrification for primary treatment in petrochemical wastewater treatment plant was adjusted and reformed. Through optimizing operation in production practice, process tracking sampling and calculation analysis were carried out. The main conclusions are as follows: 1) by adjusting the process and optimizing the operation parameters, the removal rate of carbon, nitrogen and phosphorus in the system has reached 80%, 80% and 92.24% respectively. The equilibrium ratio of carbon, nitrogen and phosphorus in the process of nitrogen and phosphorus removal of pollution material removal and discharge up to standard is 97.82% 98.05% and 96.19% respectively. The system has achieved the effect of long-term stable operation.) the anoxic stage of the system pre-and sub-feed to solve the problem of carbon source competition and nitrate influence phosphorus release, ensure denitrification nitrogen release, anaerobic phosphorus release. Aerobic biological nitrification and aerobic phosphorus uptake reaction. The operation process of sewage plant can be predicted by long-term data accumulation and dynamic model, and the simulation accuracy can be improved by modifying the model constant. Serve production.
【学位授予单位】：清华大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X78

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