基于市政生活污水多组分处理的多生物变量调控系统

发布时间：2018-09-05 10:11

【摘要】：近些年来,随着经济的快速发展以及人们生活水平的大幅提高,我国用水量迅速增长,这就导致了我国污水排放量的剧增,推动了我国污水处理行业的发展。因此,如何保证已投入运行的污水处理厂高效稳定运行,充分发挥其污染物的削减能力,降低能耗,为我国对城镇污水处理提出了更高的要求。我国污水厂普遍存在运行能耗高,运行效率低的问题。因此,我们应该加强对市政污水处理过程优化控制的相关研究,以更好的改善污水处理工艺以及管理中出在的各种问题,使污水处理厂经济高效运行,提高城市生活污水处理效率。在我国现阶段无论从节省资金和提高污水处理效果等方面都有重大的理论意义和现实意义。A/A/O同步脱氮除磷工艺在我国污水处理过程中得到广泛应用,普遍采用推流的方式运行。目前国内对污水处理过程控制有所研究,但是并没有考虑到水处理过程污染物浓度的变化,污染物质在推流方向上的浓度是不同的,前段污染物浓度高,后端污染物浓度低。并且,各种污染物成分差异较大,需要微生物众多,也就需要不同的生物条件。因此,我们要针对不同的位置分别进行控制,保证微生物充分发挥各自功能,又可降低能耗,节约操作费用。本试验采用多级A2/A2/O4中试反应器,试验用水采用实际生活污水。首先对多级A2/A2/O4中试反应器的运行效果进行分析,COD、NH4-N、TN以及TP的去除率分别是81.87%、92.57%、66.37%和80.06%,反应器中污染物的去除效果较好,出水水质比较稳定。同时,对污染物浓度以及DO、ORP、p H等参数在各级反应池中的沿程变化情况进行分析。针对多级A2/A2/O4中试反应器,建立硝化反硝化过程动力学模型。根据多级A2/A2/O4工艺的特点,确定控制目标,控制参数以及控制变量,工艺的可控变量主要是曝气量,混合液回流量以及污泥回流量,探究可控变量对多级A2/A2/O4工艺的影响。分别调节各个可控变量,从反应器中大量采集试验数据,拟合相关速率方程。建立动力学模型模型,为建立控制模型打下基础。
[Abstract]:In recent years, with the rapid development of economy and the dramatic improvement of people's living standards, the water consumption in China has increased rapidly, which has led to the dramatic increase of sewage discharge and promoted the development of sewage treatment industry in China. Reducing capacity and reducing energy consumption put forward higher requirements for urban sewage treatment in our country.The problems of high energy consumption and low operation efficiency are common in sewage treatment plants in our country.Therefore, we should strengthen the relevant research on optimal control of municipal sewage treatment process in order to better improve the sewage treatment process and various problems in management. It is of great theoretical and practical significance to make sewage treatment plants operate economically and efficiently and to improve the efficiency of municipal sewage treatment. A/A/O simultaneous denitrification and phosphorus removal process has been widely used in sewage treatment process in China, and push-flow method is widely used. At present, the domestic sewage treatment process control has been studied, but did not take into account the change of pollutant concentration in the process of water treatment, pollutant concentration in the direction of pushing flow is different, the concentration of pollutants in the front is high, and the concentration of pollutants in the back is low. Different biological conditions are needed. Therefore, we should control the microorganisms at different locations to ensure that the microorganisms give full play to their respective functions, reduce energy consumption and save operating costs. The removal efficiencies of COD, NH4-N, TN and TP were 81.87%, 92.57%, 66.37% and 80.06%, respectively. The pollutant removal efficiency of the reactor was good, and the effluent quality was stable. Meanwhile, the concentration of pollutants and the variation of DO, ORP, and P H in different stages of the reactor were analyzed. Kinetics model of chemical denitrification process.According to the characteristics of multi-stage A2/A2/O4 process,control objectives,control parameters and control variables are determined.Controllable variables of the process are mainly aeration,mixed liquid return flow and sludge return flow.The effects of controllable variables on multi-stage A2/A2/O4 process are investigated.Controllable variables are adjusted separately from the reactor. A large number of test data are collected and the relevant rate equations are fitted. The dynamic model is established to lay the foundation for establishing the control model.
【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】：X799.3

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