【摘要】：近些年來,隨著經(jīng)濟(jì)的快速發(fā)展以及人們生活水平的大幅提高,我國用水量迅速增長,這就導(dǎo)致了我國污水排放量的劇增,推動了我國污水處理行業(yè)的發(fā)展。因此,如何保證已投入運(yùn)行的污水處理廠高效穩(wěn)定運(yùn)行,充分發(fā)揮其污染物的削減能力,降低能耗,為我國對城鎮(zhèn)污水處理提出了更高的要求。我國污水廠普遍存在運(yùn)行能耗高,運(yùn)行效率低的問題。因此,我們應(yīng)該加強(qiáng)對市政污水處理過程優(yōu)化控制的相關(guān)研究,以更好的改善污水處理工藝以及管理中出在的各種問題,使污水處理廠經(jīng)濟(jì)高效運(yùn)行,提高城市生活污水處理效率。在我國現(xiàn)階段無論從節(jié)省資金和提高污水處理效果等方面都有重大的理論意義和現(xiàn)實(shí)意義。A/A/O同步脫氮除磷工藝在我國污水處理過程中得到廣泛應(yīng)用,普遍采用推流的方式運(yùn)行。目前國內(nèi)對污水處理過程控制有所研究,但是并沒有考慮到水處理過程污染物濃度的變化,污染物質(zhì)在推流方向上的濃度是不同的,前段污染物濃度高,后端污染物濃度低。并且,各種污染物成分差異較大,需要微生物眾多,也就需要不同的生物條件。因此,我們要針對不同的位置分別進(jìn)行控制,保證微生物充分發(fā)揮各自功能,又可降低能耗,節(jié)約操作費(fèi)用。本試驗(yàn)采用多級A2/A2/O4中試反應(yīng)器,試驗(yàn)用水采用實(shí)際生活污水。首先對多級A2/A2/O4中試反應(yīng)器的運(yùn)行效果進(jìn)行分析,COD、NH4-N、TN以及TP的去除率分別是81.87%、92.57%、66.37%和80.06%,反應(yīng)器中污染物的去除效果較好,出水水質(zhì)比較穩(wěn)定。同時,對污染物濃度以及DO、ORP、p H等參數(shù)在各級反應(yīng)池中的沿程變化情況進(jìn)行分析。針對多級A2/A2/O4中試反應(yīng)器,建立硝化反硝化過程動力學(xué)模型。根據(jù)多級A2/A2/O4工藝的特點(diǎn),確定控制目標(biāo),控制參數(shù)以及控制變量,工藝的可控變量主要是曝氣量,混合液回流量以及污泥回流量,探究可控變量對多級A2/A2/O4工藝的影響。分別調(diào)節(jié)各個可控變量,從反應(yīng)器中大量采集試驗(yàn)數(shù)據(jù),擬合相關(guān)速率方程。建立動力學(xué)模型模型,為建立控制模型打下基礎(chǔ)。
[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.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X799.3

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本文編號：2223961