本文選題：污水處理 + 現(xiàn)狀分析��； 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：目前發(fā)達國家污水處理工藝已經(jīng)由二級處理轉(zhuǎn)為三級處理,而我國污水處理工藝主要以二級為主,且以引進國外污水處理技術(shù)為主。由于引進的污水處理技術(shù)不能完全適應(yīng)我國國情,導(dǎo)致很多污水處理廠污水處理效率低,出水水質(zhì)依然執(zhí)行較低標準,環(huán)境污染形勢加劇。因此,污水工藝的提高對改善我國水資源緊缺和環(huán)境污染等具有重要現(xiàn)實意義。通遼市地處內(nèi)蒙古自治區(qū)東部,屬于嚴重缺水地區(qū)。隨著經(jīng)濟的不斷發(fā)展,該區(qū)域的需水量不斷加大,而供水量卻在每年逐步減少。通遼市屬于中等發(fā)展中城市,與國內(nèi)同級別城市相比,通遼市污水處理廠采用的污水處理工藝較為單一,個別污水處理廠仍然采用一級沉淀等較為落后的污水處理工藝,污水處理效率較低,70%污水處理廠仍然執(zhí)行《城鎮(zhèn)污水處理廠污染物排放標準》(GB18918-2002)一級B標準。污水回用率低和水環(huán)境污染問題日益突出。本論文以通遼市污水處理工藝分析、污水出水水質(zhì)水量分析和排水去向分析,通過定量分析法和比較研究等方法,分析通遼市污水處理現(xiàn)狀、水環(huán)境現(xiàn)狀及面臨的主要問題,研究通遼市污水處理廠建設(shè)承泄區(qū)方案問題,通過對承泄區(qū)的選址、采用的工藝流程和效果、出水水質(zhì)等進行分析、評價,為改善通遼市污水處理現(xiàn)狀,城鎮(zhèn)污水處理廠承泄區(qū)布局規(guī)劃提供可供參考的新思路。通過本文的研究,主要得到以下結(jié)論:(1)通遼市污水處理廠采用的污水處理工藝較為單一,個別污水處理廠采用的污水處理工藝落后。通遼市污水處理出水量達不到設(shè)計標準,60%污水處理廠出水水質(zhì)總氮、總磷等重要指標達不到標準,污水處理率較低。(2)通遼市污水排水去向主要以直接排入江河湖、庫等地表受納體,再生水配置主要以工業(yè)回用為主。(3)人工濕地污水處理工藝最為適合作為通遼市承泄區(qū)污水處理工藝,經(jīng)承泄區(qū)處理之后的污水水質(zhì)規(guī)劃可以滿足工業(yè)中水回用、景觀綠化等不同方面的用水需求,在通遼市建立承泄區(qū)的方案是可行的,對提高通遼市水資源利用率,環(huán)境保護、生態(tài)建設(shè)方面具有實際意義。
[Abstract]:At present, the sewage treatment process in developed countries has been changed from secondary treatment to tertiary treatment, while in our country, the main process is secondary treatment, and the import of foreign wastewater treatment technology is the main.Because the imported sewage treatment technology can not fully adapt to the national conditions of our country, many sewage treatment plants have low treatment efficiency, the effluent quality still carries out the lower standard, and the environmental pollution situation is aggravated.Therefore, the improvement of sewage technology is of great practical significance to improve the shortage of water resources and environmental pollution in China.Tongliao City is located in the eastern part of Inner Mongolia Autonomous region, a serious water shortage area.With the development of economy, the water demand in this area is increasing, but the water supply is decreasing year by year.Tongliao is a medium developing city. Compared with the domestic cities of the same class, the sewage treatment plant in Tongliao city has a single sewage treatment process, and some sewage treatment plants still adopt the backward sewage treatment technology such as the first grade sedimentation, etc.The wastewater treatment efficiency of 70% of the wastewater treatment plants is still in accordance with the first class B standard of pollutants discharge Standard of Municipal sewage treatment plants (GB18918-2002).Low reuse rate of sewage and pollution of water environment are becoming more and more serious.In this paper, the wastewater treatment status, water environment and main problems in Tongliao City are analyzed by means of analysis of wastewater treatment process, analysis of effluent quality and discharge direction, quantitative analysis and comparative study.In order to improve the present situation of sewage treatment in Tongliao City, this paper studies the construction scheme of sewage treatment plant in Tongliao city, analyzes the site selection, the process flow and effect adopted, the quality of effluent, etc., and evaluates the problems of construction and discharge area of sewage treatment plant in Tongliao City.The layout planning of urban sewage treatment plant drainage area provides a new idea for reference.The main conclusions are as follows: the sewage treatment process used in Tongliao sewage treatment Plant is single, while the sewage treatment process adopted by individual sewage treatment plants is backward.In Tongliao City, the quantity of wastewater treatment is not up to the design standard (60%) the effluent quality, total nitrogen, total phosphorus and other important indexes are not up to the standard, and the sewage treatment rate is low. 2) the drainage direction of Tongliao sewage is mainly discharged directly into rivers and lakes.The sewage treatment process of constructed wetland is the most suitable for sewage treatment in Tongliao City, and the reclaimed water allocation is mainly for industrial reuse.The water quality planning after treatment in Chengliao area can meet the water demand in different aspects such as industrial water reuse, landscape greening and so on. It is feasible to set up a drainage area in Tongliao City, which can improve the utilization ratio of water resources and environmental protection in Tongliao City.Ecological construction has practical significance.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X703

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