【摘要】：本文首先闡述了城市污水處理廠污泥處理與處置后評價工作的背景,然后選定西安市3座已運行的污水處理廠并以其污泥為研究對象,搜集項目可研和環(huán)評文件并結(jié)合實地調(diào)研結(jié)果,對比分析污水處理廠的進(jìn)出水水質(zhì)水量、污泥產(chǎn)量、污泥處理處置方式以及污泥處理處置費用等方面的預(yù)測與實際運營差異,獲得城市污水處理廠污泥處理與處置后評價結(jié)果,最終達(dá)到提高城市污水處理廠項目中從可研環(huán)評階段到運行管理階段對污泥處理處置的關(guān)注和重視。研究結(jié)果表明:城市污水處理廠項目的可研和環(huán)評階段普遍存在“重水輕泥”現(xiàn)象,對污泥處理處置的論述均過于簡單;雖然能較為準(zhǔn)確地預(yù)測污泥含水率,但由于影響污泥產(chǎn)量因素過多而且都存在預(yù)測的不準(zhǔn)確性,導(dǎo)致污泥產(chǎn)量預(yù)測值與實際值總是存在差距;同時缺少對污泥處理方式和處置去向經(jīng)濟(jì)合理性及技術(shù)可行性的論述,特別是對占有污水處理廠運行費用50-70%的污泥處理處置費用只字未提。因此,項目可研和環(huán)評階段埋下了污泥減量化、穩(wěn)定化、無害化和資源化無法實現(xiàn)的隱患,使得實際運營中污泥處理處置存在資金短缺、操作困難、處置路線不明確等一系列問題。此外,后評價還發(fā)現(xiàn)目前污泥處理率低的一個重要原因是污泥處理處置單位職責(zé)不明、政府缺乏有效監(jiān)管體系。
[Abstract]:In this paper, the background of sludge treatment and post-disposal evaluation in municipal wastewater treatment plant is described, and then three existing sewage treatment plants in Xi'an are selected and their sludge is taken as the research object. Collect the research and environmental assessment documents of the project and combine with the results of field investigation, compare and analyze the prediction and actual operation differences of the quality and quantity of the influent and effluent, the output of sludge, the mode of sludge treatment and disposal, and the cost of sludge treatment and disposal of the sewage treatment plant. The post-evaluation results of sludge treatment and disposal in municipal wastewater treatment plant are obtained, and finally, the attention and attention to sludge treatment and disposal in the project of municipal wastewater treatment plant from the stage of environmental assessment to the stage of operation and management is improved. The results show that the phenomenon of "heavy water and light mud" generally exists in the research and environmental assessment stage of municipal wastewater treatment plant project, and the discussion on sludge treatment and disposal is too simple. Although the moisture content of sludge can be predicted more accurately, there is always a gap between the predicted value of sludge yield and the actual value because of too many factors affecting sludge yield and inaccuracy of prediction. At the same time, there is a lack of discussion on the economic rationality and technical feasibility of sludge treatment method and disposal direction, especially the sludge treatment and disposal cost, which accounts for 50% of the operation cost of sewage treatment plant, is not mentioned at all. Therefore, the project research and environmental assessment stage buries the hidden dangers of sludge reduction, stabilization, innocuity and resource utilization, which makes the sludge treatment and disposal in actual operation lack of funds and difficult to operate. A series of problems, such as unclear disposal route, etc. In addition, the post-evaluation also found that one of the important reasons for the low sludge treatment rate is that the responsibilities of sludge treatment and disposal units are unknown and the government lacks an effective supervision system.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X703

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本文編號：2493319