Effect And Economic Analysis Of Sewage Treatment In Shenzhen City

This thesis focus on the study of Binhe, Yantian, Luofang and Nanshan municipal sewage treatment plants located in Shenzhen. The treatment effect of six different urban domestic wastewater treatment processes is analyzed and evaluated. Economic situation about the investment, construction and operation of the four sewage enterprises is also studied in this thesis.Firstly, the thesis summarizes the development and advances in field of sewage treatment industry inside and outside our country. The current status of the domestic wastewater treatment technology and process is put forward. The background and significance is provided in addition.Then, the construction situations of Binhe, Yantian, Luofang and Nanshan sewage treatment plants in SSZ are introduced in the thesis. The treatment flow of the six processes adopted by the various phase projects of the four treatment plants is described in detail.Based on the work of sorting and checking the data collected from water quality daily reports of each treatment plant, the thesis compares and evaluates the six different treatment processes chiefly. From the four aspects, direct treatment effect, treatment ability, treatment stability and impact load resistance, the thesis quantitatively analyzes the treating effect of normal contamination removal (SS,BOD5,CODcr) and Nitrogen and Phosphorus removal (NH3-N,TN,TP). A level evaluation model of sewage treatment process is proposed, and the level integrated evaluation is performing.The construction scale, construction management, investment and cost is synthetically analyzed in the basis of the data and documents afforded by the four sewage treatment plants and correlative government departments. The treatment operation cost is divided into six cost items of energy cost, medicament cost, examine and repair cost, dredging and sludge disposal cost, management and other cost. Then the six cost items of various treatment plants are calculated and compared in the thesis, the treatment operation cost composition is analyzed in addition. Then a total cost formula of treatment plant special for sewage treatment industry in Shenzhen under BOT, TOT and commission management mode is proposed respectively, and the recommendation of the parameters determining and calculation method is brought forward. In the end, the study of this thesis is summarized and the research prospect of this study is presented.