Feasibility Research Of The Water Supply BOT Project In Xiajin County Shandong Province

Along with the economic development and the unceasing expansion scale of Xiajin County, the current status of water supply can't meet the requirement of the social and economic development. In order to accelerate the economic construction speed of Xiajin County, and ensure the sustainable development of regional economy, we decide to draw up a plan of constructing water purification plant which is located in north Xiajin reservoir, covers an area of 99.97 mu. The source of Xiajin reservoir is the Yellow River water which is the ideal water source.The water supply BOT project in Xiajin County mainly includes four parts: the water intake engineering, the water purification engineering, the water conveyance engineering, the water distribution engineering. According to the water supply prediction and calculation of the first and second phase water plant scale, Xiajin County decide to construct water treatment plant, the first period of the proposed plant scale is 50000m3/d, the second period is 100000m3/d.The only source meeting the engineering scale is Xiajin reservoir, which source is the Yellow River water. Through analyzing the water characteristics of reservoirs, we can identify the transformation ways of the water intake engineering, and try to get the raw water from the reservoir below the surface to about 1.5m layer. Under the premise of sufficient argumentation of the raw water quality, the treatment processes include dosing, mixing, sedimentation, flocculation, disinfection, sludge treatment are comparsion and selection fully. Then, the water treatment plant proposed the treatment process of higher safety and more suitable for local production management, which includes the tubular static mixer, folding reaction of advection precipitating, V type filter and sludge treatment process, and ensured the effluent quality effectively by chemical treatment method.After considering the engineering geology along the line, construction conditions and project on security and economy, the project design adopt GRP sand pipe, ductile iron pipe and PE pipe. After reference to water conveyance and distribution pipeline alignment principle, according to the water conveyance and distribution pipeline scheme selection, we select the water conveyance and distribution pipeline direction, and distribute pipe diameter according to the section of pipeline flow.After the completion of the project, the first period scale of the water supply BOT project in Xiajin County is 50000m3/d, the water quality is ensured, and the city water supply safety is improved. The total investment of the first period of project is 123.09 million, manufacturing capacity is 18.25 million m3/year, the average unit cost of water production is 0.596 yuan/m3.