Research On Technology Transformation Of Sewage Works Of Amber Village In Hefei

Sewage Works of Amber Village in Hefei, which is applied to treating municipal sewage, is an auxiliary project of Amber Village. The treatment technology of Sewage Works whose treating capacity is 4000 tons per day is activated sludge process. Sewage Works of Amber Village was put into production in 1994. With the population increasing continuously and the catering trade developing swiftly, the concentration of the organic matter and the oil and fat is evidently higher than the design value. In the winter the polysaccharide substance that results from the effect that the oil and fat is degraded completely is assembled together in the oxidation ditch, so the phenomenon of sludge expansion takes place often, which brings about that the water quality cannot reach the standard constantly. In the summer the foams on the surface of the oxidation ditch, which are caused by the use of the detergent, not only leads to the difficulty of the production and operation but also influence the aerating capacity of the revolving scrubs. Consequently the quality of effluent from the sewage works declines obviously.According to the problems above, two schemes are proposed in the paper, that is a cavitation-pocket flotation tank or a hydrolysis(acidification) tank is constructed before the oxidation ditch, in order to improve the treatment effect. On the basis of analyses on the feasibility and technical economy, a scheme, which has the virtues that its treatment effect is in condition and its investment and operating cost is less, will be adopted.