污水厂污泥产率随季节变化研究

污泥产量可根据经验污泥产率和污水处理量测算,但由于进水水质变化,运行控制不同,同一污水厂的污泥产率会因季节更迭而有所不同.通过对杭州市四座典型污水处理厂的调研研究,先分析了污泥产率随季节变化的规律,然后从进水COD浓度、SS浓度以及运行水温三个角度深入探究了污泥产率的具体影响因素,结果表明:各污水厂春季污泥产率高于其他...

Research of Sludge Yield in WWTP with Seasonal Variation

Based on the investigation of four typical municipal sewage plants in Hangzhou, this paper analyzes the seasonal variation of sludge yield at first, and then explores the specific influencing factors of sludge yield from three aspects of influent COD concentration, influent SS concentration and operating water temperature . Results shows that the sludge yield in spring is higher than the other three seasons, and the sludge yield has a great correlation with the influent COD concentration, the sludge yield increased with the increasing of COD concentratio. There is a certain correlation between sludge yield and SS concentration. Higher SS concentration in influent water leads to higher sludge yield. Higher water temperature in summer resulted in a faster growth rate of microorganisms, which was limited by substrate concentration and a larger decay coefficient, which was one of the reasons for the lower sludge yield in summer compared with other seasons.