污水厂污泥产率随季节变化研究

Research of Sludge Yield in WWTP with Seasonal Variation

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三个季节,夏季和秋季(6月至11月)污泥产率相对较低;污泥产率与进水COD有较大相关性,且随着进水COD值的增大而增加;进水SS浓度高时,污泥产率相应较高.

Sludge yield can be calculated by the empirical sludge yield and sewage treatment volume.Due to the change of influent quality and the difference of operation control,the sludge yield of the same WWTP will be different with the seasonal variation.By the investigation,survey and study of four typical wastewater treatment plants(WWTP)in in Hangzhou,the rule of sludge yield with the seasonal variation is analyzed at first,and then the specific influencing factors on the sludge yield are further explored from three aspects of influent COD concentration,influent SS concentration and operating water temperature.Research results show that the sludge yield in spring of WWTPs is higher than in the other three seasons,and the sludge yields in summer and autumn are relatively lower.There is a great correlation between sludge yield and influent COD.The sludge yield increases with the increment of COD value.When the influent SS concentration is high,the sludge yield is relatively higher.