【摘要】 针对南方地区存在季节性高氨氮和有机物污染的水源水,采用叠式曝气生物滤池进行生物预处理。枯水期水温≥5℃,滤速为8m/h,气水比为0.5～1.5,原水氨氮、CODMn和浊度的周均值分别为5.02～9.45mg/L、5.79～10.1mg/L和19.7～63.1NTU,叠式滤池出水对应指标分别为0.30～0.96mg/L、3.24～5.85mg/L和3.83～19.9NTU(去除率分别为90.3%、42.7%和66.3%),符合《地表水环境质量标准》(GB3838—2002)的Ⅲ类标准。丰水期滤速为12m/h,气水比为0.3～0.5,原水氨氮、CODMn和浊度的周均值分别为2.19～3.41mg/L、5.30～7.56mg/L和27.3～40.1NTU,叠式滤池出水对应指标分别为0.18～0.41mg/L、2.87～4.50mg/L和5.43～16.8NTU(去除率平均为89.3%、40.2%和65.0%),符合GB3838—2002的Ⅱ类标准。初滤池去除了原水中大部分可滤SS,为曝气生物滤池的稳定运行创造了条件,同时使曝气生物滤池过滤水头损失的24h变化量不超过2kPa,满足了多座滤池共用鼓风曝气系统,实现均匀曝气对过滤水头损失的控制要求。叠式曝气生物滤池的工艺投资约为140～180元/m3,运行费用约为0.05～0.07元/m3。更多还原

【Abstract】 According to the seasonal high ammonia nitrogen and organic pollution in raw water in subtropics,D-UBAF was used for its pretreatment. In low flow period,the temperature of raw water is above 5 ℃,filtration rate is 8 m/h,and gas-water ratio is 0.5 to 1.5. When the weekly average concentrations of NH3-N,CODMn and turbidity of raw water are 5.02 to 9.45 mg/L,5.79 to 10.1 mg/L and 19.7 to 63.1 NTU,the corresponding indexes of the treated water from D-UBAF are 0.30 to 0.96 mg/L,3.24 to 5.85 mg/L and 3.83 to 19.9 NTU,and the removal rates are 90.3%,42.7% and 66.3% respectively,which meet the Ⅲ criteria specified in Environmental Quality Standards for Surface Water (GB 3838-2002). In high flow period,the operating parameters are filtration rate of 12 m/h and gas-water ratio of 0.3 to 0.5. When the weekly average concentrations of NH3-N,CODMn and turbidity of raw water are 2.19 to 3.41 mg/L,5.30 to 7.56 mg/L and 27.3 to 40.1 NTU,the corresponding indexes of the treated water from D-UBAF are 0.18 to 0.41 mg/L,2.87 to 4.50 mg/L and 5.43 to 16.8 NTU,and the removal rates are 89.3%,40.2% and 65.0% respectively,which meet the Ⅱcriteria specified in Environmental Quality Standards for Surface Water (GB 3838-2002). In the DBAF of the D-UBAF system,the majority of filterable suspended solids in raw water can be removed,which can create the essential condition for the UBAF stable operation,and the variable quantity of filtering head of UBAF is no more than 2 kPa after filtration for 24 h. It also meets the requirement of head loss control for even aeration by multiple D-UBAFs who share a diffused aeration system. The process investment of D-UBAF is about 140 to 180 yuan/m3 and the operation cost is about 0.05 to 0.07 yuan/m3.更多还原