DO对A^2O工艺处理效果及运行能耗的影响  

Effect of DO Concentration on Treatment Efficiency and Energy Consumption of A^2O Process

作　　者：邵辉煌[1] 李艺[1] 郭玉梅 方先金[1] 吴毅晖 顾升波[1] 万太寅 唐思奇 

机构地区：[1]北京市市政工程设计研究总院有限公司,北京100082 [2]昆明滇池水务股份有限公司,云南昆明650228

出　　处：《中国给水排水》2015年第15期64-68,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2011ZX07302-001)

摘　　要：通过生产性试验,在五廊道好氧池的前两个廊道采取低曝措施,降低好氧池DO浓度,研究其对A2O工艺处理效果的影响。结果表明:在第1廊道进行低曝,前两个廊道DO浓度为0.12~0.45 mg/L,好氧池出水TN和COD浓度分别下降1.9和6.92 mg/L;在第1、2廊道进行低曝,前两个廊道DO浓度为0.11~0.28 mg/L,好氧池出水TN和COD浓度分别下降3.92、10.21mg/L。近1年的稳定运行结果表明,在好氧池的第1、2廊道低曝,能够有效提高污水厂出水水质,且没有发生污泥膨胀等异象。运行能耗分析表明,与好氧池DO浓度为2.0 mg/L相比,当DO浓度分别为0.6、0.3 mg/L时,可分别减少供气量为15.1%、18.7%。In full-scale test, the low-intensity aeration technology was applied in the front two galleries to reduce DO concentration in five-gallery aerobic tank. The effect of DO concentration on treatment efficiency and energy consumption of A^2O process was investigated. The results showed that when the low-intensity aeration technology was applied in the first gallery, the DO was 0.12 mg/L to 0.45 mg/ L in the front two galleries, and the effluent concentrations of TN and COD were decreased by 1.9 mg/L and 6.92 mg/L respectively. When the low-intensity aeration technology was applied in the front two galleries, the DO was 0.11 mg/L to 0.28 mg/L in the front two galleries, and the effluent concentrations of TN and COD were decreased by 3.92 mg/L and 10.21 mg/L respectively. The one-year steady operation results showed that when the low-intensity aeration technology was applied in the front two galleries, the effluent quality was improved and no sludge bulking occurred. Compared with DO of 2.0 mg/L in aerobic tank, the air supply volume could be reduced by 15.1% or 18.7% when DO was 0.6 mg/L or 0.3 mg/ L respectively.

关 键 词：溶解氧 A^2O工艺 低曝 氨氮 总氮 有机物 

分 类 号：X703[环境科学与工程—环境工程]