Three controllable factors of steady operation of EGSB reactor  

作　　者：李慧莉 吕炳南 李芳 

机构地区：[1]School of Municipal and Environmental Engineering, Harbin Institute of Technology [2]School of Architecture Engineering, Daqing Petroleum Institute

出　　处：《Journal of Harbin Institute of Technology(New Series)》2008年第3期411-414,共4页哈尔滨工业大学学报（英文版）

基　　金：the National High Technology Research and Development Program of China(Grant No.2003AA601090).

摘　　要：The bench-scale EGSB (expanded granular sludge bed) reactor was operated to study the effect of sludge loading rate, pH value and nutrient element on the operation of the EGSB reactor and the control rule of these factors. Continuous flow was used to treat synthetic wastewater containing dextrose and beer, and the temperature of reactor was controlled at mesophiles temperature (33 ℃). The experimental results demonstrated that the proper sludge loading rate was 0.9-1.42 kg COD/(kg VSS·d); the pH value in the reactor was controlled by adding sodium bicarbonate, the proper additive quantity was 1000-1200 mg/L; the additive quantity of nutrient element was as follows: 41.3 mg/(SS·d) of FeCl2·4H2O, 4.3 mg/(SS·d) of CoCl2·6H2O, 8.2 mg/(SS·d) of NiCl2·6H2O, 7.5-13 mg/(SS·d) of CaCO3,and 56.7-22.7 mg/(SS·d) of 7Na2S·9H2O, respectively. When these parameters were properly determined, the EGSB reactor could treat wastewater with 400-5000 mg/L COD concentration. The COD removal efficiency was over 85%. The operation of the EGSB reactor was steady and the EGSB reactor had strong anti-shock load ability.The bench-scale EGSB （expanded granular sludge bed） reactor was operated to study the effect of sludge loading rate, pH value and nutrient element on the operation of the EGSB reactor and the control rule of these factors. Continuous flow was used to treat synthetic wastewater containing dextrose and beer, and the tem- perature of reactor was controlled at mesophiles temperature （33 ℃ ）. The experimental results demonstrated that the proper sludge loading rate was 0. 9 - 1.42 kg COD/（ kg VSS · d） ; the pH value in the reactor was controlled by adding sodium bicarbonate, the proper additive quantity was 1000 - 1200 mg/L; the additive quantity of nutrient element was as follows： 41.3 mg/（SS· d） of FeCl2 · 4H2O, 4. 3 mg/（SS · d） of CoCl2 · 6H2O, 8. 2 mg/（SS ·d） of NiCl2 ·6H2O, 7. 5- 13 mg/（ SS· d） of CaCO3 ,and 56. 7 -22. 7 mg/（SS ·d） of 7Na2S · 9H2O, respectively. When these parameters were properly determined, the EGSB reactor could treat wastewater with 400 -5000 mg/L COD concentration. The COD removal efficiency was over 85%. The operation of the EGSB reactor was steady and the EGSB reactor had strong anti-shock load ability.

关 键 词：EGSB reactor organic loading rate pH value nutrient element 

分 类 号：X703.1[环境科学与工程—环境工程]