Quick Startup of Microaerophilic EGSB Reactor for Simultaneous Removal of Carbon and Nutrients (N and P) Treating Actual Domestic Sewage under Ambient Temperature
To obtain the rapid startup of a microaerophilic EGSB reactor for simultaneous removal of carbon and nutrients (N and P) treating actual domestic sewage under ambient temperature, the EGSB were operated for approximately 5 months (consist of startup stage and stable operation stage) for the forming of micro-aerobic granules at ambient temperature (15-26 ℃). By controlling the oxygenation rate in the aeration column, different concentrations of dissolved O2 were generated in the recirculated fluid which supplied dissolved O2 to the granule sludge bed in the EGSB reactor and to generate microaerophilic environments. The results showed that it took only four months for the successful startup of the microaerophilic EGSB for the treatment of actual domestic sewage under ambient temperature. About 4 months startup operation and 1 month stable operation, the microaerophilic EGSB reactor treating actual domestic wastewater at ambient temperature (15-26 ℃) run well. With 88-952 mg.L-1, 25-72 mg.L-1, 33-89 mg.L-1, and 1.7- 18.5 mg.L-1 influent COD, NH3-N, TN, and TP concentrations, gradually increasing influent flow from 1.2 L.h-1 to 2.5L.h-1 and shortening HRT from 10h to 4.8h, the average removal of COD, NH3-N, TN and TP could attain 93%, 79%, 70% and 36% regardless influent fluctuate. At the stable operation stages the settled velocity of the granules decreased to 15m.h-1, the low COD concentration, low temperature, and micro-oxygen addition were the dominating factors. But the granules were still hold in the EGSB reactor without any washout, which meant the successful startup for the microaerophilic EGSB reactor.
EGSB reactor actual domestic wastewater ambient temperature startup simultaneous removal of carbon and nutrients
DONG Chunjuan WANG Haihui LIU Xiao WANG Yanxia ZHAO Qingliang LU Bingnan
Department of Environmental Engineering,Taiyuan University,Taiyuan 030009,Shanxi,China School of Mun Department of Environmental Engineering,Taiyuan University,Taiyuan 030009,Shanxi,China School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,Henlo
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1538-1541
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）