Diatomite strengthen COD and ammonia removal from an micro-aerobic EGSB reactor treating coking wastewater

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Dong, C.J.^1 ; Lv, B.N.^2

Department of Environmental Engineering, Taiyuan University, Taiyuan

030009, China^1

State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin

150001, China^2

关键词: Ammonia removal;    Coking wastewater;    EGSB reactor;    Hydraulic retention time;    Micro aerobics;    N removal;    Reactor systems;    Two-stage;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012075/pdf
DOI  :  10.1088/1755-1315/191/1/012075

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The performance of one-stage micro-aerobic MAEGSB (OMAEGSB) reactor and two-stage MAEGSB (TMAEGSB) reactor treating actual coking wastewater with and without supplement of diatomite were investigated. The investigation has demonstrated that the two-stage MAEGSB reactor system treating actual coking wastewater could keep high COD and NH3-N removal with supplement of diatomite. With only 24h hydraulic retention time (HRT) (12h for MAEGSB I and 12h for MAEGSB II ), when without diatomite supplement, the TMAEGSB reactor system could attain 72.6% COD average removal and 25.8% NH3-N average removal. However, with 6g•L-1•d-1 diatomite supplement, the TMAEGSB reactor system could keep 84.3% COD average removal and 78.8%-92.8% NH3-N average removal. Such high NH3-N removal efficiency of the TMEGSB was because of the high phenol and thiocyanate (SCN) removal in the MAEGSB I reactor (97.9% and 77.9%) and correspondingly the low influent phenol and SCN concentration for the MAEGSB II reactor (33.9 mg•L-1 and 10.4 mg•L-1). Diatomite supplement could ensure stable and highly efficient phenol and SCN removal in the MAEGSB I reactor. Using TMAEGSB reactor system with diatomite supplement was a simple and high effectively strategy for treatment of actual coking wastewater.