Study on treatment of tertiary oil recovery wastewater by moving-bed bioreactor and O3/UV/H2O2

PETR 125

Guangmeng Ren, sdzlab@126.com, No.3 Branch of No. 1 Oil Recovery Plant, No.3 Branch of No. 1 Oil Recovery Plant, Daqing Oilfield, Daqing, 163000, China, Dezhi Sun, sdzlab@126.com, Department of Environment Engineering, Harbin Institute of Technology, Harbin, 150009, China, and Lijiang Hu, Department of Applied Chemistry, Harbin Institute of Technology, Box 713, Harbin, 150001, China.
The moving-bed bioreactor (MBBR) and O3/UV/H2O2 Process was coupled to treat tertiary oil recovery wastewater (TORW). Biodegradable organics, such as oil, can be effectively removed by MBBR, which can reduce organic-loading of the following process. Residual refractory organics, such as high molecular weight polymer, can be oxidized by pO3/UV/H2O2rocess. A COD reduction from 326.15mg/L to about 200mg/L was achieved by MBBR for 9 hours. And COD in the effluent was reduced to 92.35mg/L for treating further by O3/UV/H2O2process for 180 minutes, which can meet the requirement of the First Level of State Discharge Standard.