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针对聚合物驱采油污水黏度大、含油乳化程度高、油水分离困难且可生化性差的特点,采用电解联合光电催化组合工艺对其进行了深度处理并考察了其影响因素。结果表明,停留时间、废水p H、电流密度对电解及光电催化单元有一定的影响,温度无明显影响;温度10~40℃时,在电解单元废水初始p H=5、电流密度30 m A/cm2、停留时间12 min,光电催化单元电流密度8 m A/cm~2、停留时间40 min的优化条件下,进水COD为350~450 mg/L、石油类的质量浓度25~30 mg/L时,出水COD、油类的质量浓度含量分别为40~55mg/L、0.8~1.4 mg/L,满足DB 37/676-2007的要求。
Aiming at the characteristics of polymer flooding wastewater with high viscosity, high degree of oil emulsification, difficult oil-water separation and poor biodegradability, the electrolysis combined with photoelectrocatalysis was used to deeply process and investigate the influencing factors. The results showed that the residence time, p H and the current density of the wastewater had a certain influence on the electrolysis and the photoelectrocatalytic unit, but had no significant effect on the temperature. When the temperature was 10-40 ℃, the initial p H = 5, the current density 30 m A / cm2, residence time 12 min, photocurrent density 8 m A / cm ~ 2 and residence time 40 min, the influent COD was 350-450 mg / L and the petroleum concentration was 25-30 mg / L, effluent COD, oil mass concentration of 40 ~ 55mg / L, respectively, 0.8 ~ 1.4 mg / L, to meet the requirements of DB 37 / 676-2007.