二氧化氯用于油田注水系统杀菌的试验

在大庆油田采油厂废水处理回注站进行了二氧化氯杀菌试验,针对硫酸盐还原菌(SRB)、铁细菌(IB)、腐生菌(TGB)以及注水系统中的细菌,研究适宜的二氧化氯投加浓度。结果表明,二氧化氯对各种菌的杀灭效果差异显著,硫酸盐还原菌的杀灭效果最好,其次是腐生菌,铁细菌效果较差,适宜的投加浓度分别为30mg/L、40mg/L、50mg/L。腐蚀率随着二氧化氯投加浓度增加而增强,故确定注水系统中二氧化氯最佳投加浓度为40mg/L,二氧化氯杀菌总成本为0·35元/m3。腐蚀率低于企业标准,细菌与硫化物指标达到油田注水标准。

Study on sterilization of chlorine dioxide applied on oil field refilling water

Plant, Daqing Oil-Field, Daqing 163712, China) Abstract: Experiments to destroy the bacteria in water filling system such as the sulfate reducing bacteria(SRB), iron bacteria(IB) and total growth bacteria(TGB) by chlorine dioxide are conducted for best ClO_2 dosage at the wastewater station in The Fourth Oil Abstract Plant in Daqing Oil-Field. The experiment result shows that the sterilizing effect of ClO_2 varies evidently in that the sterilize effect to SBR is the highest, the second is TGB and the effect to IB is lower. The suitable ClO_2 doses are 30, 40 and 50 mg/L respectively. The corruption rate will increase with the increasing of ClO_2 concentration. According to the comprehensive consideration, the minimum ClO_2 dosing amount is determined to be 40 mg/L, the expense by chlorine dioxide processes will be RMB 0.35 Yuan per cubic meter of wastewater. The corruption rate is under the corporation standard and the number of bacteria and the concentration of sulfide are lower than the standard of oil field refilling water.