电催化氧化处理海上平台生活污水

摘要

针对现有海上设施生活污水处理设备所采用的生化工艺存在处理效果不稳定、不能达到国际海事组织(IMO)MEPC.159(55)标准的污水处理要求等问题,采用电催化氧化工艺进行海上设施生活污水处理,考察了电流密度、温度和电导率对处理效果的影响.结果表明,电流密度对处理效果的影响较大,电导率次之,温度影响最小.在电流密度10 mA·cm-2、电导率15 mS·cm-1、温度10~35 ℃的条件下,电催化氧化处理效果较好,即进水COD 浓度600~980 mg·L-1、BOD5浓度200~400 mg·L-1经处理后,出水COD浓度降至100~115 mg·L-1、BOD5浓度降至10~15 mg·L-1,达到MEPC.159(55)及我国《海洋石油勘探开发污染物排放限制》(GB 4914-2008)标准要求.%Since the traditional treatment of biochemical wastewater is unstable and this process cannot meet the demand of IMO MEPC.159(55),an electrocatalytic oxidation process for domestic sewage treatment was explored.The effects of current density,temperature and conductivity on treatment efficiency were discussed.The results showed that,the current density had the most influence on the treatment efficiency,followed by conductivity,and temperature.When the current density was 10 mA·cm-2,the conductivity was 15 mS·cm-1 and the temperature was 10~35 ℃,eletrocatalytic oxidation had good treatment effect,namely,the concentration of COD and BOD5 of influent were 600~980 mg·L-1 and 200~400 mg·L-1,after treatment,the concentration of COD and BOD5 of effluent were 100~115 mg·L-1 and 10~15 mg·L-1,which met the requirements of MEPC.159(55) and the standard "pollutant emission limits for offshore petroleum exploration and development" (GB 4914-2008).