摘要
文章采用电化学氧化法对特殊点源含油污水进行预处理,实验考察了电解时间、电极结构、电流密度对污染物去除效果的影响以及可生化性的改善情况,探究了电解过程中余氯、总氯变化情况,并对比了静置与活性炭吸附对余氯和总氯的去除情况。实验结果表明,以Ti/RuO 2-IrO 2板状电极为阳极、金属Ti板为阴极,当实验条件为电流密度80 A/m 2、电解120 min时,氨氮去除率达95.5%,COD去除率达56.7%,B/C值由0.19提高到0.33,此时对应的能耗为8.36(kW·h)/m 3;电解出水经活性炭吸附180 min后,余氯浓度降至0.97 mg/L,总氯浓度降至3.72 mg/L。
Through electrochemical oxidation method to pretreat oily wastewater with special source,this paper studied the effects of reaction time,electrode structure and current density on the removal of pollutants and the improvement of biodegradability.Besides,the changes of residual chlorine and total chlorine were investigated,following with the comparation of residual chlorine and total chlorine removal rate by static and activated carbon adsorption.Results showed that the removal rates of ammonia nitrogen and COD was 95.5%and 56.7%,respectively,B/C value increased from 0.19 to 0.33,and the corresponding energy consumption was about 8.36 kW·h/m 3 under the reaction condition that the Ti/RuO 2-IrO 2 plate electrode used as the anode and the metal Ti plate as the cathode,the current density 80 A/m 2 and the electrolysis time 120 min.Moreover,after the electrolyzed effluent adsorbed on activated carbon for 180 min,the residual chlorine concentration decreased to 0.97 mg/L and the total chlorine concentration decreased to 3.72 mg/L,respectively.
作者
杨长生
Yang Changsheng(CNPC Chemical Plant of Fushun Petrochemical Company)
出处
《油气田环境保护》
CAS
2021年第4期32-36,共5页
Environmental Protection of Oil & Gas Fields
关键词
电化学氧化
氨氮
COD
余氯
总氯
可生化性
electrochemical oxidation
ammonia nitrogen
COD
residual chlorine
total chlorine
biodegradability
