铁离子循环电解法处理垃圾填埋场晚期渗滤液

使用箱式电化学反应器,采用铁离子循环电解工艺处理垃圾填埋场晚期渗滤液,确定了硫酸铁的剂量,考察了该工艺去除污染物的效率与主要因子对污染物去除的影响.实验结果表明,铁离子循环电解工艺对垃圾填埋场晚期渗滤液具有良好的处理效果,在电压3.80V、pH值为3.0、电解时间40min条件下,电解后的渗滤液满足二级排放标准的要求;硫酸铁的合理浓度为1000mg·L-1;电解电压不宜超过4.0V,电解时间不宜超过40min;渗滤液中氯离子的浓度对COD和NH 4-N的去除有显著影响,浓度越高COD和NH 4-N去除效果越好,且其对NH 4-N去除的影响大于对COD去除的影响.

Treatment of late-period landfill leachate by electrolysis with iron recycling

Late-period landfill leachate was treated by electrolysis with iron recycling in a box-style electrochemical reactor. The optimal dosage of Fe2(SO4)3 was determined and the contaminant removal efficiency was investigated under different conditions. The results showed that electrolysis with iron recycling is an effective treatment method. Under a voltage of 3.80V at pH 3.0, after 40 min of treatment, the water quality could meet the second discharge standard. The optimal dosage of Fe2(SO4)3 was 1000 mg·L-1, and the voltage and the electrolysis time were not more than 4.0 V and 40 min. The concentration of Cl- had a notable effect on COD and NH+4-N removal, and higher Cl- concentration was advantageous to COD and, especially, NH+4-N removal.