铁炭微电解-Fenton联用对沼液COD的去除效果

COD Removal Efficiency of Iron Carbon Micro Electrolysis and Fenton Reagent Combination System on Biogas Slurry

为探明炭微电解法-Fenton联用对猪场沼液化学需氧量(COD)去除的反应机理和影响因素,并确定此工艺的最佳运行参数,为今后的工程应用、设计和运营操作提供参考,进行了铁炭微电解-Fenton联用对沼液COD的去除效果试验。结果表明:在铁炭微电解最佳运行条件温度为(20±1)℃,铁炭质量比为1∶1,pH为3,反应时间为120min处理猪场沼液后,联用Fenton法预处理猪场沼液,当温度为(20±1)℃时,以H2O2/Fe2+为10∶1,pH为3,反应时间为45min的去除效果最好,COD去除率达75.95%。

In order to explore the reaction mechanism and influencing factors of iron carbon micro electrolysis and Fenton reagent combination system on removing COD of biogas slurry in pig farm,and confirm the optimum operating parameters and provide references for engineering application,design and operation,a COD removal test was conducted by using this combination system.Results：The optimum operating conditions of iron carbon micro electrolysis were as follows：temperature （20±1）℃,mass ratio of iron and carbon 1∶1,pH 3 and reaction time 120 min,the removal efficiency of biogas slurry by Fenton method reached the best under following conditions：temperature （20± 1）℃,H 2 O2/Fe2＋ 10 ∶ 1,pH 3 and reaction time 45 min,COD removal efficiency was up to 75.95%.