Fe/C微电解-Fenton组合工艺处理丁腈橡胶废水

采用Fe/C微电解-Fenton组合工艺处理某石化企业丁腈橡胶废水,考察了单纯微电解单元和Fenton法单元处理废水的主要影响因素,在此基础上对组合工艺进行了条件优化以及处理效果验证。结果表明,在微电解单元,Fe/C(质量比)为3/1、初始pH值为2.00～10.00、反应时间为1 h;在Fenton法单元,氧化剂H2 O2投加量为2.0 mL/L、催化剂Fe2+投加量为0.2 g/L、反应温度为40℃以及反应时间为45 min的条件下,丁腈橡胶废水中化学需氧量的总去除率达50.00%以上,丙烯腈的总去除率达95%以上。与单纯Fenton法相比,要达到同样的处理效果,使用组合工艺,H2O2投加量由3.0 mL/L降至2.0 mL/L,Fe2+的投加量由0.6 g/L降至0.2 g/L。

Treatment of nitrile rubber wastewater by Fe/C microelectrolysis-Fenton combined process

The nitrile rubber wastewater from some petrochemical enterprise was treated by microelectrolysis-Fenton combined process.The main influencing factors of microelectrolysis and Fenton processes were investigated respectively,and on this basis,the processing conditions were optimized and treatment effect was verified for the combined process.The results showed that when the combined process was used to treat the wastewater,the total removal rates of chemical oxygen demand and acrylonitrile were more than 50.00% and 95% respectively under the condition of Fe/C(mass ratio) 3/1,initial pH value 2.00-10.00,reaction time 1 h for microelectrolysis;the concentrations in NBR wastewater of oxidant H2O2 and catalyst Fe2+ 2.0 mL/L,0.2 g/L respectively,reaction temperature 40 ℃ and reaction time 45 min for Fenton process.Compared to single Fenton process with same treatment results,the combined process could decrease H2O2 from 3.0 mL/L to 2.0 mL/L,and Fe2+ from 0.6 g/L to 0.2 g/L.