有机分离膜耦合高级氧化技术在浓盐有机废水中的应用研究

Application of Organic Separation Membrane Coupled Advanced Oxidation Technology to Organic Saline Wasterwater

本文研究了有机分离膜技术耦合高级氧化技术(臭氧及过氧化氢催化氧化)对煤制油有机浓盐水COD的去除效果。试验结果表明,采用臭氧直接氧化,控制臭氧投加量100 mg/L,最佳反应时间为120 min,COD去除率33.5%;120 min以后对剩余有机物进行臭氧+过氧化氢催化氧化COD几乎无变化。对比有机分离膜产水利用臭氧直接氧化,反应25 min,COD从490 mg/L下降至196 mg/L,去除率为60%;25 min后继续臭氧+过氧化氢催化氧化膜产水,COD从196 mg/L下降至52 mg/L,去除率为73.5%。有机分离膜耦合臭氧及催化氧化的反应速率分别为直接臭氧氧化和催化氧化速率的10.5、12.5倍,该耦合技术能够有效提高氧化速率。

This paper reports the COD removal efficiency of combination of membrane separation for organics followed by advanced oxidation technology(ozone oxidation and H_(2)O_(2) catalytic oxidation) in coal-to-oil organic concentrated brine.Results showed that,for direct ozone oxidation with a dose of 100 mg/L,the optimal reaction time was 120 min,and the COD removal efficiency was 33.5%.Further ozonation and H_(2)O_(2) catalytic oxidation could barely reduce the COD.While after membrane separation,with the same ozone dose,the optimal reaction time was reduced to 25 min,and the COD was reduced from 490 mg/L to 196 mg/L with a removal efficiency of 60%.Further ozonation and H_(2)O_(2) catalytic oxidation caused a decrease of COD from 196 mg/L to 52 mg/L with a removal efficiency of73.5%.After membrane filtration,reaction rate of ozonation and H_(2)O_(2) catalytic oxidation raised 10.5 times and 12.5 times,respectively,relative to bare ozonation and H_(2)O_(2) catalytic oxidation.