O3/Na2S2O8耦合体系处理垃圾渗滤液生化出水

为提高垃圾渗滤液生化出水的化学需氧量(chemical oxygen demand,COD)、色度以及氨氮的去除效率,在不同的臭氧通气量、过硫酸钠投加量、pH、反应时间等反应条件下,研究了臭氧过硫酸盐耦合体系对于垃圾渗滤液生化出水的氧化效果.实验结果表明:COD、色度和氨氮的去除率随着过硫酸盐、臭氧通气量、反应时间的增加而增大,并且溶液pH为10的环境更有利于用臭氧过硫酸盐体系氧化降解污染物,在臭氧通气量为0.8 g/h、过硫酸钠投加量为10 g/L、pH为10、反应时间为200 min的条件下,废水的COD、色度和氨氮的去除率分别达76.3%、92.0%和55.4%.相较于单一过硫酸盐氧化方式,在过硫酸盐氧化过程中加入臭氧,处理效果显著提高,臭氧氧化与过硫酸钠氧化产生了一定的协同效应.

Treatment of Landfill Leachate Biochemical Effluent Using O3 /Na2 S2 O8 Oxidation

To improve the removal efficiencies of chemical oxygen demand ( COD ) , chromaticity and ammonia nitrogen, different reaction conditions, such as O3 ventilation, Na2S2O8 dosage, pH and reaction time were researched by experiments. The experiment results show that the removal rates of COD, chromaticity, and ammonia nitrogen increase with the increase of O3 ventilation, Na2 S2 O8 dosage, pH value, and reaction time. Under the conditions of Ozone ventilation of 0. 8 g/h, Na2 S2 O8 dosage of 10 g/L, pH 10, and reaction time of 200 min, the removal rates of COD, color, and ammonia nitrogen removal attain 76. 3%, 92% and 55. 4%, respectively. The persulfate oxidation process added by O3 has better treatment efficiency on the landfill leachate biochemical effluent than that of single oxidation in the treatment. It suggests that a synergistic effect happens between the O3 oxidation and Na2 S2 O8 oxidation.