臭氧化技术在垃圾渗滤液深度处理中的应用研究

摘要

Ozone oxidation is employed to conduct advanced treatment for landfill leachate rejected from biochemical process and the effects of reaction time ,dosing rate of ozone ,pH and temperature on removals of COD ,protein ,polysaccharide ,color and humic substances are investigated .Moreover ,the changes of BOD/COD are studied to analyze the biodegradability of the tailwater .The results show that ,in conditions of pH value 5 .0 ,temperature 35℃ ,Ozone dose rate 9 .33 mg/(L·min ) , reaction time 120 min ,the removal efficiencies of COD ,protein ,color and humic substances can reach 56 .2% ,90 .5% , 97 .5% and 93 .0% respectively .The ratio of BOD/COD increases from 0 .32 to 0 .56 and the biodegradability of landfill leachate is largely improved .%采用臭氧氧化法对生化处理后的垃圾渗滤液进行深度处理，考察了反应时间、臭氧投加速率、pH和温度对COD、蛋白质、色度以及生化尾水中的腐殖酸的去除效果，通过BOD／COD变化分析了臭氧氧化法对生化尾水可生化性的提高作用。结果表明：在pH 5．0，温度35℃，臭氧投加速率9．33 mg／（L·min ），反应120 min的条件下，垃圾渗滤液的生化尾水中的COD、蛋白质、色度以及腐殖酸的去除率分别达到56．2％、90．5％、97．5％和93．0％，BOD／COD从0．32提升到0．56，生化性有了很大提高。