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中文摘要：
村镇垃圾中转站渗滤液具有量小、分散、污染性强等特点.为控制其有机污染,本研究采用操作灵活、高效的臭氧法处理该渗滤液,考察了反应时间、臭氧投量、初始pH值、反应温度、双氧水投量对渗滤液中有机污染物降解的影响.结果表明：当反应时间为20 min、臭氧投量为1.24g·h^-1、初始pH值为7.00、反应温度为25℃时,渗滤液色度（CN）和CODCr的去除率分别达83.57%、61.53%;在上述条件下,额外向反应体系中投入1 m L·L^-1双氧水后,其色度、CODCr去除率分别提高了4.88%、14.23%.由于村镇渗滤液中大分子有机物的降解,反应60 min后BOD5/CODCr值从0.24提高到0.56,且由于矿化作用,HCO3^-浓度增加了1297.89 mg·L^-1.此外,紫外-可见光谱显示,臭氧能明显降低渗滤液的芳香性程度和腐殖化程度;三维荧光光谱表明,臭氧能快速氧化渗滤液中结构较为稳定的类富里酸,极大程度地降低渗滤液中有机污染物的分子缩合度和分子量.经估算,反应过程中药剂成本约7.37元·m^-3.
英文摘要：
Leachate of rural waste transfer station is featured with small quantity,wide decentralization and severe pollution. To control its organic pollution,leachate was treated with easy-to-handle and efficient ozone system in this study. Five influencing factors including reaction time,ozone dosage,initial pH value,reaction temperature and H2O2 dosage were investigated. At 20 min of reaction time,1.24 g·h^-1of ozone,7.00 of initial pH and 25 ℃,the removal efficiencies of color CN and CODCrachieved 83.57% and 61.53%,respectively. In contrast,the removal efficiencies were improved by 4.88%and 14.23% by the addition of 1 mL·L^-1H2O2 to the reaction system. After ozonation,the ratio of BOD5/ CODCrwas increased from 0. 24 to 0. 56,because of decomposition of the refractory organics. Moreover,the concentration of HCO3^-was increased by about 1297.89 mg·L^-1,due to mineralization of the organics. UV-Vis spectra analysis indicated that the aromatic matters and humic of the leachate were greatly deceased by ozone. Results of 3D-EEM spectra analysis showed that ozone could quickly oxidize the structurally stable fluvic acid-like organic matter in the leachate. And the molecular condensation degree and molecular weight were reduced significantly. In estimation,the dosage cost was about 7.37 yuan·m^-3.
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