中文摘要：

利用臭氧预氧化改善废水的可生化性,达到提高后续生物活性炭的效率的目的.采用排阻色谱法测定不同臭氧消耗量下有机物的不同相对分子质量的组分变化,试验结果表明：臭氧氧化作用可以有效地将部分大、中分子的有机物转化成中、小分子的有机物;同时,将一部分小分子有机物去除,提高水中有机物的可生化性,有助于减少后续处理的负荷和提高生物处理的效果.通过臭氧批量试验,同时考虑到经济因素和残余尾气的毒性,确定了不同季节的最佳臭氧消耗量为：冬季7.0 mg/L,春季6.7 mg/L,夏季5.2 mg/L,秋季6.0 mg/L.

英文摘要：

For higher treatment efficiency of BAC, biological degradability of wastewater was improved by pre-ozonation. The apparent molecular weight variations of organic matter after treatment by different ozone dosage were measured by Size-Exclusion Chromatography. The results showed that a part of high or middle- molecular-weight organic matters were transformed to some middle or lower ones and some of low-molecular-weight matters were removed by pre-ozonation. So pre-ozonation improved the biodegradability of wastewater and lessened load and helped to the further biological treatment. Considering batch experiments of ozone dosage, and the economic and toxicity of the off-gas, the optimum ozone dosages of different seasons were determined as follows： 7.0 mg/L in winter, 6.7 mg/L in spring, 5.2 mg/L in summer and 6.0 mg/L in autumn respectively.