垃圾渗滤液生物处理出水臭氧氧化的研究

Ozonation of landfill leachate treated by biological oxidation

对垃圾渗滤液生物处理出水进行了臭氧氧化的研究。研究表明,随着氧化时间的延长,CODCr去除率增大;在碱性条件下进行臭氧氧化,pH越高,CODCr去除效率越高。采用BOD5/CODCr来表征垃圾渗滤液的生物降解性,研究了臭氧氧化前后垃圾渗滤液生物处理出水的生物降解性变化规律,表明臭氧氧化可以提高垃圾渗滤液生物处理出水的生物降解性,但提高的幅度不大。通过色谱-质谱法(GC-MC)对臭氧氧化前后垃圾渗滤液的成分进行分析,结果表明,臭氧氧化前后废水中的主要成分没有发生变化,仍然为难降解物质;臭氧氧化使废水中的部分物质发生了结构上的变化,减少、消失和生成的物质多为可降解物质。

Effluents produced by biological oxidation was subsequently treated with ozone. The result indicates that the oxidizing efficiency improve along with ozonation. The higher the pH, the higher the oxidazing efficiency. The biodegradability measured by BOD5/CODCr was studied during the ozonation of leachate treated by biodegrade treatment. It was illustrated that the biodegradability has little improvement after ozonation. The composition of the leachate was analyzed by GC-MC. It was shown that the major composition of the wastewater have no change after ozonation, which are biorefractory organics. Most of the materials, vanished, reduced or generated during ozonation, were proved as biodegradable organics.