生物—臭氧氧化技术处理垃圾渗滤液

采用生物—臭氧氧化技术对垃圾渗滤液进行了研究.结果表明:生物处理可以去除垃圾渗滤液的CODCr;随着氧化时间的延长,去除率随之增大;在碱性条件下进行臭氧氧化,pH值越高,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.采用色谱-质谱法对臭氧氧化前后垃圾渗滤液成分进行分析,结果表明:臭氧氧化前后废水中的主要成分没有发生变化,这些物质多为长链烷烃;臭氧氧化使废水中的部分物质发生了结构上的变化,这些物质多为可降解物质.

OZONATION OF LANDFILL LEACHATE TREATED BY BIOLOGICAL OXIDATION

Effluents produced by biological oxidation was subsequently treated with ozone. The result indicates that CODcr of landfill leachate can be degraded by biological oxidation. The result of ozonation show that the oxidizing efficiency improve along with ozonation. The higher the pH, the higher the oxidazing efficiency. The biodegradability measured by BODs/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 analysised by GC-MC. It was shown that the major composition of the wastewater have almost no change after ozonation, which are long chain alkane. Most of the materials, vanished, reduced or generated during ozonation, were proved as biodegradable organics.