OZONATION OF LANDFILL LEACHATE TREATED BY BIOLOGICAL OXIDATION
FENG Xu-dong, GAO Yu-lan, LIU Fang, GUO Ming-min(College of Chemical and Environmental Engineering, Beijing Technology and Bussiness University, Beijing 100037, China)
Effluents produced by biological oxidation was subsequently treated with ozone. The result indicates that COD_(Cr) 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 BOD_5/COD_(Cr) 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.