Ken-ichi Shishida*, Hiroto Haruki*, Keiichi Kamio*, Harumi Yamada**, Koji Kosaka** and Saburo Matsui**

* Takuma Co. Ltd.
** Kyoto University

+ Correspondence should be addressed to Ken-ichi Shishida:
(2-2-33 kinrakuji-cho amagasaki-city Hyogo 661-0806 Japan)

Abstract

In this study, we examined three advanced oxidation processes and compared their performances in the treatment of landfill leachate. The ozone/hydrogen peroxide process, the ozone/ultraviolet process, and the hydrogen peroxide/ultraviolet process were examined. The results we found were that the ozone/hydrogen peroxide process and the ozone/ultraviolet process were effective in decreasing the COD, TOC and colour, and also in the degradation of micropollutants. The hydrogen peroxide/ultraviolet process was not effective in the decrease of COD and TOC, but it was effective in the degradation of micropollutants. The ozone/hydrogen peroxide process showed a higher performance in the decomposition of tris (2-chloroethyl) phosphate than the ultraviolet processes.

Key words: landfill leachate, advanced oxidation processes, ozone/hydrogen peroxide process, ozone/ultraviolet process, hydrogen peroxide/ultraviolet process