Yasushi Matsufuji* and Takayuki Simaoka*

* Faculty of Engineering, Fukuoka University

+ Correspondence should be addressed to Yasushi Matsufuji:
(8-19-1 Nanakuma, Jhonan-ku, Fukuoka 814-80 Japan)

Abstract

In the 1960's, problems such as high concentrations of BOD, COD and T-N, low pH and bad smell in the leachate were frequent in Japan's landfill sites due to the abundance of organic substances in waste. Nowadays, however, as the composition of landfill waste has changed, so have the problems. Because of the increase in incineration rate, landfill leachate usually contains a high concentration of salt, T-N, and synthetic and non-regulated substances. These changes have deeply affected landfill management and the environment. In this article we describe the mechanisms of salt outflow from landfills and propose approaches to for landfill construction.

Key words: leachate salt, landfill, leachate quality, incineration residue