Nobutoshi Tanaka

Professor of Hokkaido University
(Nishi 8chome, Kita 13jo, Kita-ku, Sapporo, Hokkaido 060 Japan)

Abstract

Control of leachate in sanitary landfills presents a difficult problem. In Japan, the primary technique for leachate control is to quickly collect and drain all the leachate from landfill layer, and to let air flow steadily into the landfill layer. The technique can be carried out by designing reasonable leachate collectionpipe lines and a leachate adjustment pond. Dimensions and structure of the equipments were discussed on the basis of our inquiry to nationwide municipalities. Then, I pointed out that it is important to propagate the concept of semi-aerobic landfill more and more, and to develop a decision-making method of arrangement and dimensions of the pipelines as well as capacity of the adjustment pond.

Key words: leachate quantity, leachate quality, semi-aerobic, leachate adjustment pond, leachate collection and drainage pipes