Paper

Air Flow Rate in Leachate Collection Pipe of Semi-Aerobic Landfills; The Case of a Single Pipe
Youngkyu Kim, Toshihiko Matsuto, Yasumasa Tojo and Nobutoshi Tanaka 129

Recycling of Paper Resources and Paper Waste Treatment
--Preliminary Resources, Cost and Energy Analysis of Waste Paper Recycling--
Shinsuke Morisawa, Takeshi Hasegawa and Yoriteru Inoue 139

A Study on Pb in Fly Ash from a General Waste Incineration Plant and the Leaching Characteristic of Pb from a Landfill
Nobuo Hasegawa 149

Effects of Pretreatment on the Solubilization and Anaerobic Digestion of Waste Activated Sludge
Qun-hui Wang, Kohji Kakimoto, Hiroaki I. Ogawa, Kazuhiro Fujisaki and Yasuhiko Kato 157abst