Vol. 51 No. 3 (2014)   Machinery, Equipment & Infrastructure
Technical Papers

New-type Sludge Dryer for High Viscosity Sludge

TOMOMICHI EGUSA
KOUKI ENDOU
HIROHIKO KAIDA
NAOKI MATSUDERA
SHIGEKI ODAKA
RYOSUKE MORI

Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. is engaged in the development, design/production, installation and after-sales service/operation management of facilities to treat or dispose of waste including municipal refuse and sewage sludge. In recent years, sludge is required to be reduced in volume, both domestically and abroad, because of an increase in sludge discharge quantity with the sophistication of social economic activities, as well as due to final landfill site stringency. The characteristics of sludge are also diversifying and accordingly we developed a new-type sludge dryer that can dry even hard-to-dry high viscosity sludge appropriately and stably to be recycled as a means to reduce the amount of sanitary landfill for disposal through volume reduction. This paper outlines our efforts to develop a sludge dryer suitable for the diversified characteristics of sludge such as higher viscosity, and then describes the operation results of its demonstration plants.