ABSTRACT
The production of sludges from various waste water increases and the cost of their treatment constitutes more than half of the cost of the general treatment of waste water. One cost effective treatment of sludges is land-fill. But, areas for land-fill are limited in Korea and underground water pollution if induces is worrisome. Thus, the incineration of sludges is being increased. Proper incinerators generally reduce the volume of the sludges by 90%. However, sludge incineration generates a large amount of ashes. In our province in Korea, the amount of sludges generated annually was 373,000 metric tons in 1990. More than 2/3 of those were generated by paper industries. The most of part of the paper industries in Chonlabuckdo are incinerating sludges. Thus, The use of the ashes from the paper sludges is necessary and attracting the attentions of researchers.
