Production of Biosolid Fuel from Sewage Sludge and Combustion Characteristics

Abstract

We have developed the sewage sludge drying and pelletizing process that transforms sewage into low water content (less than 10%) and spherical pellet. This report introduces the description of the sewage sludge drying and pelletizing process, quality of dried sludge pellets, the basic results of the co-firing test of dried sludge pellets with coal in pulverized coal-fired furnace and municipal solid waste incinerator. It is concluded that dried sludge pellets had low water content and about 1/2～2/3 of heat value of coal. Also, co-firing of dried pellet results in good operation in pulverized coal-fired furnace and municipal solid waste incinerator.