47 液化DMEによる汚泥の超高効率脱水技術の開発(重質油(2),汚泥)

抄録

Liquefied DME was passed through 3.2 kg of sewage sludge cake (water content 78%) charged in the prototype test machine that we designed and developed. As a result, the water content of the sewage sludge sharply decreased to 30%. After dewatering, the color of the sewage sludge changed from black to gray, and had no odor. Following the successful experiment, we designed a process with an estimated dewatering capacity of 76 tons/day (114 tons/day of brown coal, 97 tons/day of sewage sludge), which is similar to the dewatering capacity of a commercial plant. As a result, dewatering with an input energy of 1100 kJ/kg-water, was shown to be theoretically possible below 50℃.