Long-term Demonstration of 25 % Reduction in CO₂ Emissions using Bio-coke from Mixed Feedstock at Incineration Facilities

Abstract

Municipal waste incineration facilities in Japan often use gasification melting furnaces due to their high environmental performance and ash volume reduction. This project tests bio-coke made from various types of biomass, fed into a furnace for several months as a substitute for coal coke. Bio-coke is considered to be a carbon-neutral fuel and has been verified to reduce CO₂ emissions by at least 25 %, as compared to conventional fuel.
　The project aims to achieve four objectives : (1) steady collection of biomass in Yokote City, Akita Prefecture (mainly rice husks and bark, but their availability varies with harvest and snow seasons, respectively, so various types of biomass will be collected to provide a steady year-round supply of mixed feedstock); (2) development of effective and economic technology to produce bio-coke from mixed feedstock; (3) long-term demonstration of operations using bio-coke at Morioka/Shiwa District Environmental Facilities Association; and (4) investigation of the applicability of bio-coke from mixed feedstock in other industries.