Japan’s first system to produce biomass fuel from dehydrate sludge with the help of the low-temperature carbonization technology has been completed. Three companies of J-Power, Tsukishima Kikai, and Metawater jointly constructed system in Hiroshima city. The constituent includes sludge dryer, carbonizing furnace, and granulator. The system will start operation soon in April. A total cost including the construction cost and the 20-year operating cost is about 9,300 million yen.
The system has a capacity to treat 4,500 tons of sludge annually, 46% of total sludges generated in Hiroshima city in a year. With the completion of the system, the city will reduce carbon dioxide emissions 8,700 tons annually. In addition, decreased fossil fuel consumption will reduce carbon dioxide emissions 6,400 tons annually, making the total reduction of carbon dioxide emissions 15,100 tons annually. The system decreases the carbonization temperature to 250-300 degrees centigrade that is from half to one-third of the temperature of the conventional carbonization technology. The low carbonization temperature enables carbide to realize high calorific value, increasing the value of the generated biomass fuel. Granulation in the pre-carbonization stage makes the spontaneous combustibility low. The fuel to be produced will be sold and mixed with coal fuel.
A biomass production plant