1. 1) The Ministry of the Environment, Waste Management and Recycling Department: Waste management in Japan, p.1, 2008.
2. 2) The Ministry of the Environment, Waste Management and Recycling Department: Generation and disposal of industrial waste in 2008, 2008.
3. 3) The Ministry of the Environment, Waste Management and Recycling Department: The Establishing of industrial waste disposal facilities and the approbation industrial waste disposer in 2005, p.15, 2008.
4. Influence of gas residence time and air ratio on the air gasification of dried sewage sludge in a bubbling fluidised bed
5. Pyrolysis of sewage sludge in a fluidized bed