Wastewater sludge gasification power generation system
Outline
The wastewater sludge gasification power generation system recovers, through gasification and modification reaction, combustible components of sludge as useful gas primarily composed of H2 and CO for use in high-efficiency power generation. This process results in the emission of greenhouse gases (N2O, CO2) being drastically reduced.
Features
High-efficiency use of energy
Through partial combustion taking place through the use of oxygen, organic components are efficiently modified into a clean fuel gas, realizing high-efficiency power generation as a result of gas engine power generation, etc. despite any smallness in terms of the scale.
Reduced impact on the environment
Since gasification and modification reactions are conducted at high temperatures in a reducing atmosphere, the system does not emit N2O, a gas known for its high global warming factor. Furthermore, realizing high-efficiency power generation means that the use of fossil fuels is significantly decreased.
Application within various bio-mass systems
By mixing bio-mass (besides wastewater sludge) such as wood for gasification, energy may be recovered even more efficiently.
Diversification in the utilization of energy
The fuel gases are applicable to fuel cells and so forth, not just gas engines.
Example of implementation
Kiyose Water Reclamation Center (Bureau of Sewage, Tokyo)
Bureau of Sewage (Tokyo), Tokyo Metropolitan Sewerage Service Corporation and METAWATER conducted demonstration tests as a part of joint project for the Tobu Sludge Plant (Bureau of Sewage, Tokyo) and established a wastewater sludge gasification process.
As a result, this technology was adopted during the Kiyose Water Reclamation Center Sludge Gasification Project. In July 2010, a sludge gasification furnace was put into operation with a treatment capacity of 100 t/day and a power generation output of 150 kW.
