METAWATER

Sludge treatment solutions in sewage sector

Wastewater sludge gasification power generation system

Outline

The wastewater sludge gasification power generation system is used to achieve high-efficiency power generation by recovering combustible components of sludge as useful gas mainly comprised of H2 and CO through gasification and modification reaction. Thus, emissions of greenhouse gases (N2O, CO2) can be drastically reduced.

Characteristics

High-efficiency use of energy

Through partial combustion using oxygen, the organic contents can be efficiently modified to a clean fuel gas, realizing high-efficiency power generation by gas engine power generation, etc. though small in scale.

Reduction of environmental impact

Because gasification and modification reactions are operated at high temperature in a reducing atmosphere, the system does not emit N2O, a gas known for its high global warming factor. Further, by realizing high-efficiency power generation, use of fossil fuels is drastically decreased.

Application in various bio-mass systems

Energy recovery with increased efficiency is possible, if bio-mass such as wood, etc. is mixed for gasification besides wastewater sludge.

Diversification of energy utilization mode

The fuel gas can be used in fuel cells and so forth besides being used for gas engines.

Wastewater sludge gasification power generation system

Example

Kiyose Water Reclamation Center (Bureau of Sewage, Tokyo)

The Bureau of Sewage (Tokyo), Tokyo Metropolitan Sewerage Service Corporation and METAWATER have conducted a demonstration test as a part of joint project in the Tobu Sludge Plant (Bureau of Sewage, Tokyo) and established a wastewater sludge gasification process.
As a consequence, this technology was adopted in the "Kiyose Water Reclamation Center Sludge Gasification Project." Since July 2010, a sludge gasification furnace has been in operation with a treatment scale capacity of 100 t/day and power output 150 kW.

  • Wastewater sludge gasification power generation system

    Sludge gasification
    furnace facility Full view
  • Wastewater sludge gasification power generation system

    Gasification furnace

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