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News Release
03.23.2016

Completion of sludge fuel production facilities for the Kosei Sewerage Treatment Plant, Lake Biwa Regional Sewerage
Will contribute to reducing greenhouse gas emissions equivalent to about 3,800 ordinary households through the production of carbide by accepting dehydrated sludge from two wastewater treatment facilities

Metawater Co., Ltd. (Headquarters: Tokyo, Japan; President: Tomoyasu Kida; hereinafter referred to as “Metawater”) has been entrusted by Shiga Prefecture Lake Biwa Regional Sewerage with the “Kosei Sewerage Treatment Plant Sludge Fuel Production Business.” We are pleased to announce that construction of sludge fuel production facilities, which started in May 2013, has now been completed.
The project aims to recycle sewage sludge generated at the Kosei Sewerage Treatment Plant and the Otsu City Water Treatment Center as carbonized fuel. Metawater has been entrusted with the design, construction, and operation and maintenance of the facilities under a DBO scheme.
By recycling sewage sludge, which has been treated as industrial waste, as an energy resource, the new facilities will reduce annual CO2 emissions by about 11,651 tons (for about 3,800 ordinary households) compared to the existing incineration / sludge melting facilities.

Overview of Kosei Sewerage Treatment Plant Sludge Fuel Production Business

The project is designed to produce biomass fuel by carbonizing sewage sludge generated at the sludge fuel production facilities of the Kosei Sewerage Treatment Plant and Otsu City Water Treatment Center, and use the fuel at coal-fired thermal power plants and electric furnace (for steelmaking plants). This is the first fuel production business to be operated in Shiga Prefecture.
Through the project, Metawater will contribute to the sustainable development of the region, and expand the use of renewable energy with the aim of reducing greenhouse gas emissions.


Sludge fuel production facilities


Sewage sludge fuel (carbide)

Business Overview




Overview of Shiga Prefecture Lake Biwa Regional Sewerage Kosei Fuel Production Business

Location of sludge fuel production facilities
3-1-1 Noka, Otsu-shi, Shiga Prefecture (Kosei Sewerage Treatment Plant)
 
Project size
  • Sludge treatment capacity                                              80 t/day × 1 unit
  • Sludge treatment volume                                               21,500 t (about 80 t/day)
  • Sludge carbonized fuel production volume                     about 2,150 t (about 8t/day)
 
Project scope
  1. Design and construction of sludge fuel production facilities
  2. Operation and maintenance of sludge fuel production facilities
  3. Purchase, transportation, and sale of sewage sludge carbonized fuel (carbide) produced
 
Project duration
  1. Design and construction of facilities: From March 2013 to March 2016
  2. Operation and maintenance of facilities: From January 2016 to March 2036 (20 years and 3 months)
 
Contract amount
5,051,740,785 yen (excluding tax)
*Including initial contract amount, design and construction of facilities, and 20-year period of operation and maintenance

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