WELTEC Biomass commissions 450-kW Cogeneration Power Plant in Japan

March 1, 2022
The facility makes use of organic leftovers, such as farm waste, as raw material for the biogas output, while the plant generates both electricity and heat or steam for industrial processes

German-based biomass power builder WELTEC Biopower has commissioned a 450-kW cogeneration plant in Japan.

The biogas facility is located and operating in Saitama Prefecture north of Tokyo. The facility makes use of organic leftovers, such as farm waste, as raw material for the biogas output, while this type of plant generates both electricity and heat or steam for industrial processes and district heating, in some cases.

The Saitama project is the fourth completed by WELTEC in Japan. The plant will use close to 12,000 metric tons of organic waste converted to energy annually.

The substrate mix consists of organic waste and cattle manure from a nearby farm that belongs to the operator. The largely liquid organics are introduced to the 2,823 cubic-meter digester by means of a central pump, according to WELTEC.

Finally, the digestate is separated and the solid phase is dried with special technology in order to further reduce the volume. Most of this residue is used as compost, and some of it as fertilizer, the company said.

Waste-to-energy plants utilize feedstocks such as landfill, biomass and agricultural waste. Environmental scientists say that methane gas is multiple times more harmful to the atmosphere than carbon dioxide.