Contribution to Effective Use of Wastewater Resources: Utsunomiya City held an opening ceremony for digester gas power generation facilities for the Kawada Water Recycling Center
Eight phosphoric acid fuel cells, the largest in wastewater treatment facilities in Japan, start operation
A consortium of three companies: METAWATER Co., Ltd. (Headquarters: Tokyo, Japan; President: Tomoyasu Kida; hereinafter “METAWATER”) and two electric contractors in Utsunomiya City, Kyoshin Denko and Biko Denki, led by METAWATER, received an order in 2014 for the construction of digester gas power generation facilities for the Kawada Water Recycling Center (Utsunomiya, Tochigi; Mayor: Eiichi Sato) with the largest wastewater treatment capacity in Tochigi Prefecture, and undertook the construction of the facilities. We are pleased to announce that the construction of Japan’s largest phosphoric acid fuel cell digester gas power generation facilities is now complete, and operation will start in April this year.
In commemoration of this event, a ceremony hosted by Utsunomiya City was held today to celebrate the start of power generation at the digester gas power generation facilities for the Kawada Water Recycling Center.
About Digester Gas Power Generation FacilitiesApproximately 3.3 million Nm3 of biogas (i.e. flammable gas mainly comprised of methane) per year is generated during the wastewater treatment process at the Kawada Water Recycling Center.
In order to facilitate the effective use of this biogas, the Utsunomiya City Waterworks Bureau aims to introduce phosphoric acid fuel cell power generation facilities and generate profit by utilizing wastewater resources and selling the electricity generated.
Fuel cell power generation facilities are devices to generate power by producing hydrogen from methane, which is a principal component of biogas generated from sewage sludge, and reacting it with oxygen in the air. The main characteristics of the facilities include high power generation efficiency, easy maintenance, and extremely low noise, vibration, and gas emissions due to the use of chemical reactions to generate power.
Received Feed-in-Tariff (FIT)*1 Certification as Sewage Sludge Power Generation FacilitiesThe facilities have received certification as renewable energy power generation facilities under the Act on Special Measures concerning the Procurement of Renewable Electric Energy by Operators of Electric Utilities.
*1 A scheme introduced by the Agency for Natural Resources and Energy requiring electric utilities to purchase lectricity generated from renewable energy sources on a fixed-period contract at a fixed price.