Renova commissions 49.9MW Karatsu biomass plant after delays

Renova and its partners have launched commercial operations at the Karatsu biomass power plant, converted to the FIP scheme to secure a long-term power purchase agreement.

Share:

Gain full professional access to energynews.pro from 4.90€/month.
Designed for decision-makers, with no long-term commitment.

Over 30,000 articles published since 2021.
150 new market analyses every week to decode global energy trends.

Monthly Digital PRO PASS

Immediate Access
4.90€/month*

No commitment – cancel anytime, activation in 2 minutes.

*Special launch offer: 1st month at the indicated price, then 14.90 €/month, no long-term commitment.

Annual Digital PRO Pass

Full Annual Access
99€/year*

To access all of energynews.pro without any limits

*Introductory annual price for year one, automatically renewed at 149.00 €/year from the second year.

Japanese company Renova announced on September 30 the commercial commissioning of the 49.9-megawatt (MW) Karatsu biomass power plant, located in Karatsu City, Saga Prefecture. The plant, originally scheduled to begin operations in December 2024, experienced multiple delays before becoming operational on September 27, 2025.

The project was transferred from the feed-in-tariff (FIT) scheme to the feed-in-premium (FIP) mechanism to allow the signing of a fixed-price power purchase agreement (PPA) with an undisclosed offtaker. When certified in 2017, the facility qualified for a tariff of JPY24 per kilowatt-hour for 20 years under Japan’s FIT programme for large-scale biomass plants.

A project financed by four industrial partners

The plant is expected to generate around 350 gigawatt-hours per year using imported biomass, primarily wood chips and palm kernel shells (PKS). The special purpose company (SPC) Karatsu Biomass Energy LLC, which owns the project, is held by Renova (35%), Toho Gas (34%), JA Mitsui Lease (16%), and INNOCENT (15%). Renova holds a purchase option for JA Mitsui Lease’s stake.

The final investment decision was made in August 2021, and construction began in the same month. The original completion date was postponed to March 2025 before being pushed back to September 2025. Engineering, procurement, and construction (EPC) were handled by Nippon Steel Engineering, while Kansai Electric Power served as owner’s engineer.

Renova expands its biomass portfolio

Karatsu is the seventh biomass facility developed by Renova, bringing the company’s total installed capacity to approximately 445 MW, unadjusted for ownership share. It follows the 75 MW Omaezaki Port biomass plant, commissioned in January 2025 in partnership with Chubu Electric Power and other stakeholders.

Toho Gas, one of the project’s key partners, has also increased its involvement in the sector with a 10% stake in the 112 MW Tahara biomass power plant, commissioned in September 2025. The growing interest from Japanese utilities in such assets is tied to the revenue stability offered by long-term PPAs under the FIP scheme.

The commercial court of Évry has initiated judicial reorganisation proceedings for Global Bioenergies, with no buyout offer submitted to date, leaving open the possibility of liquidation.
Irving Pulp & Paper secures a $660mn loan to modernise its Saint John pulp mill, with new facilities capable of generating up to 145 MW of exportable electricity.
Canadian supplier Greenlane recorded $7.9mn in third-quarter orders through its subsidiary Airdep, confirming growing demand for its biogas desulfurization systems in Europe and the Americas.
Spanish group Qualitas Energy inaugurated the Three Maids facility near Winchester, an anaerobic digestion plant able to produce 120 GWh of biomethane annually from agricultural waste.
The federal government is granting $370mn to Canadian canola producers affected by a 75.8% tariff imposed by China, and is introducing fiscal and regulatory measures to strengthen the domestic biofuel industry.
Netherlands-based BTG Bioliquids and Canada’s NanosTech join forces to develop a modular solution for advanced biofuel production, with a project underway in Europe and Canada.
Teréga and GRDF have commissioned a backfeed station in Lot-et-Garonne, showcasing their cooperation to adapt gas networks to the rise of locally produced biomethane in Nouvelle-Aquitaine.
An Indonesian ministerial delegation visited China to explore waste-to-energy solutions, as the country moves forward with a $200mn project in Makassar.
Anaergia’s Italian subsidiary has been selected by Nortegas Renovables to build a biomethane facility in Andalusia using agricultural residues.
Mondi SCP will build a new biomass power plant in Ružomberok to boost energy self-sufficiency from 75% to 90% by 2027, with a €120mn ($129mn) investment supported by the European Union’s Modernisation Fund.
With a new EnviThan facility in Aube, EnviTec Biogas reaches 40 units in operation in France and confirms its deployment pace in the biomethane market.
Southwest Gas has submitted an agreement to the California Commission to inject biomethane produced from food and wastewater into its network, in line with SB 1440 regulatory requirements.
Quercus Real Assets and Elionia finalise a €76 mn bank financing to build three biomethane plants in Italy, with 50% of the debt guaranteed by SACE.
VINCI, through its subsidiaries, has established itself in the construction of Spain’s largest second-generation biorefinery, a €1.2bn project aimed at supplying 500,000 tonnes of sustainable fuels per year.
Ameresco commissions a biomethane facility in Lee County, processing 4,500 cubic feet of landfill gas per minute, and directly injects this renewable gas into the transmission network to reduce emissions and strengthen energy security.
A $24mn financing supports the construction of a 4.8 MW biomass plant designed to replace diesel in Opitciwan, bringing jobs and enhanced energy security for the Atikamekw community.
SUEZ and RATP Group formalise a supply contract for 100 GWh of renewable electricity per year, over a maximum period of sixteen years, powering the operations of the world’s third largest urban transport operator.
Valmet has secured a contract to supply a biomass boiler and flue gas cleaning system to Saica Group for its production site in El Burgo de Ebro, Spain, as part of its decarbonisation plan.
Qarlbo Biodiversity signed a memorandum of understanding with Woodland Biofuels for the delivery of thinned pine wood from managed forests in the United States to supply the Canadian company’s biomass operations.
The Canadian group Thermal Energy International has secured a CAD 1.4 million contract to install a heat recovery unit at a European malted barley producer, aiming to reduce energy costs and polluting emissions.

Log in to read this article

You'll also have access to a selection of our best content.

[wc_register_modal]