Westenergy

What Westenergy does

Westenergy Oy is a Finnish private limited company founded in 2008 (registered in the Finnish Trade Register; operations launched with plant commissioning in August 2012) that operates a single waste-to-energy (WtE) combustion plant in Koivulahti, Mustasaari, Finland. The facility processes non-recyclable municipal solid waste delivered by its seven regional waste-management owner-shareholders, converting it through combustion into electricity (50.6 GWh produced in 2025), district heating (419 GWh in 2025, supplying roughly half of the Vaasa region's winter heat demand and the majority in summer), and recovered materials such as bottom slag. The plant achieved 94.7% availability in 2025 and processed 188,952 tonnes of waste, with flue gas scrubbing and other emission control systems in place.

The company operates under a cost-recovery (omakustannusperiaate) business model enshrined in its Articles of Association: services are provided exclusively to its seven owner companies at predetermined cost-recovery prices, the company generates no profit, and pays no dividends. Equity is split across Oy Botniarosk Ab (6.19%), Ab Ekorosk Oy (6.26%), Lakeuden Etappi Oy (24.75%), Loimi-H\u00e4meen J\u00e4tehuolto Oy (17.68%), Millespakka Oy (3.54%), Ab Stormossen Oy (23.30%), and Vestia Oy (18.27%). Revenue in 2025 was EUR 16.7M, down from EUR 18.9M in 2024 due to a 10-year turbine overhaul and market-driven electricity flexibility. The company holds ISO 9001, 14001, 45001 (since 2015), and ISO/IEC 27001 (March 2026) certifications.

Strategically, Westenergy is pursuing carbon-neutral energy production by the early 2030s. The principal initiative is the ECCU (Energy Carbon Capture & Utilisation) project, run through wholly-owned subsidiary Eccu Oy (established March 2024), which will capture and liquefy CO2 from the plant's flue gases for delivery to a power-to-x facility in Kristiinankaupunki for synthetic methane production, with CPC Finland Oy and Prime Capital AG as joint developers. Total ECCU investment is approximately EUR 140M, supported by a EUR 20M Finnish Ministry of Employment and Economy subsidy, with FEED design completed in 2025 alongside Andritz AG and Ramboll Danmark A/S, a Mustasaari construction permit granted in December 2025, and a planned 2028 operational date. A secondary R&D effort, Ekoälyä (Eco AI), is applying sensor fusion and AI to waste sorting and routing, funded by the European Regional Development Fund.

Name

Westenergy

Legal name

Westenergy Oy

Website

https://westenergy.fi

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

11–50 employees

Short description

Westenergy Oy is a Finnish waste-to-energy utility that operates the Koivulahti WtE plant, processing non-recyclable municipal waste from its seven regional waste-management owner-shareholders into electricity, district heating, and recovered materials on a cost-recovery basis.

Ownership category

akta.pro rank

Product category

Waste-to-Energy Services

NAICS

Waste Collection (5621), Solid Waste Collection (562111), Waste Management and Remediation Services (562)

SIC

Refuse Systems (4953), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Waste-to-Energy (WtE) Combustion Facilities (BPALACAD)

akta.pro secondary industries

Waste-to-Energy CHP (Municipal/Industrial Waste Incineration) (EUACAKAC), Waste-to-Energy CHP & District Heating Integration (Heat offtake systems) (EUAAAKAH), Ash, Slag & Residue Handling and Valorization (Bottom ash, fly ash, metals recovery) (EUAAAKAJ), WtE Plant Development, EPC & O&M Services (Project delivery and operations) (EUAAAKAK)

Keywords

• Waste-to-energy services
• District heating production
• Circular economy operations
• Municipal waste processing
• Carbon capture utilisation

Headquarters

HQ city

Koivulahti

HQ country

Finland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Operations, Personnel, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Waste Processing Services: Westenergy processes non-recyclable municipal waste for its seven owner companies. Revenue is based on cost-recovery principle (omakustannusperiaate) — the company covers its costs but does not generate profit margins or pay dividends.
2. Electricity Sales: Electricity produced from waste combustion is sold. In 2025, production was lower due to turbine 10-year overhaul and market-driven flexibility, generating 50.6 GWh.
3. District Heating Sales: District heat produced from waste combustion is sold. In 2025, production was 419 GWh, covering about half of Vaasa region's district heating needs in winter, and most in summer.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Westenergy runs a waste-to-energy plant in Koivulahti, Mustasaari, Finland, processing non-recyclable municipal waste delivered by its owner-companies and converting it into electricity, district heating, and recovered materials (such as bottom ash). Commissioned in August 2012 and operated on a cost-recovery basis, the plant accepts roughly 165,000 tonnes of waste per year and also acts as a hub for new circular-economy initiatives including the ECCU carbon capture project.

Product overview

Westenergy operates a waste-to-energy (WtE) plant in Mustasaari, Finland, that processes non-recyclable municipal solid waste into three main products: electricity, district heating, and recovered materials. The facility, commissioned in August 2012, has a 94.7% availability rate and produces approximately 419 GWh of district heat and 50.6 GWh of electricity annually. The plant also recovers bottom slag for recycling as part of its circular economy operations. Strategic initiatives include the ECCU (Energy Carbon Capture & Utilisation) project for CO2 capture planned for 2028, and the Ekoälyä R&D project developing AI-based waste sorting solutions. The company is owned by seven Finnish waste management companies and operates on a cost-basis principle.

Differentiator

Problem solved

Functional benefit

Products and services

• Waste-to-Energy CHP Operations (Koivulahti plant) Core service: combustion of non-recyclable municipal waste at the Koivulahti facility (capacity ~165,000 tonnes/year) with energy recovery, sold back to owner-companies on a cost-recovery basis under long-term feedstock agreements.
• Electricity production and offtake supply Electricity generated from waste combustion is delivered under long-term offtake to Vaasan Sähkö and the regional grid for distribution to end customers.
• District heating supply Heat recovered from waste combustion is delivered into the local district-heating network, supplying baseload, locally generated heat to municipal and industrial customers in the Ostrobothnia region.
• Recovered materials (bottom ash and residues) Bottom ash and other combustion residues are separated, recovered and returned to the circular economy (for example in construction materials), reducing the volume of waste that requires final disposal.
• ECCU carbon capture and utilization project A development-stage carbon capture and utilization initiative intended to capture CO2 from the Koivulahti plant's flue gases, supporting decarbonization of district heat and enabling future carbon-negative waste-to-energy operations.

Quantifiable outcome

• Waste processed: 188,952 tonnes in 2025
• +4 more outcomes

Named customers8 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Twelve partnerships are on record, tiered core, major and minor.

• CPC Finland OycoreStrategic or Co-development Partner · 1 December 2025Joint development of carbon dioxide capture plant with Prime Capital AG. CPC Finland and Prime Capital are developing a power-to-x plant in Kristiinankaupunki that will use captured CO2 for synthetic fuel production.
• Prime Capital AGcoreStrategic or Co-development PartnerJoint development of carbon dioxide capture plant. Prime Capital and CPC are building a power-to-x facility in Kristiinankaupunki to convert captured CO2 into synthetic methane.
• Eccu OycoreOEM/ Whitelabel/ Licensing PartnerWholly-owned subsidiary (100%) established March 2024 to build and operate the carbon dioxide capture plant. Westenergy will operate the CO2 recovery process.
• Andritz AGmajorTechnology or IntegrationFEED (Front-End Engineering Design) partner for carbon dioxide capture plant design completed in 2025.
• Ramboll Danmark A/SmajorTechnology or IntegrationFEED (Front-End Engineering Design) partner for carbon dioxide capture plant design completed in 2025.
• Vaasan Sähkö OycoreStrategic or Co-development PartnerProcesses energy produced by Westenergy into electricity and district heating in their owned equipment. Also provides necessary energy production during Westenergy's annual maintenance shutdown. Coordinates district heating storage.
• Lakeuden Etappi OymajorTechnology or IntegrationPartnership for bottom slag processing and further refining. Also a major owner (24.75% stake).
• Suomen Erityisjäte OymajorTechnology or IntegrationHandles bottom slag processing from Westenergy's operations. Partnership has stabilized slag handling processes making them cost-effective and predictable.
• Rescue Team Finland OymajorStrategic or Co-development PartnerSafety cooperation partner for annual maintenance shutdowns. Provides safety surveillance during large-scale maintenance operations involving up to 120 workers.
• MehiläinenmajorOthersProvides occupational health services for Westenergy personnel.
• Valmet AutomationminorImplementation/ SI/ Consulting PartnerContractor participating in annual maintenance shutdowns.
• Kiwa Sertifiointi OymajorOthersIndependent certification body that granted ISO/IEC 27001 information security certificate in March 2026.

Scale indicators10 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• Fortum Waste Solutions Oy: Fortum Waste Solutions is the Nordic incumbent arm of Fortum that handles hazardous and municipal waste, including recovery and treatment operations in Finland and Sweden. Overlaps with Westenergy in Nordic waste-treatment infrastructure but operates a broader, multi-site portfolio.
• EEW Energy from Waste GmbH: EEW is Europe's largest operator of waste-to-energy plants, with roughly 5 million tonnes of annual capacity across multiple facilities in Germany and neighboring countries. It is a broad incumbent in the same WtE/CHP category as Westenergy but at much larger scale and portfolio breadth.

Direct peers

• Tampereen Energia Oy: Tampereen Energia runs combined heat and power operations in the Tampere region and has explored waste-derived fuels. Closely comparable Finnish municipal energy utility with CHP/district-heating focus.
• AEB Amsterdam B.V. AEB Amsterdam is the municipal waste-and-energy company operating a large WtE plant in Amsterdam that supplies heat to the city's district-heating network. A direct municipal/regional WtE-to-district-heating peer at larger scale.
• Lahti Energia Oy: Lahti Energia owns and operates the Kymijärvi II waste-to-energy plant supplying district heating to the Lahti region. Direct comparability on facility technology, scale, and CHP/district-heating value chain.
• Vantaan Energia Oy: Vantaan Energia operates the largest waste-to-energy facility in Finland in Vantaa, producing district heating and electricity from non-recyclable municipal waste. Same domestic Finnish WtE/CHP business model and end-customer mix as Westenergy.
• Helen Oy: Helen (formerly Helsinki Energy) operates the Hanasaari B waste-to-energy plant as part of Helsinki's CHP and district-heating infrastructure. Comparable WtE-to-district-heating integration serving a large Nordic urban area.
• Sysav: Sysav is a Swedish municipal-owned waste and recycling company operating a waste-to-energy plant in Malmö that generates district heating and electricity, with a similar cooperative public-ownership and cost-driven structure. Like Westenergy, Sysav processes residual municipal waste from owner municipalities and sells recovered energy to a district-heating network.
• Renova AB: Renova operates the WtE plant in Gothenburg producing district heating, electricity, and recovered materials for municipal owners in western Sweden. The business model (waste-to-energy with municipal/cooperative shareholders, district-heating offtake) is closely comparable to Westenergy's Vaasa-region operations.
• AVR Rotterdam B.V. AVR operates waste-to-energy plants in the Rotterdam area producing heat and electricity for the Dutch market, with integrated residual processing. Similar in producing WtE-derived energy and recovering materials from incineration residues.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/WestenergyFinland
• Facebookfacebook.com/WestenergyOy
• LinkedInlinkedin.com/company/westenergy-oy
• Instagraminstagram.com/westenergyoy

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Westenergy