Mäntsälän Biovoima
We receive biowaste and return it as energy and nutrients.
What we do in Mäntsälä
Mäntsälän Biovoima is a biogas plant in Mäntsälä, wholly owned by Auris Energy. We process biodegradable side streams to produce biomethane and recycled fertilisers.
We turn biowaste and biomass from wastewater treatment plants into renewable energy and return nutrients to productive use.
The plant in figures
43,000 tAnnual treatment capacity
33 GWhAnnual biogas production capacity
65,000 tRecycled fertilisers per year
3,500 tBiogenic carbon dioxide per year
The 2025 expansion
The expansion completed in 2025 doubled biogas production capacity, increased treatment capacity from 20,000 tonnes to around 43,000 tonnes and enabled us to process new feedstocks, such as biomass from wastewater treatment plants.
Bringing us biowaste
We receive biowaste and side streams from the food industry, biowaste from retail and logistics, biodegradable industrial materials and biomass from wastewater treatment plants.
We are conveniently located for transport, right beside Helsingintie. Following the expansion, we also accept more demanding feedstocks.
Your contact
Santtu Onikki
Production Manager
Feedstock deliveries from existing customers
Your contact
Jani Hautaluoma
Biogas Business Manager
Enquiries about feedstock partnerships
Buying recycled fertilisers
The biogas process produces nutrient-rich recycled fertilisers that support sustainable agriculture. Our plant produces around 65,000 tonnes each year.
Our products return nutrients to the soil and reduce dependence on virgin raw materials for fertilisers.
Buying biomethane or carbon dioxide
We process biodegradable materials into biogas, which we upgrade to biomethane. Biomethane replaces fossil fuels in industry, energy production and transport.
All the biogas we produce enters the local gas distribution network and passes through our compressor station into the national transmission network and on to European markets.
We also capture the carbon dioxide generated during biogas production and supply it for industrial use. The first deliveries will begin in 2027.
Contact details and news
Plant contact details
Our plant is located at Helsingintie 387, 04600 Mäntsälä.
If you notice odour nuisance or anything else of concern around the plant, please contact us. You can also submit an odour nuisance report under the environmental permit. Please specify the time as accurately as possible in your report.
On-call service
+358 50 382 3415
Notice, 5 March 2026
During the commissioning of our plant expansion, we experienced some commissioning-related process disruptions. We have corrected the issues identified and adjusted the process to ensure normal operation. During commissioning, there may occasionally have been odour nuisance in the immediate vicinity of the plant. We apologise for any inconvenience this may have caused.
News from Auris Energy and Mäntsälän Biovoima
Would you like to hear more?
We would be happy to tell you more about our services. You can also use this form to submit a report of possible odour nuisance under the environmental permit. Please specify the time as accurately as possible in your report.
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