News - April 16, 2024

BIOGEST collaborates with INA Group for a biomethane project

BIOGEST-PowerRing biomethane turnkey plant

The project will contribute to INA’s green energy transition


VIENNA, AUSTRIA / ZAGREB, CROATIA: BIOGEST received an order as a general contractor to build a biomethane plant for INA in Sisak, central Croatia, including site preparation by 2026. The biomethane produced in Sisak could be delivered to Croatia's gas system, while the residue remaining from the production could be used as an ecologically acceptable fertilizer.

Located in Sisak, the project will be carried out in the tried and tested BIOGEST PowerRing technology, which has advantages regarding energy efficiency and operational safety as well as the space-saving modular design, underscoring its suitability and effectiveness for the Croatian market. During fermentation of mostly agricultural residues (straw, manure, slurry, and different types of biodegradable waste), the residues are transformed into high-quality organic fertilizer that substitutes for chemical products.

"We are thrilled to collaborate with INA Group on this biomethane project in Croatia. Our innovative PowerRing technology will play a vital role in transforming agricultural waste into renewable energy, contributing to the country's green energy transition and showing the potential of biomethane as a sustainable fuel source,” remarked BIOGEST’s CEO, Martin Schlerka.

Biomethane is the only renewable energy source that can be carbon-negative, as it significantly reduces methane emissions from agricultural operations. BIOGEST’s plants produce not only pipeline-quality green gas but also an organic fertilizer that helps reduce the use of chemical fertilizers in agriculture.

Picture: Gerlinde Gorla ©

Press Contact


Andronika Kirov

Andronika.Kirov sign: atbiogest.sign: dotat


Martin Schlerka (CEO)

Gerald Bartl-Fauler (CTO)

Martin Hornhuber (COO)

BIOGEST® is a pioneer brand offering full-service biomethane and biogas plant solutions worldwide and is headquartered in Vienna, Austria. With more than 30 years in the business, BIOGEST has realized 190+ projects in over 20 countries. The tried and tested BIOGEST technology is created to customize green gas projects from strategic planning to co-investment, construction, operation, maintenance, and management of plants. BIOGEST engages in converting organic waste into clean and renewable energy to combat the rise in waste produced and satisfy the growing energy demand.


INA Group plays a leading role in oil operations in Croatia and an important role in the region in oil and gas exploration and production, oil refining and distribution of oil and petroleum products. The company comprises several subsidiaries fully or partial owned by INA, d.d. The Group’s seat is in Zagreb, Croatia. INA has upstream operations in Croatia and Egypt. Oil refining takes place at the Rijeka Refinery, while sustainable alternative businesses are being developed at the Sisak industrial site. INA’s regional retail network consists of more than 500 retail outlets in Croatia and neighboring countries. INA Group is a member of MOL Group.

INA Group