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Clarke Energy USA to supply upgrading and injection to BioTown Biogas

Clarke Energy USA, Inc., a Kohler Company, has announced an agreement with BioTown Biogas AG (BioTown) to design, supply, and install a biogas upgrading plant generating biomethane (aka renewable natural gas – RNG) for the national gas grid, with the inclusion of a biogas engine for renewable heat and power at BioTown's biogas facility in Indiana (IN). The project is a key strategic renewable energy win for Clarke Energy’s USA business after expanding its product offering with RNG solutions.

Clarke Energy USA, Inc., a Kohler Company, has been selected by BioTown Biogas AG (BioTown) to design, supply, and install a biogas upgrading plant generating biomethane (aka renewable natural gas – RNG) for the national gas grid, with the inclusion of a biogas engine for renewable heat and power at BioTown’s biogas facility in Indiana (photo courtesy BioTown).

BioTown is an existing renewable energy business with a long track record of success in the sector. The company is expanding into the generation of biogas to be cleaned to gas grid injection standards as biomethane.

Five farming groups from the locality close to the plant will supply agricultural waste feedstock for the digesters. This will help to reduce emissions from the farms and provide up to 600 000 (US) gallons (≈ 2.27 billion litres) per day of slurry from approximately 25 000 milking cows equivalent, for the biogas plant to operate on.

The biogas from the digesters will be used for two functions – firstly 460 scfm of treated biogas will fuel the INNIO engine to generate renewable heat and power to support the local operations.

In addition, over 1 500 scfm of raw biogas will be cleaned, upgraded into RNG, and injected into the national gas grid where it will be marketed into the California Low Carbon Fuel Standard (LCFS) program and capturing D3 Renewable Identification Numbers (RINs).

BioTown AG is delivering its first project incorporating technology to upgrade raw biogas into RNG. We selected Clarke Energy due to the high performance of the membrane-based solution and the company’s ability to deliver a full turnkey solution backed by local aftersales support. In addition, the financial closure of the project was helped by the fact that Clarke Energy is a wholly-owned KOHLER company satisfying our lender’s concerns regarding our suppliers’ corporate strength to deliver this important large-scale and complex project, said Chad Hoerr, General Manager of BioTown.

First US RNG project for Clarke Energy

The fully containerized INNIO Jenbacher J420 gas engine will generate 1.4 MW of renewable power, in either a prime or resilient isolated operation mode, and provide 5 388 MBTU per hour of renewable heat to the digesters.

A three-stage membrane system provided by TPI will inject over 1 000 scfm of RNG into the national gas grid.

The installation will enable the avoidance of 150 000 tonnes per annum of carbon dioxide (CO2) emissions to the atmosphere, and the system will be delivered as part of a turnkey solution to the customer, backed up by Clarke Energy’s established local service network.

Renewable natural gas has the potential to support the decarbonization of America’s gas distribution network and is an important part of our offering in the US market. To this end, we are honored to have been selected by BioTown to deliver our first RNG project alongside them in Indiana. BioTown has been an important customer over the past few years, and it is pleasing to see they have shown continued faith in Clarke Energy with the award of this contract, commented Jamie Clarke, CEO of Clarke Energy.

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