In an unique public-private partnership between The Vallei and Veluwe Regional Water Authority and manure transport company Jan Bakker HoSt engineered and constructed a biogas plant.

The plant is equipped with a Bright Biomethane biogas upgrading system. The bioenergy plant is called ‘Bio-energiecentrale Harderwijk’ and produces annually approximately 12.5 million Nm³ biogas annually from 65,000 tonnes of manure and 35,000 tonnes of agricultural waste products. The biogas is upgraded to 8 million Nm³ biomethane which is injected into the national gas grid and is equivalent to the natural gas consumption of more than 5,000 households.

Digestate treatment technology

The project includes a digestate treatment technology resulting in three end products: biomethane, clean dischargeable water and digestate or compost. High-quality fertilisers are processed for local sales in the agriculture sector and are used as raw material. After hygienisation, the digestate is separated into a thick and a thin fraction by a filter press. This exportworthy thick fraction is exported. The thin fraction passes through a biological purification, which results in dischargeable water that is discharged into the sewer.


Location Harderwijk, The Netherlands
Start-up November, 2018
Capacity 1,600 Nm³/hr raw biogas
980 Nm³/hr biomethane
Methane concentration raw biogas 55%
Methane concentration product gas > 89% (Dutch low calorific natural gas)
Efficiency 99,5%

More information

Do you want to receive more information on our biogas upgrading technology or do you want to find out what HoSt can do for you? Don’t hesitate to contact us through or call us on +31 (0)53 – 460 90 80.