SFP Zeeland

Autrichehavenweg 15, Westdorpe

The installation in Westdorpe was commissioned in 2019.

The installation converts organic residual flows from the agricultural sector into biogas through fermentation. The biogas is then cleaned and upgraded to biomethane. The biomethane is fed into the natural gas network where it then ends up at households and industry.


Staff members

Location overview


The process



In Westdorpe, both manure and other organic residual flows are processed. The residual flows supplied are both liquid and solid. The liquid flows are stored in silos, the solid products are stored internally in trench silos.



A menu is made based on the nutrients in the residual flows. Solid and liquid flows are combined into a homogeneous mass with a specific composition. This is, as it were, the menu for the bacteria in the digester.



The homogeneous mixture is pumped into the large silos (digesters). The residence time of the mass is about 100 days. During this period, the organic materials are converted by microorganisms into a mixture of:

  • 50-55% methane (CH4)
  • 40-45% carbon dioxide (CO2)
  • 0-5% oxygen (O2) & nitrogen (N2)



The gas produced by the micro-organisms is called biogas. This gas is collected in the "dome" which is visible on the roof of the installation.


Upgrade to biomethane

The biogas is then purified and dried and brought to the same quality as natural gas. After these treatments, it can be called biomethane and it is a sustainable alternative to fossil natural gas.


Feeding into the natural gas network

The green gas is then pressurized and fed into the natural gas network. The green gas reaches many households and companies via the gas network.


Liquid CO2

A by-product of the production of biomethane is CO2. This gas is cooled until it becomes liquid. This liquid CO2 is then used in the food industry (as a coolant) or in greenhouse horticulture (food for the plants in the greenhouse).


Organic Fertilizers

The remainder of the fermentation is called digestate and is liquid. It is then separated into a thin, liquid fraction and a solid fraction. The solid fraction is composted. The liquid part is stored in closed silos. Both variants (solid and liquid) still contain many valuable minerals and can be used in arable farming as an alternative to fertilizer.

The end products of SFP Zeeland

The various end products of SFP Zeeland in Westdorpe find their way to households, arable farming and industry,