Green gas supply chain
By anaerobic digestion of agricultural waste streams green gas and/or electricity can be produced sustainably. Streams that are suitable for this process are collected on the Dutch so called ‘white list’. Another product of (co-)digestion is digestate (biogas slurry), which also contains all minerals that were originally present in the input waste/residual streams. This product is a suitable fast-acting fertilizer. Also it can be used as an input streams for the production of insects and terrestrial worms.
What we do?
ACRRES cooperates with partners on improving the possibilities for anaerobic digestion of natural grass. The main focus in this process is on both pre and post treatment. Natural grass is available in large quantities but is hard to process. If natural grass is to be digested, the minerals that groundsmen want to see removed from natural areas can be made available for agriculture. For this purpose ACRRES has a 1000 m3 digester and long-standing expertise on its day-to-day management.
Examples
ACRRES has worked for several years together with different organisations on innovations to improve the processing of natural grass for improving its biogas yield and reducing problems in the digester itself. Potentially, with this process also fibres can be produced possessing improved processing parameters in subsequent/linked processes (fibre processing).
Cooperation
At ACRRES much practice-related experience and knowledge are available on the digestion process and the management of the digester. Our 1000 m3 digester is built for experimental applications. In addition we have two 1 m3 digesters for testing small quantities of waste/residual streams.
Interested?
Are you interested in advancing the development of your technology together with us? And/or do you want to test your technology under practical/real life conditions? Discuss the possibilities with Chris de Visser tel.: 0320-291692, E-mail: chris.devisser@wur.nl
Related projects
CNG and LNG gas upgrading - In the DMT gas reprocessing unit biogas from the digester is refined to almost pure methane (about 97% CH4) and compressed into CNG (Compressed Natural Gas) that can be used as fuel for cars. In 2014, Skoda has introduced a number of new CNG vehicles to the press at ACRRES. At present, the CNG unit… 
Molares® - The Molares® is placed in the auger of the co-products for the digester. The Molares® is a kind of hammer mill and ensures that all co-products can be reduced significantly. This allows long-fiber products such as large wild grasses, reeds and two-year old summer grass clippings from nature areas to be used as well. These… 
AGREE - This project is an EU project (EU FP7) and together with European partners, an European innovation agenda on energy efficiency in agriculture and horticulture was designed. Specifically for the Dutch sectors of horticulture, livestock and arable farming, the energy consumption in the major crops/animal types was determined. Based on this, energy saving measures have been…
