Our green solution: Organic Fertiliser

Organic fertiliser, a byproduct of biomethane

Organic fertiliser is a by-product of biomethane. In the process of making the biogas, we’re left with a digestate which we use to make valuable organic fertiliser that is rich in Nitrogen, Phosphorus and Potassium (NPK). 

What is organic fertiliser?

Organic fertilisers are plant or animal-based substances that are used to provide essential nutrients to soil and plants. Unlike synthetic fertilisers, which are made from chemicals and minerals, organic fertilisers are derived from natural materials and are considered to be more environmentally friendly. These can include compost, manure, bone meal, and other materials that are high in nitrogen, phosphorus, and potassium, which are essential for healthy plant growth. These fertilisers help to improve soil structure, increase the availability of nutrients to plants, and enhance the overall health and productivity of the soil.

At the Wijster facility in The Netherlands we are producing a 100% manure based granular fertiliser, with a dry matter content of 90% or more. The end product is recognized as export quality according the specifications of European norm: Regulation (EC) No 1069/2009 https://eur-lex.europa.eu/eli/reg/2009/1069/oj.

Our green solutions

Green Create produces biogas that we upgrade into many useful energy forms, such as Bio-Methane, Bio LNG and renewable energy. During the process of making biogas, we convert the surplus into byproducts such as organic fertilisers.

Biomethane

The biofuel biomethane is a unique renewable alternative to natural gas. To create this biofuel, we use mainly manure and some organic waste streams.

Bio LNG

Bio LNG is liquified biomethane and has a far lower impact on the environment. This biofuel is completely made from organic streams.

Renewable Energy

We have the innovative capability to turn biomethane into electricity and heat. We create renewable electricity and heat in large Combine Heat and Power (CHP).

Ammonium Sulphate

After producing the biomethane, we strip the ammonia that is released during the biomethane process from the system and transform it into ammonium sulphate.

Organic Fertiliser

After producing methane, there is still a product left high in nutrients. We dry this product and press it into pellets or granules thus producing organic fertiliser.

Biogenic CO2

During the process of turning biogas into usable products, we release biogenic carbon dioxide (CO2). This is a result of the combustion or decomposition of organic material.

How do we make organic fertilisers?

We make biogas in anaerobic digester tanks (reactors). After the process, we’re left with biogas and a digestate. This material from the reactors is separated into a solid and liquid fraction through a decanter centrifuge.

The solid fraction from this separation process is referred to as ‘dried digestate’ and is a valuable organic fertiliser rich in NPK. The solid digestate from the decanter centrifuge has a moisture content of approximately 72 per cent, so it’s still considerably wet.

To make the fertiliser easier to transport, we dry it further. A fertiliser with a moisture content of approximately 20 per cent remains. We can put it in a bag so it’s more accessible to a wider range of customers who may not have the necessary farm equipment to handle the bulk solids.

How do you use organic fertilisers?

The solid fertiliser of 72 per cent moisture can be used in its bulk form and spread on cropland as a fertiliser. The 20 per cent fertiliser can be processed into pellets, providing a more gradual release of nutrients into the soil. In addition, it’s less likely to be blown away by the wind.