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Anaerobic Digestion

Anaerobic Digestion is a renewable energy source.

The anaerobic digestion waste management process can be used industrially or domestically and involves the recycling of organic waste products into energy to reduce landfill. Biodegradable products like those that we put in our green bins to be collected by the council, such as grass clippings, leftover food and waste paper are all ideal for the use in an anaerobic digester.

What is an anaerobic digester?

An Anaerobic digester is an air tight container that breaks down biodegradable waste such as feedstock, sewage sludge & food wastes and turns the waste products into reusable bi-products of Biogas and digestate in an environmentally friendly way.

The waste when left in an anaerobic digester to decompose and breakdown through natural chemical reactions results in, for easy understanding, a solid, a liquid and a gas.

The gas known as Biogas can be used as an eco friendly biofuel. Biofuel is a renewable energy which reduces the need for fossil fuels.

The solid & liquid products are both forms of digestate.

The solid digestate is produced by acidogenesis and is known as Acidogenic digestate.  Acidogenic digestate is fibrous in texture and consists of structural plant matter such as lingen and cellulose. It has a high moisture retention and contains minerals and remnants of bacteria.

The liquid digestate is produced by methanogenesis and is known as Methanogenic digestate or more commonly as sludge, slurry or liquor. The Sludge is high in nutrients such as nitrates and phosphates.

Although the digestate is technically not compost it does have very similar properties and can be used as a soil conditioner.  It contains nutrients to encourage plant growth and can protect soils against erosion as well as increasing the organic content of the soil. Equally the liquor can be used as a fertilizer and replace the need for chemical fertilizers.