Anaerobic Digestion

Less Waste, More Energy

Anaerobic digestion is the bacterial decomposition of organic compounds in an oxygen-free environment. This process involves four stages: hydrolysis, acidogenesis, acetogenesis, and methanogenesis. Anaerobic digestion naturally occurs in animal excrement and can also be used to break down food waste or wastewater solids. One of the main products of this decomposition is biogas, which is primarily composed of methane and carbon dioxide.

Two key products are produced during anaerobic digestion: biogas and digestate. Biogas can be used in a biogas boiler to generate electricity, while digestate consists of leftover nutrients from the waste, which can be used and sold as biofertilizer. This digestate is an example of a value-added product.

In the BiG system, an anaerobic digester will process our solid fish waste. The fish waste will undergo anaerobic digestion, producing methane, which will then be fed into a biogas boiler to generate electricity for our lighting and heating systems.