Anaerobic Digestion

So how do we turn our solid fish waste into energy? By using a natural proccess called anaerobic digestion. Anaerobic digestion is the bacterial decomposition of organic compounds in an oxygen-free environment. This process involves four steps: 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.

Anaerobic digestion produces two key products: biogas and digestate. Biogas can be used in a biogas boiler to generate electricity. Digestate consists of leftover nutrients from the waste that can be used and sold as a biofertilizer. This digestate serves as an example of a value-added product.

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