Processing of Digested Pulp from Agricultural Biogas Plant

In the European Union, renewable energy sources (RES) constitute an important alternative to fossil fuels. Solid biomass is mainly used for the production of renewable energy. One of the RES types is the production of agricultural biogas as a result of the anaerobic digestion process (AD). This process generates biogas and digestate. The second product is a residue from the fermentation process, consisting mainly of nondigested organic and mineral components. The market offers many devices for the management of the digestate (digested pulp), e.g., separators that separate the raw material into solid and liquid fractions. The aim of the present book chapter was to discuss the possibility of improving the management efficiency of biogas plant by using the digested pulp as a fertilizer and for other purposes. For a designed 1 MWel biogas plant installation, modern technological solutions have been proposed. It can be concluded that a proper digested pulp management can bring additional profits to the biogas plant.