Digestate is a solid material that remains after the anaerobic digestion of a biodegradable feedstock. Nijhuis has developed various options for treating digestate. Under anaerobic circumstances, organic waste material is transformed into biogas which can be used to produce heat, electricity, and concentrated fertilizer.

Pre-treatment of raw materials:
To optimize the biogas quality and quantities, some feedstock materials require a pre-treatment step, like macerating, sterilization, or pasteurization processes.

Digester, type AECOMIXTM-Taurus:
Under anaerobic conditions, the feed materials are digested/fermented to create biogas with around 50-60% methane and 30-40% carbon dioxide. The digester tank is equipped with a mixing and heating system.

Biogas treatment & utilization:
Biogas can feed boilers and Combined Heat & Power (CHP) installations or be upgraded to green or natural gas and supplied to the gas grid.

Solid/liquid separation:
The solids can be separated from the liquids by mechanical separation systems, like a screw press, decanter centrifuge, or dewatering drum.

Manure treatment, type GENIAAL system:
A revolutionary and cost-effective solution to turn manure into a bio-based fertilizer and clean water. An innovative solution based on a smart combination of proven decanting, flocculation-flotation, membrane solutions, and application know-how.