Wet anaerobic digestion of manure and agri-food residues and digestate production

This technology uses wet anaerobic co-digestion to process a wide range of organic materials, including agricultural residues, livestock manure, food industry by-products, municipal biowaste, green waste and industrial organic waste.

By combining different feedstocks, the system maximises biogas production, which is upgraded to biomethane for energy use, while also producing nutrient-rich digestate that can be applied as a natural fertiliser.

Turning organic waste into renewable energy and fertilisers – the process

The process is based on mesophilic wet anaerobic digestion using continuous stirred tank reactors (CSTR) and includes the following steps:

Pre-treatment and feeding
Organic materials are prepared before being fed into the digester to ensure a stable and efficient process.
Wet anaerobic co-digestion
Inside the reactor, microorganisms break down organic matter under controlled conditions (temperature, feedstock mix and retention time), producing biogas and digestate. Continuous mixing ensures uniform conditions and stable performance.
Biogas upgrading and use
The biogas is upgraded to biomethane, which can be injected into the natural gas grid or used locally to generate electricity and heat through combined heat and power (CHP) units.
- Digestate management
  The remaining material (digestate) is stored, monitored and used as a fertiliser in agriculture.