Anaerobic digestion is an environmentally friendly and effective method of treating biodegradable waste matter. Microorganisms break down the material in the absence of oxygen, creating a significant reduction in the organic load.
Produced during the wastewater treatment process, processing and disposing of sewage sludge is a major money and energy sink. Thermophilic sludge digestion solves this problem by producing energy and reducing disposal costs.
Whether the aim is drainable water, maximum phosphate removal or nitrogen recovery for fertilisers, manure digestion is always the first step. Not just because the resulting biogas allows for energy-neutral manure processing, but also because the leftover manure is homogeneous and will release more nutrients.
There’s a range of known complications when it comes to digesting chicken manure, from overly dry manure and grit contamination to excess nitrogen levels. As a result, people tend to forget that chicken manure contains biogas potential and useful nutrients. Due to the worldwide increase in the consumption of chicken and eggs, there is an abundance of chicken manure, which is why we need a process to digest this waste.
After the digestion of manure and agricultural products, a residual fraction called digestate remains. Typically, digestate cannot be used as a fertiliser without further treatment and it is usually separated into a thick and a thin fraction via different separation techniques.
The phosphate-rich thick fraction can be dried and processed, whereas the thin fraction contains high levels of organic pollutants and high nitrogen concentrations. We extract the nitrogen using AMFER® technology, after which the thin fraction can be processed into dischargeable or even reusable water.