A lot of chicken droppings = a lot of biogas
Chicken manure is popular with operators of agricultural biogas plants. It produces a particularly high gas yield – up to 85% compared to the use of corn silage.
The problem with ammonium nitrogen
But, of course, there’s a catch. Most plants can only handle a small amount of chicken manure as a co-substrate, due to the high nitrogen content in chicken droppings, which turns into ammonia during fermentation. Too much ammonia nitrogen inhibits the bacteria, and biogas production drops. The second problem is the high nitrogen content in the fermentation residue, causing environmental pollution when spread on the fields.
Botres biogas plants use a unique technology, with 50% more tolerance respecting the nitrogen content than conventional agricultural technologies. This way, significantly larger amounts of chicken manure in the substrate can be processed. Botres biorefineries even handle up to 100% chicken manure.