Abstract: A method for producing biogas by anaerobic digestion of organic matter may involve feeding organic matter suitable for biogas production to a first tank reactor, and in the first tank reactor, contacting the organic matter with biogas producing microorganisms for digestion under anaerobic conditions. The organic matter may be digested in the first tank reactor while producing biogas. The method may further involve providing digested sludge from an anaerobic digestion process in a second tank reactor, which differs from the first tank reactor, the digested sludge containing a desired composition of nutriments. The nutriments may be fed into the first tank reactor.

Abstract: A disintegrating system for treatment of organic material may include multiple disintegrating units, each having an inlet for receiving material, and an outlet for outputting treated material. A first inlet of a first disintegrating unit may be configured to receive organic material, and a first feedback pipe may be connected between the outlet of the first disintegrating unit and the inlet of a second disintegrating unit. An outflow of the disintegrating system may be connected to the outlet of at least the first disintegrating unit, wherein the sum of the introduced material is available at the outflow.