Patent ID: 9133430
Filing Date: 2015-09-15
Classification: C12M,Y02E

Abstract:
1. An apparatus for production of a biogas by anaerobic digestion of organic material, the apparatus comprising: a digester chamber defining: a gas generating zone for accommodation of the organic material which when accommodated in the gas generating zone generates the biogas by digestion of the organic material; and a gas collecting zone which is located above the gas generating zone in the digester chamber to collect the biogas generated in the gas generating zone; wherein a biogas outlet is defined in the gas collecting zone, the biogas outlet being arranged such that biogas exits the gas collecting zone through the biogas outlet; wherein one or more nozzles is/are arranged in the gas collecting zone, the nozzles being adapted to spray a gas cooling liquid into the gas accommodated in the gas collecting zone so as to cool the gas; wherein a collecting member is arranged in the gas collecting zone to collect the gas cooling liquid when sprayed from the one or more nozzles towards the collecting member so as to prevent the gas cooling liquid from entering the organic material; wherein one or more safety valves are arranged in the gas collecting zone, each safety valve defining an inlet which is fluidly connected to the interior of the gas collecting zone and an outlet which is fluidly connected to air outside the apparatus; and wherein at least one of the one or more safety valves is a liquid based safety valve and wherein the collecting member is arranged to cause the collected gas cooling liquid to flow into the liquid based safety valve whereby a predetermined liquid level in the liquid based safety valve is maintained.