Patent ID: 8637304
Filing Date: 2014-01-28
Classification: C12M,C12N,C12P,Y02E

Abstract:
1. A method for recovering ammonia from a process of anaerobic digestion, comprising the steps of: (a) anaerobically digesting an organic, nitrogen containing substrate to produce a turbid digested liquid containing ammonia, carbon dioxide, methane and suspended solids; (b) introducing the digested liquid of step (a) to a culture of phototrophic microorganisms capable of consuming CO (c) stripping ammonia gas from the liquid media produced in step (b) with a stripping gas that does not include biogas or methane, thereby producing a mixture of water vapor, stripping gas and stripped ammonia gas stream and an ammonia-deficient liquid stream; and (d) condensing the mixture of water vapor, stripping gas and stripped ammonia gas stream in a condenser to form a liquid ammonia condensate, water and cooled stripping gas.