NOVELTY - Recovering ammonia from a process of anaerobic digestion, comprises: (a) anaerobically digesting an organic, nitrogen containing substrate to produce a turbid digested liquid, (b) introducing the digested liquid to a culture of phototrophic microorganisms, (c) stripping ammonia gas from the liquid media with a stripping gas to produce a mixture of water vapor and stripping gas, stripped ammonia gas stream and an ammonia-deficient liquid stream, and (d) condensing the mixture in a condenser to form a liquid ammonia condensate, water and cooled stripping gas.    USE - The method is useful for recovering ammonia from a process of anaerobic digestion (claimed).    ADVANTAGE - The cost-effective method is capable of recovering ammonia from anaerobic digestion process with minimal energy inputs and without using chemicals additives, thus improving the anaerobic digestion of organic residuals and minimizing adverse environmental and public health impacts.    DETAILED DESCRIPTION - Recovering ammonia from a process of anaerobic digestion, comprises: either (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 carbon dioxide and bicarbonate in the presence of natural or artificial light, where the culture has a surface to volume ratio sufficiently high that light transmission to the culture is adequate for the culture to uptake carbon dioxide and bicarbonate from the digested liquid of step (a) and accumulate biomass, to produce a liquid media having an elevated pH, (c) stripping ammonia gas from the liquid media produced in step (b) with a stripping gas that does not include biogas or methane, to produce 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; or the step of (a) as above per se, (b1) blending the obtained liquid with a liquid having elevated pH, to produce a blended and liquid effluent, (c1) stripping ammonia gas from the produced blended liquid effluent within a gas stripping unit with the stripping gas, to produce an ammonia-deficient liquid stream and an ammonia and water vapor-enriched gas stream combined with the stripping gas, (d1) introducing at least a portion of the ammonia-deficient liquid stream to a culture of phototrophic microorganisms capable of consuming carbon dioxide and bicarbonate in the presence of natural or artificial light, (e) cooling the ammonia and water vapor-enriched gas stream combined with the stripping gas, (f) condensing the ammonia and water vapor-enriched gas stream combined with the stripping gas in a condenser to form a liquid ammonia condensate and a cooled stripping gas, (g) heating the cooled stripping gas containing any remaining, unreacted, ammonia and water vapor and reintroducing this heated stripping gas back into the gas stripping unit and (h) using the produced liquid media as the liquid having elevated pH in step (b).