Bioaugmentation with an acetate-oxidising consortium as a tool to tackle ammonia inhibition of anaerobic digestion.

Highlights: [•] Methanogens are the “key players” of anaerobic digestion under high ammonia levels. [•] Bioaugmentation of SAO co-culture was not possible in a UASB reactor. [•] M. bourgensis increased the maximum growth rate of SAO co-culture by 42%. [•] M. bourgensis reduced the incubation period of SAO co-culture by 33%. [•] Methanogens were the limiting factor of SAO co-culture bioaugmentation process. [Copyright &y& Elsevier]