Economic Recovery of Nitrogen and Phosphorus from Anaerobic Digestate as Concentrated Ammonium Hydroxide and Hydroxyapatite

The  paper describes the laboratory and pilot studies of an autotrophic fixed film reactor, the rotating photo-bioreactor (RPB), that reclaims concentrated ammonia and phosphorus from anaerobic digestate.

Why Recover Nutrients from Anaerobic Digestion?

All of the nitrogen and phosphorus present in an anaerobic digester’s influent can be found in the effluent digestate.…