NUTRIENT RECOVERY SYSTEMS AND METHODS

摘要

Methods, systems, and apparatuses for anaerobic digestion of waste fibrous material and the recovery of nutrients are provided. Methods, systems, and apparatuses disclosed herein provide mechanisms to release dissolved gases from anaerobic digester effluent. Methods, systems and apparatuses disclosed herein can recover one or more nutrients from anaerobic digested effluent using a range of temperatures, aeration rates, aeration times, pH ranges, and settling times.

主权项

1. A method for recovering a nutrient comprising:
(a) heating and aerating anaerobic digester effluent in an aeration reactor to convert soluble ammonium to gaseous ammonia; (b) providing gaseous ammonia from the aeration reactor to a stripping tower, said stripping tower providing controlled amounts of acid that reacts with gaseous ammonia; and (c) recovering an ammonium salt produced from reacting the acid with gaseous ammonia in the stripping tower.