|Garcia-gonzalez, Maria - Instituto Tecnológico Agrario De Castilla Y León (ITACYL)|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 7/20/2017
Publication Date: N/A
Technical Abstract: Phosphorus (P) recovery of anaerobically digested swine wastewater and side-stream municipal wastewater via magnesium precipitation was enhanced by combining it with the recovery of ammonia (NH3) through gas-permeable membranes and low-rate aeration. The low-rate aeration stripped the natural carbonate in the wastewater and increased pH, which accelerated NH3 uptake in the gas-permeable membrane system and benefited P recovery. The combined process provided quantitative (ca 100%) P recovery efficiencies. With active NH3 extraction, the magnesium phosphates produced contained higher phosphate grade (P2O5 = 44-46%) and lower nitrogen (N), similar to the composition of the biomineral newberyite.