The main objective of this study was to investigate the simultaneous
removal of TAN and PT from swine wastewater by the
proposed struvite recycling process. Owing to the presence of some
organicmatter inswine wastewater,the influence of organicmatter
on the crystallization of struvite was first studied by using simulated
swine wastewater. Second, the investigations were focused
on the performance of MP as the phosphate and magnesium
sources of struvite precipitation. Third, to effectively reduce the
cost of struvite precipitation, natural brucite mineral was used
as the alkali reagent for the pyrogenation of struvite at different
Mg(OH)2:NH4
+ molar ratios and pyrogenation times, and then the
obtained pyrolysate was recycled for the simultaneous removal of
TAN and PT from swine wastewater. Lastly, the economic evaluation
of the proposed recycling process was undertaken.