Method for degrading ammonia nitrogen and suspended solids in beneficiation wastewater

The invention discloses a method for degrading ammonia nitrogen and suspended solids in beneficiation wastewater. The method comprises the following steps: uniformly mixing and shaking beneficiation wastewater collected from different nodes of a concentrating mill, adjusting the pH value of the beneficiation wastewater to 7-11, introducing dry air into the solution, adding a proper amount of phosphate, stirring until phosphate is dissolved, wherein the molar ratio of phosphate ions to ammonium ions is 0.8-1.2: 1; then adding a proper amount of magnesium salt into the solution, carrying out reactions for 1-5 hours under stirring, standing, filtering, collecting mother liquor, adding a flocculating agent into the mother liquor, settling for 1-5 hours, and filtering to obtain reuse water. Through inspection, the contents of ammonia nitrogen and suspended solids in the reuse water meet the reuse requirements. The generated precipitate is a crystal precipitate, and is easy for solid-liquidseparation, the method is