关键词: 高磷赤铁矿, 酸性废水, 动态膜反应器, 改性, 除磷

Abstract: The treatment of acid wastewater from beneficiation of high-phosphate hematite mineral by in-situ self-formed dynamic membrane reactor developed with modified dephosphorization agent was studied. The results indicated that the main effects on phosphate removal were the dosage of dephosphorization agent, velocity gradient (G value), reaction time, pH and so on. For the actual beneficiation wastewater with pH 2.50 ~ 2.53, and phosphate content of 98.85 mg/L, the optimum dosage of raw and modified dephosphorization agent was 23.00g/L and 20.00 g/L, respectively. The phosphate removal could reach 94.33% and 99.72%, correspondingly effluent pH was 8.12 and 3.06, respectively. Both of e turbidity could reach the effluent requirement after being treated with dynamic membrane reactor. The on-line circulation and entirely recycle of the acidic wastewater could be achieved by the coupling technique of modified dephosphorization and the dynamic membrane reactor. 

Key words: High-phosphate hematite, Acidic wastewater, Dynamic membrane reactor, Modification, Phosphate removal