高磷赤铁矿选矿酸性废水动态膜反应器处理试验

Experiment on the Treatment of Acid Wastewater from Beneficiation of High-phosphate Hematite by Dynamic Membrane Reactor

利用改性脱磷剂开发原位生成型动态膜反应器对高磷赤铁矿选矿酸性废水处理进行了试验研究。试验结果表明,选矿酸性废水除磷效果与脱磷剂的投加量、速度梯度(G值)、反应时间及pH等因素有关。对于pH=2.50～2.53,含磷98.85 mg/L的实际选矿废水,原生脱磷剂和改性脱磷剂的最佳投加量分别是23.00 g/L,20.00g/L,经动态膜反应器处理后出水磷去除率分别达到94.33%,99.72%,出水pH分别为8.12和3.06,其浊度均能达到出水要求。采用改性脱磷剂和动态膜反应器耦合技术可实现高磷赤铁矿选矿酸性废水在线循环与资源化高效利用。

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.