焙烧磷尾矿处理含磷废水的研究

为了将磷尾矿进行资源化利用，用不同温度下焙烧的磷尾矿对低浓度含磷废水进行了处理。研究了焙烧的磷尾矿投加量、氨水协同处理、反应温度和反应时间等因素对低浓度含磷废水的处理效果。结果表明，投加2.5 g/L的950 ℃焙烧后的磷尾矿，在反应温度为20 ℃、反应时间为20 min时，含磷废水的除磷率达到99.44 %，初始浓度从44.51 mg/L降至0.25 mg/L，达到《污水综合排放标准（GB 9897—1996） 》一级标准。投加氨水作为助处理剂可提高磷尾矿对含磷废水的处理效果。

Treatment of Phosphorus-Containing Wastewater by Roasted Phosphorus Tailings

To realize resource utilization of phosphorus tailings， phosphorus tailings roasted at different temperatures were used to treat low concentration phosphorus-containing wastewater. The effects of the addition of roasted phosphorus tailings， ammonia water co-treatment， reaction temperature and reaction time on the treatment of low concentration phosphorus-containing wastewater were studied. The results showed that the addition of 2.5 g/L phosphorus tailings roasted at 950 ℃， the phosphorus removal rate of the phosphorus-containing wastewater reaches 99.44%，and the initial concentration reduces from 44.51 mg/L to 0.25 mg/L when the reaction temperature is 20 ℃ and the reaction time is 20 min， reaching the first-level standard of "Integrated Wastewater Discharge Standard （GB 9897—1996）". Adding ammonia water as auxiliary treatment agent can improve the treatment effect of phosphorus-containing wastewater by phosphorus tailings.