改性炉渣处理低浓度含磷废水试验研究
2015-10-21孙力刘雪刚周晓铁
孙力 刘雪刚 周晓铁



摘要 [目的]探讨改性炉渣处理低浓度含磷废水的最佳工艺条件。[方法]利用盐酸改性的炉渣处理低浓度含磷废水,分析溶液pH、改性炉渣投加量、反应时间、温度等因素对除磷效果的影响,并对改性锅炉炉渣的除磷机理进行了初步探讨。[结果]当溶液pH为8,改性炉渣的投加量为2.0 g,反应时间为60 min,温度为35 ℃时,磷的去除率最高,达96.59%。[结论]该研究为低浓度含磷废水的处理提供了理论参考。
关键词 富营养化;改性炉渣;含磷废水;除磷
中图分类号 S181.3 文献标识码 A 文章编号 0517-6611(2015)20-238-03
Abstract [Objective] The study aimed to discuss the optimal conditions for the treatment of wastewater containing low concentration of phosphorus by modified slag. [Method] Modified slag by hydrochloric acid was used to treat wastewater containing low concentration of phosphorus, and the effects of pH, dosage of the modified slag, reaction time and temperature on the removal effect of phosphorus were analyzed. Moreover, the mechanism of phosphorus removal by the modified slag was discussed. [Result] When the wastewater with pH of 8 was treated by 2.0 g of the modified slag for 60 min at 35 ℃, the removal rate of phosphorus was the highest, namely 96.59%. [Conclusion] The research could provide theoretical references for the treatment of wastewater containing low concentration of phosphorus.
Key words Eutrophication; Modified slag; Wastewater containing phosphorus; Phosphorus removal
随着我国人口急剧增长和工农业生产的快速发展,水体的富营养化现象给工业、生活用水、水产业和农业以及旅游业带来了极大的危害。近年来,渤海地区、太湖流域等地发生的赤潮现象与水中磷等营养物质含量过高有直接关系。研究表明,1 g磷可以导致水中蓝藻生长100 g。而这种蓝藻会产生致癌物质,并且使得水体散发刺鼻的气味。磷是通过若干不同的途径进入水域的,每人每年排出0.5 kg磷。含磷洗涤剂和其他日用磷酸盐的使用增加了磷的排放量。农田也有数量不等的磷排入水体。农田排水中有的可能是灌溉的退水, 有的来自牲畜的饲料场、养鸡养鸭场、树叶以及大气降尘,这些都是磷的排放源[1]。
目前,国内外常用的除磷方法有化学沉淀法、混凝法、离子交换法、生物法等,但各有不足之處。其中,化学沉淀法中化学沉淀剂的投加会引起废水pH上升,在池子及水管中形成坚硬的垢片,还会产生一定量的污泥;……
