化工学报 ›› 2012, Vol. 63 ›› Issue (11): 3688-3693.DOI: 10.3969/j.issn.0438-1157.2012.11.045

• 能源和环境工程 • 上一篇    下一篇

固定床生物反应器模拟溶浸采铀吸附尾液中Fe2+的氧化试验

王清良1,2, 杨懿全2, 杨敬2, 陈勇博2, 胡鄂明2, 张洪灿2, 余润兰1, 邱冠周1   

  1. 1. 中南大学资源加工与生物工程学院, 湖南 长沙 410083;
    2. 南华大学核资源与核燃料工程学院, 湖南 衡阳 421001
  • 收稿日期:2012-02-10 修回日期:2012-06-15 出版日期:2012-11-05 发布日期:2012-11-05
  • 通讯作者: 王清良
  • 作者简介:王清良(1969-),男,硕士,教授。
  • 基金资助:

    国家自然科学基金项目(51154003)。

Oxidation of Fe2+ in simulative adsorption tail solution of leaching uranium through packed bed bioreactor by Acidithiobacillus ferrooxidans

WANG Qingliang1,2, YANG Yiquan2, YANG Jing2, CHEN Yongbo2, HU Eming2, ZHANG Hongcan2, YU Runlan1, QIU Guanzhou1   

  1. 1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China;
    2. School of Nuclear Resource and Nuclear Fuel Engineering, University of South China, Hengyang 421001, Hunan, China
  • Received:2012-02-10 Revised:2012-06-15 Online:2012-11-05 Published:2012-11-05
  • Supported by:

    supported by the National Natural Science Foundation of China(51154003).

摘要: 以活性炭作载体固定嗜酸氧化亚铁硫杆菌,构建固定床生物反应器,模拟溶浸采铀矿山吸附尾液全Fe浓度和溶液pH条件,对生物反应器氧化Fe2+工艺参数进行了试验研究。结果表明:活性炭作载体比无载体时生物反应器氧化Fe2+速率增加了1.4倍,由0.5 g·L-1·h-1增大至1.2 g·L-1·h-1;生物反应器运行过程中溶液中全Fe因生成铁钒而不断消耗,需要定期清理反应器中的铁矾和补充FeSO4以保持溶液中全Fe浓度;生物反应器最优的操作条件是:底部通气,Fe2+浓度为5 g·L-1时,溶液流量为1.2~1.4 L·h-1;Fe2+浓度为1 g·L-1时,溶液流量为5.4 L·h-1

关键词: 固定床生物反应器, 嗜酸氧化亚铁硫杆菌, 氧化, 溶浸采铀

Abstract: The packed bed bioreactor was designed and set up,active carbon was selected as carrier to immobilize Acidithiobacillus ferrooxidans(A. f).The process parameters of oxidizing ferrous were investigated by simulating ferrous concentration and solution pH value in uranium mine in bioreactor.The results showed that the ferrous oxidation rate could increase 1.4 times from 0.5 g·L-1·h-1 to 1.2 g·L-1·h-1 with active carbon carrier. Iron in solution was consumed due to formation of NH4Fe3(SO4)2(OH)6 during operation.It’s necessary to add ferrous periodically in order to keep certain iron concentration in solution and clean up NH4Fe3(SO4)2(OH)6 in bioreactor.The optimum operation condition of bioreactor was ventilation from bottom,ferrous concentration keeping 5 g·L-1 and solution flux keeping 1.2-1.4 L·h-1 or ferrous concentration keeping 1 g·L-1 and solution flux keeping 5.4 L·h-1.

Key words: packed bed bioreactor, Acidithiobacillus ferrooxidans, oxidation, solution mining of uranium

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