关于使用Desulfovibrio处理硫酸盐废水的研究
Baofu Zhao1, Hui Sun1, Peng Jiang1
1International Joint Research Center of Green Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China.
Bioprocess and biosystems engineering
|July 7, 2023
概括
这项研究引入了一种更绿色的生物方法,用于使用Desulfovibrio细菌的烟气脱硫. 它有效地去除硫酸盐,并从废水中回收元素硫,为传统的化学处理提供了可持续的替代方案.
科学领域:
- 环境微生物学 环境微生物学
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 湿式烟气脱硫 (WFGD) 产生含有硫酸盐和硫酸盐的性废水.
- 传统的化学处理是有效的,但资源密集型,产生低价值的副产品.
- 生物处理为WFGD废水管理提供了更可持续,更环保的方法.
研究的目的:
- 研究微生物烟气脱硫利用硫酸盐作为电子接受器的可行性.
- 为了优化硫酸盐丰富的废水中Desulfovibrio细菌的生长条件.
- 在连续的生物过程中评估硫酸盐去除和元素硫回收的效率.
主要方法:
- 隔离和净化Desulfovibrio细菌. 这是一个很好的方法.
- 间歇和持续的实验,以确定最佳的生长和脱硫条件.
- 对硫酸盐去除率,元素硫的产量和细菌群体结构的分析.
主要成果:
- 对于Desulfovibrio的最佳生长条件: 38°C,pH值8.0,COD/SO比值为2;pH值在9.0以上或7.3以下受到抑制.
- 在模拟的废水中,Desulfovibrio成功地生长,其硫酸盐度高 (高达8000 mg/L).
- 连续工艺实现了99%的硫酸盐去除和>80% (高达90%) 在微氧耗尽下元素硫的回收.
- 液压保留时间 (HRT) 随着入硫酸盐度的增加而显著增加.
- 在反应堆中,Desulfovibrio是主要的细菌物种 (63.9%的丰度).
结论:
- 使用Desulfovibrio和硫酸盐作为电子受体的微生物脱硫是可行的.
- 这种生物方法为处理WFGD废水提供了优化和环保的替代方案.
- 该过程使得高效的硫酸盐去除和有价值的元素硫回收成为可能,即使来自高度流.
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