缓解对矿生物矿化对回收的不利影响
Xingtong Chen1, Yongyun Li1, Yifei Ma2
1Research Center for Eco-Environmental Engineering, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China.
离子通过产生无形酸来阻碍 struvite 的形成. 添加二乙烯二胺四酸盐 (EDTA) 有效地克服了这种抑制,使废水处理中有效的斯特鲁维特生物矿化成为可能.
科学领域:
- 环境微生物学环境微生物学
- 生物矿物化科学 生物矿物化科学
背景情况:
- 斯特鲁维特生物矿化对于废水中的营养回收至关重要.
- 已知离子会干扰斯特鲁维特的形成,但其机制尚未完全理解.
研究的目的:
- 研究离子对Shewanella oneidensis MR-1诱导的斯特鲁维特生物矿物化的抑制作用.
- 探索减轻对 struvite 产量的不利影响的方法.
主要方法:
- 使用Shewanella oneidensis MR-1进行诱导的 struvite生物矿物化.
- 改变与 (Ca/Mg) 的比例以评估抑制.
- 引入不同度的二乙烯二胺四酸盐 (EDTA),以抵消的作用.
主要成果:
- 增加Ca/Mg比率从0到2:1显著减少了 struvite产量从98.6毫克到0毫克.
- 在早期生物矿物化阶段,离子通过形成无形酸盐 (ACP) 来抑制斯特鲁维特结晶.
- 添加二EDTA (1-3毫米) 已成功地将斯特鲁维特质量从0毫克增加到86.3毫克,减轻的抑制.
结论:
- 离子主要通过ACP形成来抑制斯特鲁维特生物矿化.
- 对环境安全的二EDTA是一种可行的化剂,可以克服诱导的抑制.
- 这项研究提供了一种实际的方法,以提高丰富的废水中的斯特鲁维特回收.
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