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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
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在六价应力下异质氨同化系统的恢复机制
Tong Jiao1, Chuanfu Zhao1, Mengru Zhang1
1School of Civil Engineering, Shandong University, Jinan, Shandong, PR China; Laboratory of Water-sediment Regulation and Eco-decontamination, Jinan, Shandong, PR China.
Bioresource technology
|March 21, 2024
概括
异质氨同化 (HAA) 废水处理显示出对 (VI) 应激的弹性. 该系统在应力后恢复氨去除效率,突出其重金属废水的自我恢复能力.
科学领域:
- 环境生物技术环境生物技术
- 污水处理 污水处理 污水处理
- 微生物修复疗法 微生物修复
背景情况:
- 高盐度的废水处理带来了一些挑战.
- (VI) 是一种有毒的污染物,影响生物处理系统.
- 异质氨同化 (HAA) 是一种用于盐废水的新方法.
研究的目的:
- 研究 (VI) 对HAA的抑制作用.
- 为了阐明HAA在 (VI) 应力下自我恢复机制.
- 评估HAA系统的性能和微生物社区对 (VI) 的反应.
主要方法:
- 暴露HAA系统不同度的 (VI).
- 监测氨和 (VI) 的去除效率.
- 溶性微生物产品 (SMP) 和细胞外聚合物质 (EPS) 的分析.
- 微生物社区分析 (16S rRNA测序) 和基因表达概况 (qRT-PCR).
主要成果:
- 氨和 (VI) 的去除效率随着 (VI) 度的增加而下降.
- (VI) 暴露导致SMP中高分子量蛋白增加,并刺激了EPS的产生.
- 丰富了耐受Cr (VI) 的细菌 (例如Marinobacter,Planktosalinus),并提高了glnA和atoB基因的调节.
- 在停止Cr (VI) 暴露后,HAA系统的氨去除效率增加了17.1%,证明了自我恢复.
结论:
- 该HAA工艺具有固有的自我恢复能力,可以抵御 (VI) 应力.
- 微生物社区的适应和特定基因的上调有助于 (VI) 耐受性和系统弹性.
- 这项研究为在重金属污染废水处理中应用HAA提供了基础.
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