海洋阿纳莫克斯细菌对长期氧胺压力的反应:去除性能和微生物社区动态
Na Zhao1, Yanling Qiu1, Zhaopeng Qu1
1School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
Bioresource technology
|December 9, 2023
概括
海洋阿纳莫克斯细菌 (MAB) 可以耐受低氧胺水平,但被高剂量抑制. 长期暴露于基胺会破坏MAB颗粒,影响盐水废水处理.
科学领域:
- 环境微生物学环境微生物学
- 废水处理技术 废水处理技术
- 在Anammox的工艺过程中.
背景情况:
- 氧胺作为海洋菌 (MAB) 的基质在盐水废水处理中的作用仍然不清楚.
- 了解MAB对氧胺的反应对于优化去除过程至关重要.
研究的目的:
- 研究氧胺作为唯一基质对盐水废水中MAB的长期影响.
- 为了确定MAB对不同氧胺度的耐受性极限和反应机制.
主要方法:
- 在盐水废水中长期添加氧胺作为MAB培养的唯一基质.
- 监测MAB活动,氧胺去除效率和氨产量.
- 分析微生物群落结构 (Candidatus Scalindua的相对丰富性) 和细胞外聚合物质 (EPS) 生产.
- 评估氧胺对MAB颗粒完整性的影响.
主要成果:
- 耐受性高达5mg/L的MAB氧胺;较高的度 (40mg/L) 抑制了活性,导致去除效率低 (3%).
- 的最大产量 (2.88 mg/L) 发生在20 mg/L的氧胺,主要来自氧胺和氨酸不成比例.
- 坎迪达斯·斯卡林杜亚的相对丰度随着氧胺水平的增加而显著下降.
- MAB增加了EPS生产以减轻氧胺压力,但长期加载导致颗粒分解.
结论:
- 海洋阿纳莫克斯细菌对氧胺具有剂量依赖的反应,在高度下抑制和颗粒分解.
- 在压力条件下,氧胺不成比例会导致的产生.
- EPS生产是关键的抵抗机制,但MAB颗粒很容易受到盐水废水处理中长期暴露于氧胺的伤害.
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