亚纳莫克斯颗粒污泥的氧气诱导进化解释了其在保存过程中的独特反应
Leiyan Guo1, Chao Pan1, Junwei Wu2
1Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, China.
Water research
|September 20, 2024
概括
氧气通过在开放系统中破坏细胞结构,对anammox颗粒污泥 (AnGS) 的保存产生负面影响. 密封系统促进休眠状态,为anammox技术应用更好地保护AnGS.
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
- 无氧氨氧化氧化无氧氨氧化.
背景情况:
- 保存anammox颗粒污泥 (AnGS) 对anammox技术至关重要.
- 在保存期间氧气对AnGS的长期影响需要进一步研究.
研究的目的:
- 在开放 (氧化) 和密封 (减少) 条件下模拟保存时,研究氧气对AnGS的影响.
- 阐明AnGS对不同氧气水平的反应的基本机制.
主要方法:
- 两个模拟保存系统的比较:开放式与密封式.
- 溶解氧 (DO) 和氧化降解潜能 (ORP) 的分析.
- 评估AnGS活动,形态,结构,细菌群落,生存和抗氧化.
主要成果:
- 开放系统:高DO和ORP,产生活性氧物种,破坏细胞膜,降低AnGS活性.
- 密封系统:没有可检测的DO,低ORP,AnAOB休眠状态,保存的颗粒结构,更高的AnAOB丰度和增加的活细胞比率.
- 两种系统都显示AnGS活动降低,但密封系统显示污泥特性更好地保存.
结论:
- 在AnGS保存过程中暴露于氧气会导致氧化损伤和活性降低.
- 密封的保存系统,创造一个减少的环境,更有效地保持AnGS的完整性和可行性.
- 研究结果为优化ANGS在anammox应用中的保护策略提供了指导方针.
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