通过对叶酸进行剂量注射,有效地缓解在高速度的anammox反应堆中的颗粒污泥漂浮
Dongdong Xu1, Chao Pan2, Sitong Liu3
1Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, China; Australian Centre for Water and Environmental Biotechnology, The University of Queensland, St. Lucia, Queensland 4072, Australia.
Water research
|August 14, 2024
概括
添加叶酸有效地控制了在anammox系统中的颗粒性污泥漂浮. 这一策略通过减少细胞外聚合物物质来降低污泥漂浮潜力,从而提高系统稳定性.
科学领域:
- 环境生物技术环境生物技术
- 微生物生态学 微生物生态学
背景情况:
- 颗粒浮动对于高速度的氧化 (Anaerobic Ammonium Oxidation) 过程来说是一个主要的挑战.
- 了解污泥漂浮的原因和控制对于优化anammox系统至关重要.
研究的目的:
- 研究叶酸作为一种新的策略,用于控制在anammox系统中的颗粒污泥漂浮.
- 阐明叶酸对污泥漂浮和系统性能影响背后的机制.
主要方法:
- 长期运行anammox颗粒污泥反应堆,添加叶酸.
- 颗粒性污泥的表征,包括生理化学分析和元基因组分析.
主要成果:
- 叶酸添加 (8 mg/L) 在高负荷下 (12.3 kg-N/m3·d) 显著降低了67.1%的污泥漂浮潜力.
- 叶酸降低了细胞外聚合物物 (EPS),主要是蛋白质,缓解毛孔堵塞并促进气释放.
- 甲基因组分析显示,异形细菌和共生体之间的协同相互作用减弱,导致EPS排泄减少.
结论:
- 叶酸添加是一种可行且有效的方法,用于控制在anammox工艺中的颗粒性污泥漂浮.
- 该机制涉及由于改变的微生物相互作用而减少EPS产量,改善污泥沉降能力和系统稳定性.
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