在连续流动反应堆中,在低pH值下成功运行化颗粒:化性能,颗粒稳定性和微生物群落
Han Zhou1, Jing Long1, Manyu Qin1
1School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
Journal of environmental management
|July 11, 2024
概括
这项研究表明,有氧颗粒污泥可以在废水处理中实现高酸性化. 氧化颗粒在酸性条件下表现出更好的稳定性和形态,为低性废水提供了有希望的解决方案.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 酸性化是一种新的废水处理工艺,用于低度的影响.
- 有氧颗粒污泥 (AGS) 技术因其效率而受到关注.
研究的目的:
- 研究AGS用于高速酸化的可行性和性能.
- 在酸性条件下分析微生物群落的转移和颗粒特征.
主要方法:
- 在低pH (<6.5) 时使用AGS的连续流反应堆运行.
- 测量氨氧化率和特定生物质活动.
- 通过16S rRNA基因测序分析化物积累,颗粒形态,细胞外聚合物质 (EPS) 和微生物群体组成的分析.
主要成果:
- 实现了高速酸化,体积氧化率为0.4-1.2 kg/m3·d).
- 在pH > 6时观察到稳定的部分化 (>85%效率),pH 6.0以下消失.
- 在酸性压力下,证明了改善颗粒形态和增加EPS分泌 (多糖).
- 确定了主导氨氧化细菌的转变,从Nitrosomonas europaea转变为Nitrosomonas mobilis,而Candidatus Nitrospira defluvii仍然占主导地位.
结论:
- 有氧颗粒污泥是一种稳定和有效的解决方案,用于高速酸化.
- 酸性条件可以增强AGS稳定性和微生物自我保护机制.
- 微生物社区的动态,特别是氨氧化细菌的转变,对于酸性化性能至关重要.
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