碳和比对污水污泥微生物群的作用,用于生产聚酸酸酸盐
Ylenia Di Leto1, Antonio Mineo2, Fanny Claire Capri1
1Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Viale delle Scienze, Ed. 16, 90128, Palermo, Italy.
Journal of environmental management
|January 29, 2025
概括
在污水污泥发酵中优化碳 (C/N) 比率可以提高聚酸酸盐 (PHAs) 的产量. 较高的C/N比率有利于产生PHA的细菌,增加了废物中的生物塑料产量.
科学领域:
- 环境微生物学 环境微生物学
- 生物技术是生物技术.
- 废物管理 废物管理
背景情况:
- 聚酸酸 (PHAs) 是从微生物发酵中获得的可生物降解生物塑料.
- 污水污泥发酵为PHA生产提供了一个可持续的途径.
- 空气性盛宴-麻醉性饥饿循环丰富了产生PHA的微生物.
研究的目的:
- 调查不同碳与 (C/N) 比率对污水污泥微生物群结构的影响.
- 通过C/N比率调整调节微生物群落来优化PHA生产.
- 为了将C/N比率与产生PHA的微生物的丰度和PHA产量相关联.
主要方法:
- 使用废弃活性污泥进行试点规模研究.
- 实施有氧盛宴-麻醉饥饿循环策略.
- 监测PHA生产的C/N比率为3.5,2和1gCOD/gN.
- 对微生物群落结构进行metataxonomic分析以描述其特征.
主要成果:
- 较低的C/N比率 (1和2g COD/g N) 导致PHA产量减少 (20%和24% w/w).
- 在C/N比率为3.5gCOD/gN的情况下,获得了最高的PHA产量 (26%w/w).
- 经过metataxonomic分析,PHA产生的细菌 (例如,蛋白质细菌) 在3.5gCOD/gN的比率上呈现出更高的丰度.
- 降低C/N比率导致真菌的丰富性和多样性增加.
结论:
- C/N比率是调节污水污泥微生物群的关键因素,用于增强PHA生产.
- 较高的C/N比率 (3.5g COD/g N) 与增加的PHA产量和PHA产生细菌的丰富性正相关.
- 对微生物社区动态的理解和对生物塑料生产的生物过程的优化有价值的metataxonomic分析.
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