头部空间体积反应器在发酵过程中对微生物群体结构的影响,以生产挥发性脂肪酸
Ylenia Di Leto1, Antonio Mineo2, Fanny Claire Capri1
1Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Viale Delle Scienze, Bldg. 16, 90128, Palermo, Italy.
Environmental science and pollution research international
|October 23, 2024
概括
减少污水污泥发酵中的头部空间显著增加了挥发性脂肪酸 (VFA) 的生产,这是迈向可持续生物塑料的关键一步. 这种优化增强了微生物活动,以有效地从废水中回收资源.
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:
- 污水处理厂产生污水污泥,造成处理挑战和环境问题.
- 为资源回收重新利用污泥符合循环经济原则,降低成本和环境影响.
- 从污泥发酵中获得的挥发性脂肪酸 (VFA) 是生物塑料的前体,为以石油为基础的塑料提供可持续的替代品.
研究的目的:
- 调查头部空间体积对微生物群落动态和无氧污水污泥发酵过程中的VFA产生的影响.
- 确定最佳的操作参数,以最大限度地提高试验规模发酵器中的VFA产量.
- 评估污泥发酵在生产生物塑料前体方面的潜力.
主要方法:
- 使用了一台225升试点工厂发酵器,使用来自大学污水处理厂的废弃污水污泥.
- 在两个不同的头空间体积下化污泥:40%和60%.
- 分析了微生物群体的组成,在发酵前和后使用metataxonomic分析.
- 使用气体染色学量化VFA产量.
主要成果:
- 40%的头部空间量导致VFA产量增加了10倍,而头部空间量为60%.
- 40%的头部空间调节了微生物群落,显著增加了产生VFA的细菌的相对丰度 (例如,蛋白质细菌,菌菌).
- 在40%的头部空间下,观察到细菌体和菌体的相对丰度下降,这表明对高效的VFA生产者进行了选择.
结论:
- 减少头部空间体积是优化从污水污泥发酵中生产VFA的高效策略.
- 这种方法促进了微生物群落的选择,以VFA合成为导向,这对于生物聚合物生产至关重要.
- 这些发现支持废水处理厂转变为循环生物炼油厂,用于可持续的生物塑料制造.
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