挥发性脂肪酸生物生产使用从污泥中脱离的细胞外聚合物物质,用于碳源回收利用
1State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China.
Bioresource technology
|July 28, 2023
概括
这项研究通过使用新的预处理方法,从废物活性污泥 (WAS) 中增强挥发性脂肪酸 (VFA) 的产生. 该过程改善了废水处理的碳源回收,同时防止了污泥排水问题.
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:
- 城市污水处理面临着过多的废物活性污泥 (WAS) 和不足的碳来源 (CS) 生物去除 (BNR) 的挑战.
- 从WAS生产挥发性脂肪酸 (VFA) 是一个潜在的解决方案,但目前的方法效率低,污泥脱水问题存在.
研究的目的:
- 开发一种有效的方法,从WAS.中回收细胞外聚合物质 (EPS).
- 利用回收的EPS用于高质量的VFA生物生产.
- 调查有效的VFA生产和污泥脱水能力背后的微生物机制.
主要方法:
- 从污泥中提取细胞外聚合物 (EPS),使用低温热水解 (LTH) 和高速气旋 (HSHC) 预处理.
- 回收的EPS被用作热友发酵中VFA生物生产的基质.
- 进行了微生物社区分析,以了解VFA积累的机制.
主要成果:
- 在LTH和HSHC预处理中,有效地回收了用于VFA生物生产的EPS.
- 通过回收EPS的热友发酵实现了高效的VFA生物生产.
- 微生物分析揭示了通过生物转化EPS驱动VFA积累的跨物种相互作用网络.
结论:
- 开发的过程有效地从WAS中产生VFA,为BNR提供可持续的碳来源.
- 这种方法避免了通常在其他VFA生产技术中看到的污泥脱水能力的恶化.
- 该研究强调了EPS回收和微生物相互作用对先进废水处理解决方案的潜力.
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