用微生物驱动的制厂污泥对脂肪酸生产的价值化:解开微生物群活动和功能冗余
Barbara Tonanzi1,2, Alessio Massimi1,3, Francesco Valentino4
1Water Research Institute, National Research Council of Italy, CNR-IRSA, Monterotondo, Rome, Italy.
Frontiers in microbiology
|October 22, 2025
概括
这项研究探讨了利用微生物群落将皮革厂污泥转化为有价值的短链脂肪酸 (SCFA). 不同的预处理和条件揭示了可持续废物管理和SCFA生产的最佳途径.
科学领域:
- 环境微生物学 环境微生物学
- 工业生物技术 工业生物技术
- 废物管理 废物管理
背景情况:
- 皮革厂污泥由于含有危险的有机和无机化合物,给环境带来了重大挑战.
- 短链脂肪酸 (SCFA) 的生物生产提供了一个可持续且具有成本效益的废物管理策略.
- 了解微生物动态对于优化从复杂工业废物中生产SCFA至关重要.
研究的目的:
- 研究用于SCFA生产的制厂污泥无氧发酵过程中的微生物群体组成和动态.
- 评估液压保留时间 (HRT) 和温度对SCFA产量和微生物活性的影响.
- 评估氧化 (Ox) 和热 (Th) 预处理对提高有机物质生物利用性的有效性.
主要方法:
- 在不同的HRT和温度下 (美索菲尔和热索菲尔) 制厂污泥的无氧发酵.
- 氧化 (Ox) 和热 (Th) 预处理的应用,以提高基质的生物降解性.
- 微生物学分析包括光现场混合/催化报告器沉积-光现场混合 (FISH/CARD-FISH) 和生物分子方法.
主要成果:
- 半氧反应器实现了稳定的SCFA产量,而Ox_8 (更长的HRT) 显示了更高的有机物转化和细菌活性.
- 热友Th反应器显示出最高的SCFA产量,特别是在较长的HRT (0.4g CODSCFA/g VS).
- 微生物群落的差异很大:Ox系统由Actinobacteria, Bacteroidetes和Firmicutes (与Proteiniphilum) 主导,而Th反应器则由Coprothermobacteraeota和Firmicutes (与Coprothermobacter) 组成.
结论:
- 牛和预处理,加上优化的HRT和温度,对于从制厂污泥中生产SCFA是有效的.
- 特定的微生物群落,如Ox系统中的Proteiniphilum和Th系统中的Coprothermobacter,在SCFA合成中发挥关键作用.
- 该研究强调了微生物的适应性和功能冗余性,为可持续的制废物利用提供了关键的见解.
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