耐有机负荷和活性污泥在碳酸生产的共同发酵中的变化
N Perez-Esteban1, J Vives-Egea1, J Dosta1
1Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
Bioresource technology
|June 26, 2024
概括
废弃物活性污泥和食品废弃物共发酵中的有机加载率的增加会改变酸和乙醇等发酵产品. 微生物变化影响这些变化,通过监测可以检测到.
科学领域:
- 环境微生物学 环境微生物学
- 生物化学工程 生物化学工程
- 废物管理 废物管理
背景情况:
- 废物活性污泥 (WAS) 和食品废物的酸性共发酵是废物回收利用的关键过程.
- 了解有机装载率 (OLR) 和原料成分等操作参数的影响对于优化这一过程至关重要.
- 之前的研究集中在单个原料发酵或不同的温度调节.
研究的目的:
- 调查增加的有机载荷率 (OLR) 和废弃活性污泥 (WAS) 的变化对连续美索菲尔共发酵的产品概况的影响.
- 为了确定发酵产量是否在改变条件下受到损害.
- 了解微生物群落的转变及其在产品形成中的作用.
主要方法:
- 连续介质性发酵器在不同的OLR下运行 (11 gVS/(L·d) 和18 gVS/(L·d)).
- 对于每个OLR,使用两种类型的WAS来评估原料的影响.
- 对发酵产品 (酸,乙醇) 和微生物结构进行了监测.
- 进行了发酵后测试,以早期检测特定的微生物事件.
主要成果:
- 增加OLR从11到18gVS/{L·d) 将发酵产品的形状从酸,黄油酸和酸转移到酸,乙醇和酸.
- 尽管OLR增加,但发酵产量保持稳定 (∼300 mgCOD/gVS).
- 在WAS的变化引入了食用酸的甲基生物,其增长只因较高的OLR而被延迟.
- 逆转OLR恢复了原来的发酵产品形状.
结论:
- 在WAS和食品废弃物共发酵中,OLR是影响产品概况的重要因素.
- 微生物群落的转变,特别是食用乙酸的甲基生物体的引入,在产品的分销中起着至关重要的作用.
- 微生物监测为早期检测发酵途径的变化提供了有效的工具,使过程控制成为可能.
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