从废弃活性污泥和食品废弃物中以温度为驱动的碳酸生产:共同发酵性能和微生物动力学
N Perez-Esteban1, J Vives-Egea1, M Peces1
1Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
Waste management (New York, N.Y.)
|February 24, 2024
概括
研究废弃活性污泥 (WAS) 和食品废弃物 (FW) 的连续共发酵,发现温度对挥发性脂肪酸 (VFA) 生产和微生物群体产生重大影响. 溶解和发酵的最佳条件产量各不相同,在不同的温度下具有不同的VFA配置文件.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 微生物学 微生物学
背景情况:
- 废物活性污泥 (WAS) 和食品废物 (FW) 的连续共发酵是废物回收利用的一个有前途的方法.
- 了解操作参数的影响,如温度,对于优化这一过程至关重要.
- 微生物社区的动态在发酵效率方面发挥着重要作用.
研究的目的:
- 调查温度对WAS和FW连续共发酵的长期影响.
- 分析温度对发酵性能的影响,包括溶解和挥发性脂肪酸 (VFA) 生产.
- 描述不同温度状态下的微生物群体结构.
主要方法:
- 在25,35,45和55°C进行了WAS和FW (70:30%VS基) 的连续共发酵.
- 有机载荷率维持在11gVS/L·d,液压保留时间为3.5天.
- 进行了微生物社区分析,以了解温度和WAS源的影响.
主要成果:
- 溶解产量在45°C (575±68毫克COD/gVS) 时最高,而发酵产量在55°C (425±28毫克COD/gVS) 时最高.
- 温度显著影响了VFA概况;55°C有利于酸和黄油酸,而35°C也包括酸.
- 在每个温度下观察到不同的微生物群落,其中WAS微生物群发挥着关键作用. 在35°C时观察到酸的消耗,这可能是由于甲素的扩散.
结论:
- 温度是影响WAS和FW共发酵的效率和产品概况的关键因素.
- 溶解的最佳温度 (45°C) 和发酵产量 (55°C) 不同,这表明了权衡.
- 微生物群落的组成,特别是来自WAS的甲基生物的存在,显著影响了VFA的产生,并且可以导致在较低的温度 (35°C) 上的基质损失.
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