在不同温度下对高固体肥 (CM) 的无氧消化:肠道微生物群的效率,抑制和微生物群体的进化
Xujing Chen1, Qigui Niu1,2,3, Jingyi Li1
1China-America CRC for Environment & Health, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
Microorganisms
|April 26, 2025
概括
高固体和温度影响肥的无氧消化. 高的自由氨和挥发性脂肪酸减少甲,但增加VFA积累,特别是没有注射.
科学领域:
- * 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:
- *高固体肥的无氧消化 (AD) 提供了资源回收潜力.
- *基质过载和温度对AD性能和微生物过程的影响仍然不太清楚.
- * 有限的数据存在于CM消化过程中的代谢途径,有和没有注射.
研究的目的:
- * 为了研究温度,总固体 (TS) 和高固体CM对AD的注射的影响.
- *分析不同条件下的代谢变化和微生物群落转移.
- *为优化CM废物资源利用建立科学基础.
主要方法:
- *实验设计涉及四种温度 (4°C,35°C,55°C,75°C),不同的TS,和注射处理.
- *AD性能的表征,包括甲 (CH4) 生产和挥发性脂肪酸 (VFA) 积累.
- *利用EEM-FRI (激发发射矩阵-光区域集成) 分析辅酶F420和微生物社区分析.
主要成果:
- *高温增加了辅酶F420,而TS影响了微生物的产生.
- *高TS和温度的结合导致了高的自由氨 (FA) 和自由挥发性脂肪酸 (FVFA),抑制了CH4的产生并促进了VFA的积累 (在55°C时高达12g/L).
- * 肠道微生物群单独达到11g/L的VFA;交叉养的共生增强了CH4的产生 (35°C时68mL/gVS);高温有利于耐热细菌和减少微生物多样性.
结论:
- *温度和TS显著影响高固体CM消化的酸化效率.
- *注射策略和微生物共生在增强甲生产中起着至关重要的作用.
- *研究结果为优化无氧消化过程以利用肥资源提供了关键的见解.
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