食品废弃物生物炼油厂的热增强固体液体分离工艺:模拟固体残留物的无氧消化
Agata Gallipoli1, Francesca Angelini1, Stefania Angelini1
1National Research Council of Italy, Water Research Institute, CNR-IRSA, Rome, Italy.
Frontiers in bioengineering and biotechnology
|February 19, 2024
概括
食品废弃物 (FW) 的热预处理通过无氧消化增强了生物甲的生产. 优化液压保留时间 (HRT) 对于防止酸化和确保有效地从FW残留物中回收能量至关重要.
科学领域:
- 生物化学工程 生物化学工程
- 环境科学 环境科学
- 废物管理 废物管理
背景情况:
- 食品废弃物 (FW) 通过生物化学转化提供了重要的价值化机会.
- 综合热和生化过程是最大限度地从FW回收资源的关键.
- 优化FW预处理对于高效的下游转换至关重要.
研究的目的:
- 评估热预处理对FW转化为有价值的化学品和生物甲的影响.
- 评估半连续发酵和无氧消化对FW分量的性能.
- 确定从预处理的FW残留物生产生物甲的最佳运行条件.
主要方法:
- 为FW实施上游热预处理和固体液体分离装置.
- 进行液体部分的半连续发酵和固体部分的无氧消化.
- 分析不同水力保留时间 (HRT) 的甲产量,可溶化学氧需求 (COD) 和微生物社区动态.
主要成果:
- 热预处理增加了固体残留中的可溶性COD,与原始残留 (0.29 Nm3CH4 kg-1VSfed) 相比,增加了甲产量 (0.33 Nm3CH4 kg-1VSfed).
- 使用预处理残留物较低的HRT (20d) 增加了酸化风险,而40d的HRT为预处理残留物和原始残留物产生了类似的甲产量 (0.33Nm3CH4 kg-1VSfed).
- 在预处理残留物反应堆中存在性甲原体和性细菌,可以在最佳HRT时防止酸化.
结论:
- 热预处理是一种可行的策略,可以提高食品废弃物固体残留物的生物甲产量.
- 优化HRT对于预处理食品废物的稳定无氧消化至关重要,防止酸化.
- 食品废弃物固体残留物是适合无氧消化的基质,其特点是低惰性分数.
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