在食品废弃物和污水污泥中进行现场间歇性微空气:性能,稳定性和微生物动态
Wachiranon Chuenchart1, Christelle Sawaya2, K C Surendra3
1Department of Molecular Biosciences and Bioengineering (MBBE), University of Hawai'i at Mānoa, USA; Department of Civil, Environmental and Construction Engineering (CECE), University of Hawai'i at Mānoa, USA; Quasar Energy Group, 2705 Selby Road, Wooster, OH 44691-4096, USA.
Bioresource technology
|March 17, 2025
概括
微空气增强了食品废物和污水污泥的无氧共消化 (AcoD),改善了生物气和甲产量. 这种方法通过优化 AcoD 性能,对城市废物管理有希望.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 废物管理 废物管理
背景情况:
- 污水污泥 (SS) 和食品废物 (FW) 的无氧共消化 (AcoD) 在城市环境中是可行的.
- 微空气可以改善水解和控制单消化中的酸化,但其对AcoD的影响尚不清楚.
研究的目的:
- 研究基于氧化降低潜力 (ORP) 的现场微空气对SS和FW的AcoD的影响.
- 评估微空气在共消化系统中的可行性和性能.
主要方法:
- 在ORP控制的微空气下,与SS和FW进行了AcoD实验.
- 评估了生物气和甲产量,挥发性固体 (VS) 的减少,以及微生物群落的转移.
- 测试了不同的FW:SS比率和运行参数,如有机载荷率和性.
主要成果:
- 微风化使生物气和甲的特定产量分别提高了21.1%和13.1%,FW:SS比率为60:40 (VS基础).
- 在有机载荷率为2.25gVS/L·d,度低于5000mgCaCO3/L时,可以达到最佳性能.
- 观察到Aminicenantes的相对丰度的变化,并确定了homoacetogenesis和acetoclastic methanogenesis作为关键的AcoD途径.
结论:
- 基于ORP的微空气是一种有利的策略,可以提高食品废物和污水污泥的AcoD.
- 微空气可以显著提高生物气和甲的生产,有助于更高效的废物转化为能源.
- 了解微生物动力学,特别是Aminicenantes的作用,对于优化AcoD过程至关重要.
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