通过尿素过氧化预处理增强废物活性污泥的酸性发酵:性能和机制
Jingnan Yang1, Wenming Wang2, Xianli Yang1
1College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha 410082, PR China.
Bioresource technology
|July 16, 2023
概括
尿素过氧化物 (UHP) 从废物活性污泥 (WAS) 中显著增加短链脂肪酸 (SCFA) 的产生. 这种新的方法增强了污泥分解和资源回收,为废水处理提供了可持续的解决方案.
科学领域:
- 环境科学与工程环境科学与工程
- 生物技术是生物技术.
- 废水处理 废水处理
背景情况:
- 优化废弃活性污泥 (WAS) 的无氧消化对于减少碳排放和稳定生物固体至关重要.
- 从WAS中回收资源,特别是短链脂肪酸 (SCFA),对于可持续的废水管理至关重要.
- 目前的方法在污泥分解和高效的SCFA生产方面面临挑战.
研究的目的:
- 调查尿素过氧化物 (UHP) 在增强WAS.SCFA生产中的有效性.
- 阐明UHP提高无氧处理性能的机制.
- 评估UHP对WAS资源回收的潜力.
主要方法:
- 在废弃活性污泥 (WAS) 中使用不同度的尿素过氧化物 (UHP).
- 对SCFA生产的分析,包括酸和酸的比例.
- 微生物社区分析和基因表达分析,以了解潜在的机制.
主要成果:
- 在UHP治疗中,SCFA的产量从436.9 mg COD/L大幅增加到3102.6 mg COD/L.
- 在SCFA中酸盐的比例显著从31.3%上升到54.1%随着UHP的应用.
- 机制调查确定了基基 (OH) 作为WAS分解的主要贡献者,其次是O2和尿素,与乙酸相关基因的上调和与酸相关基因的下调.
结论:
- 尿素过氧化物 (UHP) 是一种高效的药物,可以增强SCFA的产量和从WAS中回收资源.
- 通过特定的微生物和遗传途径,UHP加速了WAS分解,并促进了乙酸占主导地位的SCFA生产.
- 这些发现突出了UHP在改善无氧处理WAS的有希望的应用,以实现可持续的资源利用.
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