通过酸盐与热水解预处理相结合,从废弃活性污泥中增强甲生产
Bing Guo1,2, Jiachen Zeng2, Yuchi Hao2
1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
概括
酸盐和热水解预处理显著增加了废弃活性污泥中的甲产量. 这种联合方法提高了污泥的生物降解性和微生物活性,从而提高了生物气产量.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 废弃活性污泥 (WAS) 管理对于环境可持续性至关重要.
- 无氧消化是处理WAS和回收沼气的关键过程.
- 从WAS无氧消化中优化甲生产需要先进的预处理方法.
研究的目的:
- 调查酸盐 (PF) 和热水解 (TH) 预处理对WAS的甲生产的协同效应.
- 确定PF-TH联合预处理的最佳条件,以最大限度地提高甲产量.
- 阐明增强甲生产背后的机制,包括污泥分解,生物降解性和微生物社区转移.
主要方法:
- 泥样本在不同的条件下使用酸盐和热水解的组合进行预处理.
- 使用无氧消化试验测量了甲产量.
- 通过各种分析技术评估了泥的分解和生物降解性.
- 使用分子方法分析了微生物社区的组成.
主要成果:
- PF-TH联合预处理对甲生产产生了显著的协同效应.
- 在最佳条件下 (0.05 g/g TSS PF 和80 °C TH 30 分钟) 甲产量增加了约36%.
- 增强的甲产量归因于改善的污泥分解和生物降解性.
- PF-TH处理导致无氧消化相关微生物的丰富,增加了它们的丰富性.
结论:
- 联合PF和TH预处理是一种有效的策略,可以增强WAS的甲生产.
- PF和TH的协同作用改善了污泥属性和微生物活动,以改善生物气回收.
- 这种方法提供了一个有前途的途径,通过增强无氧消化,从污泥中回收资源.
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