在连续流动下恢复部分脱/安纳莫克斯的机制见解:平衡酸盐供应和微生物竞争
Rui Du1, Cong Li1, Shenbin Cao2
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China.
Environmental research
|September 4, 2025
概括
在干扰后,与anammox (PD/A) 系统相结合的部分脱复活是很困难的. 使用新鲜污泥进行生物增量是恢复连续流系统中去除效率的关键.
科学领域:
- 环境微生物学
- 污水处理工程
- 生物地化学循环
背景情况:
- 部分脱与anammox (PD/A) 相结合是一种低碳,高能效的城市废水脱策略.
- 由于复杂的微生物动力学,在干扰后重新激活PD/A系统,特别是在连续流反应器中,具有挑战性.
研究的目的:
- 系统地评估使用存储颗粒污泥的连续流 PD/A 工艺的回收动态.
- 在连续流条件下确定PD/A系统重新激活的关键因素和微生物反应.
主要方法:
- 进行了七个操作阶段,操纵影响酸盐,碳剂量,并采用生物增量.
- 分析了污泥形态,主要的微生物种群和关键的过程参数,如去除效率 (NRE).
- 在各种回收阶段评估酸盐的积累和消耗率.
主要成果:
- 无化细菌的恢复速度比亚纳摩克斯细菌快,限制了酸盐的可用性.
- 间歇性碳剂量改善了酸盐到酸盐的转化,但anammox的回收仍然不理想.
- 使用新鲜PD/A污泥的生物增量显著加快了回收,达到88.2%的NRE.
- 微生物群落的转变包括Chloroflexi和Zoogloea的丰富,影响了过程稳定性和碳竞争.
结论:
- 酸盐的可用性,不仅仅是存在,对于PD/A系统的恢复至关重要.
- 微生物对碳来源的竞争和污泥形态变化影响了系统的稳定性.
- 在连续流应用中,生物增强是一种有效的PD/A系统再激活策略.
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