无氧持续时间对逆转AAO过程中的生物去除的影响 (无氧-无氧-氧)
Ya-Nan Luan1, Yue Yin1, Gongfa Chang2
1School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China.
Environmental science and pollution research international
|September 13, 2023
概括
在反向无氧-无氧-有氧 (RAAO) 过程中优化无氧持续时间可以增强生物去除. 长时间的无氧期会引发"饥饿反应",增加微生物活动和P去除效率,特别是特定的挥发性脂肪酸比率.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理工程 废水处理工程
- 生物化学工程 生物化学工程
背景情况:
- 生物去除对于防止肥胖至关重要.
- 反向无氧-无氧-有氧 (RAAO) 过程为增强营养去除提供了一个替代方案.
- 了解无氧持续时间等操作参数的影响是优化RAAO性能的关键.
研究的目的:
- 为了研究不同无氧持续时间对RAAO过程中 (P) 去除效率的影响.
- 为了评估不同挥发性脂肪酸 (VFA) 比率对不同无氧条件下的P去除的影响.
- 阐明底层的微生物机制,包括聚酸酸 (PHAs) 的储存和能量代谢,控制P的去除.
主要方法:
- 使用的合成废水与受控的VFA比率 (15%,30%,60%) 和真正的废水.
- 监测 (P) 度,多基酸盐 (PHAs),脱酶活性 (DHA),多酸盐激酶 (PPK),电子转移系统 (ETS) 和腺5-三酸盐 (ATP) 作为关键指标.
- 在RAAO过程中,系统地改变了无氧持续时间 (3,4和6小时).
主要成果:
- 对于15%,30%和60%的VFA比率,在3,4和6小时的无氧持续时间观察到最优的P去除效率.
- 虽然无氧持续时间影响了PHA的储存和P的释放,但更高的PHA积累并不能保证更好的P去除效率.
- 由DHA,PPK,ETS和ATP表示的微生物活性随着延长无氧持续时间显著增加,特别是在4小时以30%的VFA比率,与峰值P去除相关.
- 实际的废水实验证实了研究结果的可重复性,支持了该理论.
- 饥饿的反应 饥饿的反应
- 一个现象,一个现象.
结论:
- 无氧持续时间是优化RAAO系统中生物去除的关键操作参数.
- 这是一个很棒的节目,这是一个很棒的节目.
- 饥饿的反应 饥饿的反应
- ,在长时间无氧暴露后,微生物活动增加的特征,对于有效的P去除至关重要.
- 结果为RAAO过程的设计和运营策略提供了宝贵的见解,以提高去除.
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