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在市政废水中以和溶解氧驱动的高速率和超稳定的部分化

Qiongpeng Dan¹, Xiyao Li¹, Fangzhai Zhang¹

¹National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.

Bioresource technology

|September 11, 2024

概括

在废水处理中实现稳定的部分化 (PN) 是一个挑战. 这项研究使用了和溶解氧 (DO) 策略来实现超快的PN,大大增加了氨氧化细菌 (AOB) 的活性.

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:

部分化 (PN) 对于废水处理中的去除至关重要.
在低强度的主流条件下实现稳定和高速率的PN在技术上是困难的.
当前的方法往往在效率和稳定性方面扎.

研究的目的:

调查市政废水的超快速和稳定的部分化 (PN) 战略.
探索溶解氧 (DO) 供应在促进PN的作用.
了解氨氧化细菌 (AOB) 和氧化细菌 (NOB) 种群的动力变化.

主要方法:

实施和溶氧 (DO) 供应战略.
在200天内监测PN率和化物积累.
对氨氧化细菌 (AOB) 和氧化细菌 (NOB) 活动比率的动态分析.
对温度和负载变化的弹性进行评估.

主要成果:

超快速的主流PN在8天内实现,达到超过1.0公斤N m-3d-1.1.
稳定的PN保持超过200天,酸盐积累率为98.5%.
对季节性温度 (16.0-25.6 °C) 和负载 (40-80 mg N/L) 波动的经过证明的弹性.
观察到AOB与NOB活动比率增加了159.1倍,导致AOB的主导地位和NOB淘汰.

结论:

和的DO供应有效地实现了超快速和稳定的主流PN.
促进氨氧化细菌 (AOB) 的活性是启动和稳定PN的关键,而不是仅仅抑制酸盐氧化细菌 (NOB).
这一战略为城市废水处理中有效的除提供了一个有希望的方法.

关键词:

氨氧化率是氨的氧化速度.溶解的氧气是一种溶解的氧气.主流废水是主要的废水.消除NOB是为了消除NOB.亚酸盐的积累亚酸盐的积累

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