光驱动的氧超和控制微藻-细菌颗粒污泥系统中的微生物弹性:碳中和废水处理的新型间歇调节策略
Liaofan Tang1, Yufen Xue2, Ning Shi2
1Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
Bioresource technology
|October 4, 2025
概括
间歇性光有效地管理微藻细菌颗粒污泥 (MBGS) 废水处理中的溶解氧和氧化应激. 这一策略增强了营养物质的去除,这对于无通风系统至关重要.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理技术 废水处理技术
- 可持续生物技术 可持续生物技术
背景情况:
- 微藻细菌颗粒污泥 (MBGS) 通过利用光合作用氧来提供碳中和的废水处理替代方案,消除了对通风的需求.
- 然而,过度的光线可以导致溶解氧 (DO) 过和氧化应激,从而对MBGS性能产生负面影响.
- 优化光线条件对于最大化MBGS系统的效率和稳定性至关重要.
研究的目的:
- 调查不同照明模式 (连续或间歇) 和光强度对96天内MBGS性能的影响.
- 评估间歇性照明在减轻光氧应激和增强营养除去方面的有效性.
- 确定与不同照明策略相关的关键微生物社区转变.
主要方法:
- 在96天的时间里,MBGS系统以400和800μmol/m2/s的强度连续和间歇照明.
- 监测了包括DO水平,活性氧物种 (ROS) 生产,营养物质去除效率 (NH4-N,TN,PO4-P) 和抗氧化酶活性在内的性能指标.
- 分析了微生物社区的组成,以确定功能性变化的转变.
主要成果:
- 两种强度的连续光线导致严重的DO积累 (>25 mg O2/L),ROS升高,营养物质的去除减少.
- 间歇性光有效调节DO,减轻ROS压力,增强抗氧化酶活性,恢复微生物功能.
- 在间歇性光下,营养物质去除效率高达NH4-N的99.2%,TN的81.5%,PO4-P的94.2%.
- 特定的属,如Dechloromonas,Pseudoxanthomonas和Pseudomonas在间歇性光线下得到了丰富.
结论:
- 间歇性照明是一种可行的策略,可以减轻无通风MBGS系统中的光氧应激.
- 优化的光循环增强了微生物的功能,并显著提高了营养物质的去除效率.
- 这种方法为使用MBGS技术的可持续和高效废水处理提供了一个有希望的解决方案.
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