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在低温下通过MnO₂修改的生物炭增强脱化:性能评估和机制性见解

Hao Qin¹, Min Nie¹, Fucheng Guo¹

¹Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China.

Bioresource technology

|August 5, 2025

概括

这项研究引入了二氧化改性生物炭 (MBC),以促进在寒冷环境中的微生物脱. 在寒冷条件下,MBC显著增强了去除和酶活性,为低温脱提供了一个实用的解决方案.

科学领域:

环境科学环境科学
微生物学微生物学
生物技术是生物技术.

背景情况:

低温阻碍微生物脱,这对于寒冷气候中的去除至关重要.
开发有效的冷气候脱化策略对于环境修复至关重要.

研究的目的:

研究二氧化修饰生物炭 (MBC) 在低温下增强微生物脱的功效.
阐明MBC在寒冷条件下改善去除的机制.

主要方法:

用二氧化 (MnO2) 修改生物炭以产生MBC.
评估MBC的物理性质 (表面积,孔积) 和电子传输能力.
量化总 (TN) 去除效率和关键酶活性 (与糖解和脱相关).
分析电子运输系统活动,ATP和NADH水平.
进行柱体实验,以评估MBC在脱生物过器中的性能.

主要成果:

与未经修改的生物炭相比,MBC显著增加了特定表面积 (185%),毛孔体积 (88%) 和电子传输能力 (30%).
MBC提高了TN去除效率,达到3.23 mgN·gVSS−1·h−1.
糖溶性酶 (HK,PFK,PK) 和脱酶 (Nar,Nir,Nos) 的活性,以及电子运输系统活性,ATP和NADH水平显著增加.
微生物分析显示了Acidovorax和Tolomonas的丰富,这表明微生物氧化还原循环的作用.
专实验显示,在MBC增强的生物过器中,TN去除效率提高了33%.

结论:

在低温下提高微生物脱效率,MBC是一种有前途的材料.
增强的性能归因于改善的生物炭特性,增强的微生物代谢活动,以及潜在的氧化还原循环.
MBC证明了在改善冷气候废水处理系统中提取的实际应用.

关键词:

电子运输是一种电子运输.酶活性的酶活动.葡萄糖溶解是什么? 葡萄糖溶解的氧化还原循环.移除的方法移除的方法

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