在各种pH条件下评估H2S-去除生物片的效率和微生物多样性
Abbas Abbas Rouhollahi1, Minoo Giyahchi1, Seyed Mohammad Mehdi Dastgheib2
1Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
Microbial cell factories
|May 28, 2024
概括
甲基生物化过器 (BTF) 有效地去除硫化 (H2S). 这项研究优化了BTF对H2S生物硫化性能,确定了控制工业空气污染的最佳条件和微生物群落.
科学领域:
- 环境生物技术 环境生物技术
- 生物反应器工程 生物反应器工程
- 微生物生态学 微生物生态学
背景情况:
- 硫化 (H2S) 是工业过程中常见的空气污染物.
- 生物过器 (BTF) 是一个有前途的技术,用于去除H2S.
- 优化BTF性能需要了解pH值和微生物群落的影响.
研究的目的:
- 研究BTF在不同pH条件下去除H2S的运行效率.
- 在BTF中分析与H2S生物硫化相关的微生物种群.
- 为了确定最大H2S去除和消除能力的最佳条件.
主要方法:
- 三个平行BTF在光合,中性和酸性pH条件下运行.
- 实验涉及减少空床保留时间 (EBRT) 和增加H2S输入度.
- 扫描电子显微镜 (SEM) 和下一代测序 (NGS) 用于微生物分析.
主要成果:
- 在60秒的EBRT下,在氧化条件下达到最大的H2S去除效率 (91%) 和消除能力 (179.5g S-H2S m−3 h−1)
- 微生物群体分析显示,在pH条件下,存在着不同的主导类型 (甲基蛋白细菌,贝塔蛋白细菌,酸性细菌).
- 在酸性BTF (aBTF) 条件下观察到较低的细菌多样性,而在中性友好性BTF (nBTF) 和环性BTF (haBTF) 条件下则较低.
结论:
- 使用BTFs的H2S去除中,Haloalkaliphilic条件最有效.
- 在特定的pH条件下优化BTF运行可以显著提高生物硫化.
- 了解微生物群落的转变对于设计高效的H2S减排系统至关重要.
相关概念视频
01:28Antimicrobial Effectiveness
2.3K
The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
2.3K
01:26Microbial Bioremediation of Hydrocarbons
150
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to...
150
01:28Microbial Bioremediation of Pesticides
85
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...
85