在高盐度条件下,微生物的消耗导致pH值显著增加:对盐洞穴中的储存的影响
Nicole Dopffel1, Kyle Mayers2, Abduljelil Kedir2
1NORCE Norwegian Research Center AS, Nygårdsgaten 112, 5008, Bergen, Norway. nicd@norceresearch.no.
Scientific reports
|June 29, 2023
概括
盐洞中的微生物消耗储存的 (H2),减少其体积. 然而,pH值的增加限制了这种微生物活动,这可能有利于储存的安全性和效率.
科学领域:
- 地质微生物学的生物.
- 储能 储能 储能 储能 储能 储能
- 生物地质化学生物地质化学
背景情况:
- 盐洞被认为是大规模的 (H2) 储存,以支持脱碳目标.
- 洞穴中的微生物活动可能会消耗H2,导致体积损失和H2S的产生.
- 了解高度环境中的微生物H2消耗率至关重要.
研究的目的:
- 在模拟的盐洞条件下调查微生物消耗的速度和程度.
- 评估微生物活动对储存和潜在副产品形成的影响.
- 评估微生物在盐水环境中的H2消耗的自我限制因素.
主要方法:
- 在不同的H2压力下培养型硫酸盐降解细菌 (Desulfohalobium retbaense) 和甲基生物 (Methanocalculus halotolerans).
- 在几个月内用100%的H2化盐洞盐水,并添加或不添加营养素.
- 监测H2的消耗,pH的变化和H2S的产量.
主要成果:
- 培养的微生物菌株和洞穴盐水微生物都消耗了H2.
- 微生物H2消耗率随着时间的推移而下降,与显著的pH值增加 (高达9.0) 相对应.
- 增加的pH导致H2S溶解,在某些情况下,H2损失高达12%.
结论:
- 盐洞中的减少硫酸盐的微生物消耗储存的.
- 微生物活动导致pH值增加,这可能会限制进一步的H2消耗.
- 这种pH缓冲效应可能有利于盐洞中的储存的长期稳定性.
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