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Evaluating approaches for sustaining methane production from coal through biogasification

机译：评价通过生物气化来维持煤甲烷生产的方法

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摘要

Biogenic methane production from coal has been demonstrated to be a universal process at places where coal and a suitable microbial community co-exist. Through stimulating activities of in situ microbial communities, higher methane production rate can be achieved compared to those without biostimulation. However, it is commonly observed that upon stimulation either in situ or ex situ, methane production will increase but halt after certain period of time. This study was thus designed to identify reasons for this behavior and provide insight on how to sustain coal biogasification over longer durations. It was found out that after methane production rate stopped increasing, coal, at the studied loading, was still bioavailable. The headspace gas and the coal degradation intermediates were not toxic or inhibitory to the bioconversion process. Instead, lack of nutrients, especially those provided through yeast extract and peptone was critical for sustained methane release from coal. Although these two nutrients could be used as carbon sources, negligible amount of methane was observed from control reactors without coal. At least, these were true for the microbial community and the bituminous coal investigated here. Thus, to convert coal to methane continuously at a high rate that is possible, site-specific nutrient solution needs to be supplemented periodically. Published by Elsevier Ltd.
机译：事实证明，在煤炭和合适的微生物群落共存的地方，煤炭生产生物甲烷是普遍的过程。通过刺激原位微生物群落的活动，与不进行生物刺激的人相比，可以获得更高的甲烷生产率。然而，通常观察到，在原位或非原位刺激后，甲烷产量将增加，但在一定时间段后会停止。因此，本研究旨在确定这种现象的原因，并提供有关如何在更长的时间内维持煤生物气化的见识。结果发现，在甲烷生产速率停止增加之后，在研究的负荷下煤仍然具有生物利用度。顶空气体和煤降解中间体对生物转化过程无毒或无抑制作用。相反，缺乏营养，特别是通过酵母提取物和蛋白ept提供的营养，对于持续从煤中释放甲烷至关重要。尽管可以将这两种营养素用作碳源，但在没有煤的控制反应堆中观察到的甲烷量可忽略不计。至少对于微生物群落和这里研究的烟煤来说，这些都是正确的。因此，为了尽可能高速率将煤连续不断地转化为甲烷，需要定期补充特定地点的营养液。由Elsevier Ltd.发布

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  • 来源
    《Fuel》 |2017年第15期|233-240|共8页
  • 作者

    Zhang Ji; Liang Yanna;

  • 作者单位

    Southern Illinois Univ, Dept Civil & Environm Engn, 1230 Lincoln Dr, Carbondale, IL 62901 USA;

    Southern Illinois Univ, Dept Civil & Environm Engn, 1230 Lincoln Dr, Carbondale, IL 62901 USA|Southern Illinois Univ, Mat Technol Ctr, 1230 Lincoln Dr, Carbondale, IL 62901 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bituminous coal; Microbial community; Sustained methane release; Biogasification; Nutrient solution;

    机译：烟煤;微生物群落;甲烷持续释放;生物气化;营养液;

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