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首页> 外文期刊>Environmental Science & Technology >Comparison of Carbon Dioxide with Anaerobic Digester Biogas as a Methanogenic Biocathode Feedstock
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Comparison of Carbon Dioxide with Anaerobic Digester Biogas as a Methanogenic Biocathode Feedstock

机译：厌氧蒸煮沼料二氧化碳与甲状腺生物病灶原料的比较

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摘要

BES biogas upgrading studies have typically used bicarbonate or commercial gas mixtures as a biocathode substrate instead of anaerobic digester biogas. Therefore, the objective of this study was to (ⅰ) compare the performance of a methanogenic BES between CO_2-fed and biogas-fed cycles; (ⅱ) investigate possible factors that may account for observed performance differences; and (ⅲ) assess the performance of a biogas-fed biocathode at various applied cathode potentials. The maximum 1-d CH_4 production rate in a biogas-fed biocathode (3003 mmol/m~2-d) was 350% higher than in a CO_2-fed biocathode (666 mmol/m~2-d), and the biogas-fed biocathode was capable of maintaining high performance despite a variable biogas feed composition-Anode oxidation of reduced gases (e.g., CH_4 and H_2S) from biogas may theoretically contribute 4% to 3S% of the total charge transfer from anode to cathode at applied cathode potentials of -0.80 to -0.55 V (vs SHE). The introduction of biogas did not significantly change the biocathode archaeal community (dominated by a Methanobrevibacter sp. Phylotype), but the bacterial community shifted away from Bacteroidetes and toward Proteobacteria, which may have contributed to the improved performance of the biogas-fed system. This study shows that anaerobic digester biogas is a promising biocathode feedstock for BES biogas upgrading.
机译：BES沼气升级研究通常使用碳酸氢盐或商业气体混合物作为生物病态底物而不是厌氧消化物沼气。因此，本研究的目的是（Ⅰ）比较CO_2喂养和沼气喂循环之间的甲烷酵母的性能; （Ⅱ）调查可能占观察到的性能差异的可能因素; （Ⅲ）评估在各种施加的阴极电位下沼气喂养生物潮汐的性能。沼气喂食生物灶的最大1-D CH_4生产率（3003mmol / m〜2-d）高于CO_2喂养生物陶器（666mmol / m〜2-d）和沼气 - 喂养生物疗法能够保持高性能，尽管可变沼气饲料组合物 - 阳极氧化来自沼气的降低的气体（例如，CH_4和H_2s）可以从施加的阴极电位的阳极到阴极的总电荷转移的4％至3S％ -0.80至-0.55 v（vs她）。沼气的引入没有显着改变生物病态古群落（由Methanobacter sp主导。这种细菌型），但细菌群体从菌斑和促进噬菌体转移，这可能导致沼气喂养系统的改善性能。本研究表明，厌氧蒸煮沼是BES BES BES升级的有前途的生物病态原料。

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  • 来源
    《Environmental Science & Technology》 |2020年第14期|8949-8957|共9页
  • 作者

    Christy M. Dykstra; Cheng Cheng; Spyros G. Pavlostathis;

  • 作者单位

    School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta Georgia 30332-0512 United States School of Civil Construction and Environmental Engineering San Diego State University San Diego California 92182-0003 United States;

    School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta Georgia 30332-0512 United States College of Environment and Ecology Chongqing University Chongqing 400045 P. R. China;

    School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta Georgia 30332-0512 United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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