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Integrating microbial electrochemical technologies with anaerobic digestion to accelerate propionate degradation

机译：用厌氧消化整合微生物电化学技术，加速丙酸脱硫

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摘要

The aim of this study is to evaluate the integration of microbial electrochemical technologies (MET) with anaerobic digestion (AD) to overcome AD limitations caused by propionate accumulation. The study focuses on understanding to what extent the inoculum impacts on the behaviour of the integrated systems (AD-MET) from the perspective of propionate degradation, methane production and microbial population dynamics. Three different inocula were used: two from environmental sources (anaerobic sludge and river sediment) and another one from a pre-enriched electroactive consortium adapted to propionate degradation. Contrary to expectations, the reactor inoculated with the pre-enriched consortium was not able to maintain its initial good performance in the long run, and the bioelectrochemical activity collapsed after three months of operation. On the other hand, the reactor inoculated with anaerobic sludge, although it required a relatively longer time to produce any observable current, was able to maintain an electrogenic activity operation (0.8 A m(-2)), whilst showcasing the positive contribution of AD-MET integration into tackling propionate accumulation and enhancing methane yield (338 mL gCOD(-1)). However, it must also be highlighted that from a purely energetic point of view the ADMET was not favourable.
机译：本研究的目的是评估微生物电化学技术（MET）与厌氧消化（AD）的集成，以克服由丙酸盐积累引起的广告限制。该研究侧重于理解接种程度，从丙酸盐降解，甲烷产量和微生物种群动态的角度来看inoculum对综合系统的行为（ad-met）的影响。使用了三种不同的海绵：来自环境来源（厌氧污泥和河流沉积物）的两种，另一个来自预富集的电活性联盟，适应丙酸盐降解。与期望相反，接种与预先富集的联盟的反应器无法长期保持其初始良好性能，并且在操作三个月后的生物电化学活性塌陷。另一方面，用厌氧污泥接种的反应器，尽管它需要相对较长的时间来产生任何可观察电流，但能够保持电活性操作（0.8米（-2）），同时展示广告的积极贡献 - 用于处理丙酸盐积聚并增强甲烷产率（338mL GCOD（-1））中的融合。但是，它也必须强调，从纯粹的精力充沛的角度来看，呼叫者是不利的。

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  • 来源
    《Fuel》 |2020年第may1期|117158.1-117158.9|共9页
  • 作者

    Alonso Raul M.; Escapa Adrian; Sotres Ana; Moran Antonio;

  • 作者单位

    Univ Leon Nat Resources Inst IRENA Chem & Environm Bioproc Engn Grp Av Portugal 41 Leon 24009 Spain;

    Univ Leon Nat Resources Inst IRENA Chem & Environm Bioproc Engn Grp Av Portugal 41 Leon 24009 Spain|Univ Leon Dept Elect Engn & Automat Syst Campus Vegazana S-N E-24071 Leon Spain;

    Univ Leon Nat Resources Inst IRENA Chem & Environm Bioproc Engn Grp Av Portugal 41 Leon 24009 Spain;

    Univ Leon Nat Resources Inst IRENA Chem & Environm Bioproc Engn Grp Av Portugal 41 Leon 24009 Spain;

  • 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

    Anaerobic digestion; Microbial electrochemical technologies; Propionate; Biogas;

    机译：厌氧消化;微生物电化学技术;丙酸盐;沼气;

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