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首页> 外文期刊>Energy Conversion & Management >Highly efficient anaerobic co-digestion of food waste and horticultural waste using a three-stage thermophilic bioreactor: Performance evaluation, microbial community analysis, and energy balance assessment
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Highly efficient anaerobic co-digestion of food waste and horticultural waste using a three-stage thermophilic bioreactor: Performance evaluation, microbial community analysis, and energy balance assessment

机译：使用三级嗜热生物反应器高效的厌氧共同消化食品废物和园艺废物：性能评估，微生物群落分析和能量平衡评估

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摘要

The thermophilic anaerobic co-digestion of food waste and horticultural waste with a three-stage bioreactor was investigated to produce renewable energy, focusing on performance evaluation, microbial community analysis, and energy balance assessment. The results of this study indicated that the average methane yield (0.42 +/- 0.06 L/gVS) in the bench-scale three-stage thermophilic bioreactor was approximately 45% and 31% higher than that of the one and two-stage bioreactors, respectively. The average volatile solid (VS) reduction achieved in the bench-scale three-stage thermophilic bioreactor was 63.0 +/- 8.2%, which was 61% and 32% higher than that of the one and two-stage bioreactors, respectively. Pyrosequencing analysis of microbial communities in simulated thermophilic three-stage co-digestion experiments showed that bacterial phyla Firmicutes, Thermotogae and Bacteroidetes dominated in all three types of bioreactors. However, significant differences were observed at the genus level of bacterial communities between the one, two and three-stage bioreactors. Indeed, due to selective enrichment, the dominant methanogenic pathways in the three-stage bioreactor shifted from hydrogenotrophic methanogenesis at a low organic loading rate (OLR) to a balance of hydrogenotrophic and acetoclastic pathways at high OLR. Furthermore, assessments of the energy balance and the economic viability of the bench-scale system demonstrated that the three-stage thermophilic co-digestion could be a promising process for the treatment of food waste and horticultural waste as well as for bioenergy recovery at an industrial scale.
机译：研究了嗜热厌氧共同消化食物废物和园艺废物与三阶段生物反应器，以产生可再生能源，重点关注性能评估，微生物群落分析和能量平衡评估。本研究的结果表明，平均甲烷产率（0.42 +/- 0.06L / gV）在平坦的三级嗜热生物反应器中约为45％和31％，高于1和两级生物反应器，分别。在稳压三阶段嗜热生物反应器中实现的平均挥发性固体（Vs）减少为63.0 +/- 8.2％，分别比单阶段和两级生物反应器高出61％和32％。微生物嗜热三阶段共消化实验中微生物群落的焦点分析表明，在所有三种类型的生物反应器中占据了细菌植物的迫切性，Thermotogae和Bacteropetes。然而，在一个，两个和三级生物反应器之间的细菌群体中观察到显着差异。实际上，由于选择性富集，三阶段生物反应器中的显性甲状腺途径从低有机加载速率（OLR）以高oLR的氢营养率（OLR）的平衡转移到高奥尔尔的抗营养性和乙内腔途径的平衡。此外，替补体系的能量平衡和经济可行性的评估表明，三阶段热嗜热共消化可能是治疗食品废物和园艺废物的有希望的过程以及在工业的生物能源恢复规模。

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  • 来源
    《Energy Conversion & Management》 |2020年第11期|113290.1-113290.12|共12页
  • 作者

    Zhang Le; Kuroki Agnes; Loh Kai-Chee; Seok Jiyeux Kim; Dai Yanjun; Tong Yen Wah;

  • 作者单位

    Natl Univ Singapore NUS Environm Res Inst 1 Create Way Create Tower 15-02 Singapore 138602 Singapore;

    Natl Univ Singapore NUS Environm Res Inst 1 Create Way Create Tower 15-02 Singapore 138602 Singapore;

    Natl Univ Singapore NUS Environm Res Inst 1 Create Way Create Tower 15-02 Singapore 138602 Singapore|Natl Univ Singapore Dept Chem & Biomol Engn 4 Engn Dr 4 Singapore 117585 Singapore;

    Univ Penn Dept Chem & Biomol Engn 220 S 33rd St Philadelphia PA 19104 USA;

    Shanghai Jiao Tong Univ Sch Mech Engn Shanghai Peoples R China;

    Natl Univ Singapore NUS Environm Res Inst 1 Create Way Create Tower 15-02 Singapore 138602 Singapore|Natl Univ Singapore Dept Chem & Biomol Engn 4 Engn Dr 4 Singapore 117585 Singapore;

  • 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
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  • 关键词

    Three-stage thermophilic anaerobic digestion; Bioenergy conversion; Waste minimization; Functional segregation; Microbial enrichment; Energy balance analysis;

    机译：三级嗜热厌氧消化;生物能源转换;浪费最小化;功能偏析;微生物富集;能量平衡分析;

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