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首页> 外文期刊>Fuel >Enhanced digestion of bio-pretreated sawdust using a novel bacterial consortium: Microbial community structure and methane-producing pathways
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Enhanced digestion of bio-pretreated sawdust using a novel bacterial consortium: Microbial community structure and methane-producing pathways

机译：使用新型细菌联合体增强生物预处理过的木屑的消化：微生物群落结构和甲烷产生途径

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摘要

Anaerobic digestion is widely considered the most cost effective and sustainable technology for bio-waste to energy valorization. Several substrates show a certain recalcitrance to the process evolution, such as sawdust. To this aim, in this study, sawdust has been subjected to a biological pretreatment by means of a novel bacterial consortium before its biomethanation. This novel lignocellulose-degrading bacterial consortium, isolated from several carpentries, has been constructed to predict the sawdust biological pretreatment efficacy. A five days bacterial pretreatment led to a significant reduction in the sawdust cellulose, hemicelluloses and lignin contents, towards the control, of 35.8, 37.1 and 46.2% respectively. Microbial diversity was analyzed by VIT (R) gene probe. Methanogenesis was carried out through acetoclastic and hydrogenotrophic pathways. For a forty days digestion time, the biological pretreatment enhanced the cumulative biogas and biomethane production respectively of 86.4 and 92.2% compared to the control. With respect to the state of art, the use of this constructed novel consortium pretreatment can significantly increase the biomethane yield, making the digestion more effective and consequently improving the processes economic feasibility. Moreover, this process can be easily integrated in existing biogas plants for making co-digestion processes still more elastic with regard to the available feedstock.
机译：厌氧消化被广泛认为是将生物废物转化为能源的最具成本效益和可持续性的技术。几种基材显示出对工艺发展的某种抵制，例如锯末。为此目的，在本研究中，锯末已在其生物甲烷化之前通过新型细菌聚生体进行了生物预处理。从几个木工分离的这种新的降解木质纤维素的细菌聚生体已被构建以预测木屑生物预处理的功效。经过五天的细菌预处理，锯木屑中纤维素，半纤维素和木质素的含量分别显着降低，分别为35.8％，37.1％和46.2％。通过VIT（R）基因探针分析微生物多样性。产甲烷作用是通过乙酰碎裂和氢营养途径进行的。在40天的消化时间内，生物预处理与对照相比分别提高了86.4％和92.2％的累积沼气和沼气产量。关于现有技术，使用这种构造的新型联合体预处理可以显着提高生物甲烷的产率，使消化更有效，从而提高了工艺的经济可行性。而且，该过程可以容易地整合到现有的沼气厂中，以使共消化过程在可用原料方面更具弹性。

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  • 来源
    《Fuel》 |2019年第15期|115604.1-115604.15|共15页
  • 作者

    Ali Sameh S.; Al-Tohamy Rania; Manni Alessandro; Luz Fabio Codignole; Elsamahy Tamer; Sun Jianzhong;

  • 作者单位

    Jiangsu Univ, Sch Environm & Safety Engn, Biofuels Inst, Xuefu Rd 301, Zhenjiang 212013, Jiangsu, Peoples R China|Tanta Univ, Fac Sci, Bot Dept, Tanta 31527, Egypt;

    Jiangsu Univ, Sch Environm & Safety Engn, Biofuels Inst, Xuefu Rd 301, Zhenjiang 212013, Jiangsu, Peoples R China;

    Univ Roma Tor Vergata, Dept Ind Engn, Rome, Italy;

    Univ Roma Tor Vergata, Dept Ind Engn, Rome, Italy;

    Jiangsu Univ, Sch Environm & Safety Engn, Biofuels Inst, Xuefu Rd 301, Zhenjiang 212013, Jiangsu, Peoples R China;

    Jiangsu Univ, Sch Environm & Safety Engn, Biofuels Inst, Xuefu Rd 301, Zhenjiang 212013, Jiangsu, Peoples R China;

  • 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; Lignocellulose biomass; Microbial consortium; Methanogens; Sawdust; Biological pretreatment;

    机译：厌氧消化;木质纤维素生物量;微生物联盟;甲烷;锯末;生物预处理;

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