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首页> 外文期刊>RSC Advances >Lignocellulosic hydrogen production using dark fermentation by Clostridium lentocellum strain Cel10 newly isolated from Ailuropoda melanoleuca excrement
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Lignocellulosic hydrogen production using dark fermentation by Clostridium lentocellum strain Cel10 newly isolated from Ailuropoda melanoleuca excrement

机译：木质纤维素氢生产用梭菌菌株菌株菌株Cel10新分离的黑暗发酵从云洛莫莫洛索（Melanoleuca粪便）新分离

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摘要

Due to the characteristics of renewable and carbon-neutral, lignocellulose is considered to be one of the most potential, feasible, and ample resources for biofuel production on the Earth. However, the low energy conversion capacity of microorganisms is the primary bottleneck for utilizing lignocellulosic biomass to produce biofuel. In the present study, a mesophilic bacterial strain Cel10 identified as Clostridium lentocellum, according to 16S rRNA sequence homology, which can produce hydrogen from lignocellulose was isolated and characterized. The optimal conditions of hydrogen production from carboxymethylcellulose (CMC) are 37 degrees C, pH 7.0, and 5.0 g L-1. The H-2 production peaked at 5.419 mmol H-2 g(-1) CMC under these conditions, which is relatively high compared to the other reported mesophilic bacteria that use cellulose as a substrate. Moreover, the H-2-producing performance of strain Cel10 using cassava residues, a type of natural lignocellulosic feedstock, was also investigated. The results show that the hydrogen production peaked at 4.08 mmol H-2 g(-1) after 72 h of incubation, which is almost 1.2-3.8 times higher than the production of other mesophilic and thermophilic strains, while the highest cassava residues degradation rate reached 45.43%. The results validate that Clostridium lentocellum strain Cel10, newly isolated from Ailuropoda melanoleuca excrement, can offer a new method for directly converting lignocellulosic biomass to bio-hydrogen.
机译：由于可再生和碳中性的特点，木质纤维素被认为是地球上生物燃料生产的最潜在，可行和充足的资源之一。然而，微生物的低能量转换能力是利用木质纤维素生物质产生生物燃料的主要瓶颈。在本研究中，根据16S rRNA序列同源性鉴定为甜菜核节蛋白酶的嗜培素细菌菌株CEL10，其可以分离来自木质纤维素的氢纤维素。羧甲基纤维素（CMC）的氢气产生的最佳条件为37℃，pH7.0和5.0g L-1。在这些条件下，H-2生产在5.419mmolH-2g（-1）CMC下达到5.419mmol H-2g（-1）CMC，其与使用纤维素作为基材的其他嗜苯胺菌相比相对较高。此外，还研究了使用木薯残留物，一种天然木质纤维素原料的菌株Cel10的H-2产生性能。结果表明，在孵育72小时后，氢气产生达到4.08mmol H-2g（-1），其比其他嗜热和嗜热菌株的产生高近1.2-3.8倍，而最高的木薯残留物降解速率达到45.43％。结果验证了新分离的梭菌叶绿群菌株Cel10，从云罗莫罗脲堤排泄物，可以提供一种用于直接将木质纤维素生物质转化为生物氢的新方法。

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  • 来源
    《RSC Advances》 |2019年第20期|共7页
  • 作者

    Zhang Luyan; Li Yan; Liu Xianshu; Ren Nanqi; Ding Jie;

  • 作者单位

    Harbin Inst Technol State Key Lab Urban Water Resource &

    Environm Sch Environm Harbin 150090 Heilongjiang Peoples R China;

    Harbin Inst Technol State Key Lab Urban Water Resource &

    Environm Sch Environm Harbin 150090 Heilongjiang Peoples R China;

    Harbin Inst Technol State Key Lab Urban Water Resource &

    Environm Sch Environm Harbin 150090 Heilongjiang Peoples R China;

    Harbin Inst Technol State Key Lab Urban Water Resource &

    Environm Sch Environm Harbin 150090 Heilongjiang Peoples R China;

    Harbin Inst Technol State Key Lab Urban Water Resource &

    Environm Sch Environm Harbin 150090 Heilongjiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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