Effective pretreatment of lignocellulosic co-substrates using barley straw-adapted microbial consortia to enhanced biomethanation by anaerobic digestion.
Effective pretreatment of lignocellulosic co-substrates using barley straw-adapted microbial consortia to enhanced biomethanation by anaerobic digestion.
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DOI：
10.1016/j.biortech.2020.124437
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发表时间：
2020-11
影响因子：
11.4
通讯作者：
M. Raut;J. Pandhal;P. Wright
中科院分区：
文献类型：
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作者：
M. Raut;J. Pandhal;P. Wright
与能源密集型物理化学前处理相比，微生物前处理被认为是与厌氧消化相容和可持续的过程。在这项研究中，大麦秸秆和干草共基质在厌氧消化前用微氧大麦秸秆适应微生物(BSAM)联合体进行预处理。通过16S rRNA基因测序、微生物计数和C/N比等方法研究其消化率的提高情况。沼气处理35天后，L的甲烷产量达到15.2 kg−1TS，几乎是对照的40倍。BSAM和对照产气中甲烷含量分别为58%(v/v)和10%(v/v)。研究表明，基于BSAM的预处理显著提高了木质纤维材料的消化率和表面积，并显著增强了生物甲基化作用。这项研究在新兴的木质纤维厌氧消化-生物精炼领域产生了新的潜在生物研究机会。
Microbial pretreatments have been identified as a compatible and sustainable process with anaerobic digestion compared to energy-intensive physicochemical pretreatments. In this study, barley straw and hay co-substrate was pretreated with a microaerobic barley straw-adapted microbial (BSAM) consortium prior to anaerobic digestion. The improved digestibility was investigated through 16S rRNA gene sequencing, microbial counts and C:N ratios. BSAM pretreatment resulted in 15.2 L kg−1TS of methane yield after 35 days, almost 40 times more than the control. The methane content in total biogas produced were 58% (v/v) and 10% (v/v) in BSAM and control, respectively. This research demonstrated that BSAM-based pretreatment significantly increased the digestibility and surface area of the lignocellulosic material and considerably enhanced biomethanation. This study generates new potential bio-research opportunities in the emerging field of lignocellulosic anaerobic digestion-biorefineries.