Journal
BIORESOURCE TECHNOLOGY
Volume 321, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.124437
Keywords
Barley straw; Natural hay; Microbial consortia pretreatment; Anaerobic digestion; 16s rRNA gene sequencing
Funding
- Biotechnology and Biological Sciences Research Council (BBSRC) [BB/L013800/1]
- EPSRC [EP/S020705/1] Funding Source: UKRI
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This study demonstrated that microbial pretreatment with BSAM significantly improved the digestibility and surface area of lignocellulosic material, enhancing biomethanation process and methane production.
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(-1) TS 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.
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