Effect of Cellulase-producing Microbial Consortium on Biogas Production from Lignocellulosic Biomass

The effect of liquid hot water (LHW) pretreatment with or without acid addition (A-LHW) on the production of hydrogen—through dark fermentation (DF)—and methane—through anaerobic digestion (AD)—using three different lignocellulosic biomass types (sunflower straw (SS), grass lawn (GL), and poplar sawdust (PS)) was investigated. Both pretreatment methods led to hemicellulose degradation, but A-LHW resulted in the release of more potential inhibitors (furans and acids) than the LHW pretreatment. Biological hydrogen production (BHP) of the cellulose-rich solid fractions obtained after LHW and A-LHW pretreatment was enhanced compared to the untreated substrates. Due to the release of inhibitory compounds, LHW pretreatment led to higher biochemical methane potential (BMP) than A-LHW pretreatment when both separated fractions (liquid and solid) obtained after pretreatments were used for AD. The recovered energy in the form of methane with LHW pretreatment was 8.4, 12.5, and 7.5 MJ/kg total solids (TS) for SS, GL, and PS, respectively.

Download Full-text

A simplified model to simulate bioaugmented anaerobic digestion of lignocellulosic biomass: Biogas production efficiency related to microbiological data

The Science of The Total Environment ◽

10.1016/j.scitotenv.2019.07.051 ◽

2019 ◽

Vol 691 ◽

pp. 885-895 ◽

Cited By ~ 9

Author(s):

Alberto Ferraro ◽

Giulia Massini ◽

Valentina Mazzurco Miritana ◽

Antonella Signorini ◽

Marco Race ◽

...

Keyword(s):

Anaerobic Digestion ◽

Lignocellulosic Biomass ◽

Production Efficiency ◽

Biogas Production ◽

Simplified Model ◽

Microbiological Data

Download Full-text

Biological treatment of lignocellulosic biomass by Curvularia lunata for biogas production

Bioresource Technology ◽

10.1016/j.biortech.2020.123151 ◽

2020 ◽

Vol 306 ◽

pp. 123151 ◽

Cited By ~ 3

Author(s):

Monika Yadav ◽

Vivekanand Vivekanand

Keyword(s):

Lignocellulosic Biomass ◽

Biological Treatment ◽

Biogas Production ◽

Curvularia Lunata

Download Full-text

Evaluation on the Methane Production Potential of Wood Waste Pretreated with NaOH and Co-Digested with Pig Manure

Catalysts ◽

10.3390/catal9060539 ◽

2019 ◽

Vol 9 (6) ◽

pp. 539 ◽

Cited By ~ 10

Author(s):

Renfei Li ◽

Wenbing Tan ◽

Xinyu Zhao ◽

Qiuling Dang ◽

Qidao Song ◽

...

Keyword(s):

Anaerobic Digestion ◽

Lignocellulosic Biomass ◽

Methane Production ◽

Biogas Production ◽

Untreated Wood ◽

Wood Waste ◽

Methane Yield ◽

Pig Manure ◽

Naoh Pretreatment ◽

Digestion Technique

Wood waste generated during the tree felling and processing is a rich, green, and renewable lignocellulosic biomass. However, an effective method to apply wood waste in anaerobic digestion is lacking. The high carbon to nitrogen (C/N) ratio and rich lignin content of wood waste are the major limiting factors for high biogas production. NaOH pre-treatment for lignocellulosic biomass is a promising approach to weaken the adverse effect of complex crystalline cellulosic structure on biogas production in anaerobic digestion, and the synergistic integration of lignocellulosic biomass with low C/N ratio biomass in anaerobic digestion is a logical option to balance the excessive C/N ratio. Here, we assessed the improvement of methane production of wood waste in anaerobic digestion by NaOH pretreatment, co-digestion technique, and their combination. The results showed that the methane yield of the single digestion of wood waste was increased by 38.5% after NaOH pretreatment compared with the untreated wood waste. The methane production of the co-digestion of wood waste and pig manure was higher than that of the single digestion of wood waste and had nonsignificant difference with the single-digestion of pig manure. The methane yield of the co-digestion of wood waste pretreated with NaOH and pig manure was increased by 75.8% than that of the untreated wood waste. The findings indicated that wood waste as a sustainable biomass source has considerable potential to achieve high biogas production in anaerobic digestion.

Download Full-text