<i>Anaerobic degradation of Softwood lignin through wet explosion pretreatment</i>

2019 ◽  
Author(s):  
Muhammad Usman Khana ◽  
Birgitte Kiaer Ahring
Keyword(s):  
Anaerobic Degradation ◽  
Wet Explosion Pretreatment ◽  
Wet Explosion

scholarly journals Anaerobic Biodegradation of Wheat Straw Lignin: The Influence of Wet Explosion Pretreatment

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5940
Author(s):  
Muhammad Usman Khan ◽  
Birgitte Kiaer Ahring
Keyword(s):  
Anaerobic Digestion ◽  
Wheat Straw ◽  
Anaerobic Degradation ◽  
Lignin Degradation ◽  
Anaerobic Conditions ◽  
Feed Material ◽  
Energy Product ◽  
Wet Explosion Pretreatment ◽  
Methane Potential ◽  
Wet Explosion

Large amounts of lignin residue is expected in the future when biorefineries for producing biofuels and bio-products will increase in numbers. It is, therefore, valuable to find solutions for using this resource for the sustained production of useful bioenergy or bio-products. Anaerobic digestion could potentially be an option for converting the biorefinery lignin into a valuable energy product. However, lignin is recalcitrant to biodegradation under anaerobic conditions unless the structure is modified. Wet oxidation followed by steam explosion (wet explosion) was previously found to make significant changes to the lignin structure allowing for biodegradation under anaerobic conditions. In this study, we examine the effect of wet explosion pretreatment for anaerobic digestion of wheat straw lignin under mesophilic (37 o C) conditions. Besides the biorefinery lignin produced from wheat straw, untreated lignin was further tested as feed material for anaerobic digestion. Our results showed that wet exploded lignin pretreated with 2% NaOH showed the highest lignin degradation (41.8%) as well as the highest methane potential of 157.3±9.9 ml/g VS. The untreated lignin with no pretreatment showed the lowest methane yield of 65.8±4.8 and only 3.5% of the lignin was degraded. Overall, increased severity of the pretreatment was found to enhance anaerobic degradation of lignin.

Wet explosion pretreatment of sugarcane bagasse for enhanced enzymatic hydrolysis

2014 ◽  
Vol 61 ◽  
pp. 104-113 ◽  
Author(s):  
Rajib Biswas ◽  
H. Uellendahl ◽  
B.K. Ahring
Keyword(s):  
Enzymatic Hydrolysis ◽  
Sugarcane Bagasse ◽  
Wet Explosion Pretreatment ◽  
Wet Explosion

scholarly journals Sugar Production from Hybrid Poplar Sawdust: Optimization of Enzymatic Hydrolysis and Wet Explosion Pretreatment

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3396 ◽  
Author(s):  
Rajib Biswas ◽  
Philip J. Teller ◽  
Muhammad U. Khan ◽  
Birgitte K. Ahring
Keyword(s):  
Enzymatic Hydrolysis ◽  
Hybrid Poplar ◽  
Pilot Scale ◽  
Sugar Yield ◽  
Wet Explosion Pretreatment ◽  
Cellulose Digestibility ◽  
Pretreatment Conditions ◽  
Central Composite ◽  
Poplar Sawdust ◽  
Wet Explosion

Wet explosion pretreatment of hybrid poplar sawdust (PSD) for the production of fermentable sugar was carried out in the pilot-scale. The effects of pretreatment conditions, such as temperature (170–190 °C), oxygen dosage (0.5–7.5% of dry matter (DM), w/w), residence time (10–30 min), on cellulose and hemicellulose digestibility after enzymatic hydrolysis were ascertained with a central composite design of the experiment. Further, enzymatic hydrolysis was optimized in terms of temperature, pH, and a mixture of CTec2 and HTec2 enzymes (Novozymes). Predictive modeling showed that cellulose and hemicellulose digestibility of 75.1% and 83.1%, respectively, could be achieved with a pretreatment at 177 °C with 7.5% O2 and a retention time of 30 min. An increased cellulose digestibility of 87.1% ± 0.1 could be achieved by pretreating at 190 °C; however, the hemicellulose yield would be significantly reduced. It was evident that more severe conditions were required for maximal cellulose digestibility than that of hemicellulose digestibility and that an optimal sugar yield demanded a set of conditions, which overall resulted in the maximum sugar yield.

scholarly journals Wet explosion pretreatment of loblolly pine leads to an increase in methoxylation of the lignin

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Diwakar Rana ◽  
Dhrubojyoti D. Laskar ◽  
Keerthi Srinivas ◽  
Birgitte K. Ahring
Keyword(s):  
Loblolly Pine ◽  
Wet Explosion Pretreatment ◽  
Wet Explosion

Anaerobic digestion of biorefinery lignin: Effect of different wet explosion pretreatment conditions

2020 ◽  
Vol 298 ◽  
pp. 122537 ◽  
Author(s):  
Muhammad Usman Khan ◽  
Birgitte Kiaer Ahring
Keyword(s):  
Anaerobic Digestion ◽  
Wet Explosion Pretreatment ◽  
Pretreatment Conditions ◽  
Wet Explosion

Producing high sugar concentrations from loblolly pine using wet explosion pretreatment

2012 ◽  
Vol 121 ◽  
pp. 61-67 ◽  
Author(s):  
Diwakar Rana ◽  
Vandana Rana ◽  
Birgitte K. Ahring
Keyword(s):  
Loblolly Pine ◽  
High Sugar ◽  
Wet Explosion Pretreatment ◽  
Wet Explosion

Making lignin accessible for anaerobic digestion by wet-explosion pretreatment

2015 ◽  
Vol 175 ◽  
pp. 182-188 ◽  
Author(s):  
Birgitte K. Ahring ◽  
Rajib Biswas ◽  
Aftab Ahamed ◽  
Philip J. Teller ◽  
Hinrich Uellendahl
Keyword(s):  
Anaerobic Digestion ◽  
Wet Explosion Pretreatment ◽  
Wet Explosion
Sign in / Sign up

Export Citation Format

Share Document