Impacts of Cellulase and Amylase on Enzymatic Hydrolysis and Methane Production in the Anaerobic Digestion of Corn Straw

The impacts of enzyme pre-treatments on anaerobic digestion of lignocellulosic biomass were explored by using corn straw as a substrate for enzyme pre-treatment and anaerobic digestion and by utilizing starch and microcrystalline cellulose as substrates for comparative analysis. The cellulase pre-tr...

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Published inSustainability Vol. 12; no. 13; p. 5453
Main Authors Wang, Xuemei, Cheng, Shikun, Li, Zifu, Men, Yu, Wu, Jiajun
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 06.07.2020
Subjects
Agricultural production
Alternative energy sources
Amylases
Anaerobic digestion
Anaerobic treatment
Biogas
Biomass
Cellulase
Cellulose
Comparative analysis
Corn
Corn straw
Crop yield
Crystalline cellulose
Efficiency
Enzymes
Hydrolysis
Lignin
Lignocellulose
Methane
Methods
Particle size
Pretreatment
Refuse as fuel
Starch
Straw
Substrates
Germany
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Abstract The impacts of enzyme pre-treatments on anaerobic digestion of lignocellulosic biomass were explored by using corn straw as a substrate for enzyme pre-treatment and anaerobic digestion and by utilizing starch and microcrystalline cellulose as substrates for comparative analysis. The cellulase pre-treatment effectively improved the enzymatic hydrolysis of cellulose, decreased the crystallinity, and consequently showed 33.2% increase in methane yield. The methane yield of starch increased by 16.0% through amylase pre-treatment. However, when the substrate was corn straw, both the efficiencies of enzymes and methane production were markedly reduced by the lignocellulosic structure. The corn straw’s methane yields were 277.6 and 242.4 mL·CH4/g·VS with cellulase and amylase pre-treatment, respectively, which was 11.7% and 27.9% higher than that of the untreated corn straw. It may imply that the lignocellulose should be broken up firstly, enzyme pre-treatments could have great potentials when combined with other methods.
AbstractList The impacts of enzyme pre-treatments on anaerobic digestion of lignocellulosic biomass were explored by using corn straw as a substrate for enzyme pre-treatment and anaerobic digestion and by utilizing starch and microcrystalline cellulose as substrates for comparative analysis. The cellulase pre-treatment effectively improved the enzymatic hydrolysis of cellulose, decreased the crystallinity, and consequently showed 33.2% increase in methane yield. The methane yield of starch increased by 16.0% through amylase pre-treatment. However, when the substrate was corn straw, both the efficiencies of enzymes and methane production were markedly reduced by the lignocellulosic structure. The corn straw’s methane yields were 277.6 and 242.4 mL·CH4/g·VS with cellulase and amylase pre-treatment, respectively, which was 11.7% and 27.9% higher than that of the untreated corn straw. It may imply that the lignocellulose should be broken up firstly, enzyme pre-treatments could have great potentials when combined with other methods.
Author Wu, Jiajun
Cheng, Shikun
Wang, Xuemei
Li, Zifu
Men, Yu
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  article-title: Optimization of microwave and NaOH pretreatments of wheat straw for enhancing biofuel yield
  publication-title: Energy Convers. Manag.
  doi: 10.1016/j.enconman.2019.02.049
  contributor:
    fullname: Tsegaye
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Snippet The impacts of enzyme pre-treatments on anaerobic digestion of lignocellulosic biomass were explored by using corn straw as a substrate for enzyme...
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SubjectTerms Agricultural production
Alternative energy sources
Amylases
Anaerobic digestion
Anaerobic treatment
Biogas
Biomass
Cellulase
Cellulose
Comparative analysis
Corn
Corn straw
Crop yield
Crystalline cellulose
Efficiency
Enzymes
Hydrolysis
Lignin
Lignocellulose
Methane
Methods
Particle size
Pretreatment
Refuse as fuel
Starch
Straw
Substrates
Title Impacts of Cellulase and Amylase on Enzymatic Hydrolysis and Methane Production in the Anaerobic Digestion of Corn Straw
URI https://www.proquest.com/docview/2422328395/abstract/
Volume 12
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