Dairy manure acidogenic fermentation at hyperthermophilic temperature enabled superior activity of thermostable hydrolytic enzymes linked to the genus Caldicoprobacter
Journal Article
·
· Bioresource Technology
- Washington State Univ., Pullman, WA (United States)
- Washington State Univ., Pullman, WA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Process Engineering. Key Lab. of Multiphase Complex Systems
In this study, fermentation experiments were conducted under mesophilic, thermophilic, and hyperthermophilic conditions to investigate adaptation of microbial communities and its effect on extracellular enzyme activities toward degradation of cellulose, hemicellulose and proteins in dairy manure. Here, hyperthermophilic conditions transformed the microbiome structure and stimulated activity of extracellular proteolytic, cellulolytic, and hemicellulolytic enzymes. Specifically, the activities of protease, cellulose 1,4-β-cellobiosidase, and β-glucosidase secreted by hyperthermophilic microbes were higher by 22%, 47% and 49% compared to those produced by mesophilic and thermophilic communities. Enhanced hydrolytic activity of hyperthermophilic microbes enabled improved feedstock solubilization and production of 39% and 22% more soluble COD than mesophilic and thermophilic microbes, respectively. Connections between hydrolytic function and microbial community structure at various temperatures were assessed using the PICRUSt2 computational tool. Genus Caldicoprobacter was identified as the primary candidate responsible for increased production of thermostable endo-1,4-β-glucanase, β-glucosidase and endo-1,4-β-xylanase, and enhanced hydrolytic performance of hyperthermophilic microbial community.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Washington State University, Pullman, WA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Bioenergy Technologies Office (BETO)
- Grant/Contract Number:
- AC05-76RL01830; EE0008808
- OSTI ID:
- 2278126
- Alternate ID(s):
- OSTI ID: 2478850
OSTI ID: 2205526
- Report Number(s):
- PNNL-SA--178176
- Journal Information:
- Bioresource Technology, Journal Name: Bioresource Technology Journal Issue: Part B Vol. 391; ISSN 0960-8524
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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· Appl. Environ. Microbiol.; (United States)
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OSTI ID:5083108
Related Subjects
09 BIOMASS FUELS
59 BASIC BIOLOGICAL SCIENCES
Thermostable hydrolases
Cellulolytic activity
Hemicellulolytic activity
Proteolytic activity
Evolving enhanced hydrolytic activity
cellulolytic activity
evolving enhanced hydrolytic activity
hemicellulolytic activity
proteolytic activity
thermostable hydrolases
59 BASIC BIOLOGICAL SCIENCES
Thermostable hydrolases
Cellulolytic activity
Hemicellulolytic activity
Proteolytic activity
Evolving enhanced hydrolytic activity
cellulolytic activity
evolving enhanced hydrolytic activity
hemicellulolytic activity
proteolytic activity
thermostable hydrolases