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Optimizing Harvest of Corn Stover Fractions Based on Overall Sugar Yields following AFEX Pretreatment and Enzymatic Hydrolysis

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TypeOfResource
Text
TitleInfo
Title
Optimizing Harvest of Corn Stover Fractions Based on Overall Sugar Yields following AFEX Pretreatment and Enzymatic Hydrolysis
Name (authority = RutgersOrg-Department); (type = corporate)
NamePart
Chemical & Biochemical Engineering
Name (authority = RutgersOrg-School); (type = corporate)
NamePart
School of Engineering
Genre (authority = RULIB-FS)
Article, Refereed
Genre (authority = NISO JAV)
Accepted Manuscript (AM)
OriginInfo
DateIssued (encoding = w3cdtf); (keyDate = yes)
2009
PhysicalDescription
InternetMediaType
application/pdf
Extent
45 p.
Extension
DescriptiveEvent
Type
Citation
DateTime (encoding = w3cdtf)
2009
AssociatedObject
Type
Journal
Relationship
Has part
Name
Biotechnology for Biofuels
Identifier (type = volume and issue)
2(1)
Reference (type = url)
http://dx.doi.org/10.1186/1754-6834-2-29
Detail
Article number 29
Language
LanguageTerm (authority = ISO 639-3:2007); (type = text)
English
Subject (authority = local)
Topic
Bioethanol production
Subject (authority = local)
Topic
Ethanol production
Subject (authority = local)
Topic
Glucose production
Subject (authority = local)
Topic
Nutritive value
Subject (authority = local)
Topic
Grain maturity
Subject (authority = local)
Topic
Crop residues
Subject (authority = local)
Topic
Corn stover
Subject (authority = local)
Topic
Removal
Subject (authority = local)
Topic
AFEX
Abstract (type = abstract)
Background: Corn stover composition changes considerably throughout the growing season and also varies between the various fractions of the plant. These differences can impact optimal pretreatment conditions, enzymatic digestibility and maximum achievable sugar yields in the process of converting lignocellulosics to ethanol. The goal of this project was to determine which combination of corn stover fractions provides the most benefit to the biorefinery in terms of sugar yields and to determine the preferential order in which fractions should be harvested. Ammonia fiber expansion (AFEX) pretreatment, followed by enzymatic hydrolysis, was performed on early and late harvest corn stover fractions (stem, leaf, husk and cob). Sugar yields were used to optimize scenarios for the selective harvest of corn stover assuming 70% or 30% collection of the total available stover.

Results: The optimal AFEX conditions for all stover fractions, regardless of harvest period, were: 1.5 (g NH(3) g(-1) biomass); 60% moisture content (dry-weight basis; dwb), 90 degrees C and 5 min residence time. Enzymatic hydrolysis was conducted using cellulase, beta-glucosidase, and xylanase at 31.3, 41.3, and 3.1 mg g(-1) glucan, respectively. The optimal harvest order for selectively harvested corn stover (SHCS) was husk > leaf > stem > cob. This harvest scenario, combined with optimal AFEX pretreatment conditions, gave a theoretical ethanol yield of 2051 L ha(-1) and 912 L ha(-1) for 70% and 30% corn stover collection, respectively.

Conclusion: Changing the proportion of stover fractions collected had a smaller impact on theoretical ethanol yields (29 - 141 L ha(-1)) compared to the effect of altering pretreatment and enzymatic hydrolysis conditions (150 - 462 L ha(-1)) or harvesting less stover (852 - 1139 L ha(-1)). Resources may be more effectively spent on improving sustainable harvesting, thereby increasing potential ethanol yields per hectare harvested, and optimizing biomass processing rather than focusing on the selective harvest of specific corn stover fractions.
Note (type = peerReview)
Peer reviewed.
Name (type = personal)
NamePart (type = family)
Garlock
NamePart (type = given)
Rebecca J.
Affiliation
Michigan State University
Role
RoleTerm (authority = marcrt); (type = text)
author
Name (authority = orcid); (authorityURI = http://id.loc.gov/vocabulary/identifiers/orcid.html); (type = personal); (valueURI = http://orcid.org/0000-0003-3677-6735)
NamePart (type = family)
Chundawat
NamePart (type = given)
Shishir P. S.
Affiliation
Michigan State University
Role
RoleTerm (authority = marcrt); (type = text)
author
Name (type = personal)
NamePart (type = family)
Balan
NamePart (type = given)
Venkatesh
Affiliation
Michigan State University
Role
RoleTerm (authority = marcrt); (type = text)
author
Name (type = personal)
NamePart (type = family)
Dale
NamePart (type = given)
Bruce E.
Affiliation
Michigan State University
Role
RoleTerm (authority = marcrt); (type = text)
author
RelatedItem (type = host)
TitleInfo
Title
Chundawat, Shishir P. S.
Identifier (type = local)
rucore30218100001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T3NC63GK
Genre (authority = ExL-Esploro)
Accepted Manuscript
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Copyright for scholarly resources published in RUcore is retained by the copyright holder. By virtue of its appearance in this open access medium, you are free to use this resource, with proper attribution, in educational and other non-commercial settings. Other uses, such as reproduction or republication, may require the permission of the copyright holder.
Copyright
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Copyright protected
Availability
Status
Open
Reason
Permission or license
RightsEvent
Type
Permission or license
AssociatedObject
Type
License
Name
Multiple author license v. 1
Detail
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ContentModel
Document
CreatingApplication
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1.6
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2008-11-13T17:19:31
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2016-11-04T12:46:07
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