Pretreatment of hybrid poplar by aqueous ammonia.
Identifieur interne : 003407 ( Main/Exploration ); précédent : 003406; suivant : 003408Pretreatment of hybrid poplar by aqueous ammonia.
Auteurs : Rajesh Gupta [États-Unis] ; Y Y LeeSource :
- Biotechnology progress [ 1520-6033 ]
Descripteurs français
- KwdFr :
- Ammoniac (composition chimique), Biotechnologie (méthodes), Cellulase (composition chimique), Fermentation (MeSH), Hydrolyse (MeSH), Lignine (composition chimique), Lignine (métabolisme), Oxydoréduction (MeSH), Peroxyde d'hydrogène (composition chimique), Populus (composition chimique), Populus (métabolisme), Ressources de production d'énergie (MeSH), Saccharomyces cerevisiae (métabolisme).
- MESH :
- composition chimique : Ammoniac, Cellulase, Lignine, Peroxyde d'hydrogène, Populus.
- métabolisme : Lignine, Populus, Saccharomyces cerevisiae.
- méthodes : Biotechnologie.
- Fermentation, Hydrolyse, Oxydoréduction, Ressources de production d'énergie.
English descriptors
- KwdEn :
- Ammonia (chemistry), Biotechnology (methods), Cellulase (chemistry), Energy-Generating Resources (MeSH), Fermentation (MeSH), Hydrogen Peroxide (chemistry), Hydrolysis (MeSH), Lignin (chemistry), Lignin (metabolism), Oxidation-Reduction (MeSH), Populus (chemistry), Populus (metabolism), Saccharomyces cerevisiae (metabolism).
- MESH :
- chemical , chemistry : Ammonia, Cellulase, Hydrogen Peroxide, Lignin.
- chemical , metabolism : Lignin.
- chemistry : Populus.
- metabolism : Populus, Saccharomyces cerevisiae.
- methods : Biotechnology.
- Energy-Generating Resources, Fermentation, Hydrolysis, Oxidation-Reduction.
Abstract
Enzymatic hydrolysis of hybrid poplar treated by ammonia recycle percolation (ARP) was studied applying cellulase enzyme supplemented with additional xylanase or pectinase. The effect of xylanase addition was much more significant than pectinase addition. Conversion of ARP-treated hybrid poplar to ethanol was carried out by simultaneous saccharification and fermentation (SSF) and SS and cofermentation (SSCF). The maximum ethanol yield observed from the SSCF experiment was 78% of theoretical maximum based on the total carbohydrate (glucan + xylan). The same feedstock was also treated by soaking in aqueous ammonia (SAA), a batch pretreatment process with lower severity than ARP. The test results indicated that relatively high severity is required to attain acceptable level of digestibility of hybrid poplar. In order to lower the severity of the pretreatment, addition of H(2)O(2) was attempted in the SAA. Addition of H(2)O(2) significantly enhanced delignification of hybrid poplar due to its oxidative degradation of lignin. Several different H(2)O(2) feeding schemes and different temperature profiles were attempted in operation of the SAA to investigate the effects of H(2)O(2) on degradation of lignin and carbohydrates in hybrid poplar. More than 60% of lignin in hybrid poplar was removed with stepwise-increase of temperature (60-120 degrees C after 4h of reaction). Increase of carbohydrate degradation was also observed under this condition.
DOI: 10.1002/btpr.133
PubMed: 19322817
Affiliations:
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The effect of xylanase addition was much more significant than pectinase addition. Conversion of ARP-treated hybrid poplar to ethanol was carried out by simultaneous saccharification and fermentation (SSF) and SS and cofermentation (SSCF). The maximum ethanol yield observed from the SSCF experiment was 78% of theoretical maximum based on the total carbohydrate (glucan + xylan). The same feedstock was also treated by soaking in aqueous ammonia (SAA), a batch pretreatment process with lower severity than ARP. The test results indicated that relatively high severity is required to attain acceptable level of digestibility of hybrid poplar. In order to lower the severity of the pretreatment, addition of H(2)O(2) was attempted in the SAA. Addition of H(2)O(2) significantly enhanced delignification of hybrid poplar due to its oxidative degradation of lignin. Several different H(2)O(2) feeding schemes and different temperature profiles were attempted in operation of the SAA to investigate the effects of H(2)O(2) on degradation of lignin and carbohydrates in hybrid poplar. More than 60% of lignin in hybrid poplar was removed with stepwise-increase of temperature (60-120 degrees C after 4h of reaction). Increase of carbohydrate degradation was also observed under this condition.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">19322817</PMID><DateCompleted><Year>2009</Year><Month>06</Month><Day>03</Day></DateCompleted><DateRevised><Year>2019</Year><Month>12</Month><Day>10</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1520-6033</ISSN><JournalIssue CitedMedium="Internet"><Volume>25</Volume><Issue>2</Issue><PubDate><MedlineDate>2009 Mar-Apr</MedlineDate></PubDate></JournalIssue><Title>Biotechnology progress</Title><ISOAbbreviation>Biotechnol Prog</ISOAbbreviation></Journal><ArticleTitle>Pretreatment of hybrid poplar by aqueous ammonia.</ArticleTitle><Pagination><MedlinePgn>357-64</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1002/btpr.133</ELocationID><Abstract><AbstractText>Enzymatic hydrolysis of hybrid poplar treated by ammonia recycle percolation (ARP) was studied applying cellulase enzyme supplemented with additional xylanase or pectinase. The effect of xylanase addition was much more significant than pectinase addition. Conversion of ARP-treated hybrid poplar to ethanol was carried out by simultaneous saccharification and fermentation (SSF) and SS and cofermentation (SSCF). The maximum ethanol yield observed from the SSCF experiment was 78% of theoretical maximum based on the total carbohydrate (glucan + xylan). The same feedstock was also treated by soaking in aqueous ammonia (SAA), a batch pretreatment process with lower severity than ARP. The test results indicated that relatively high severity is required to attain acceptable level of digestibility of hybrid poplar. In order to lower the severity of the pretreatment, addition of H(2)O(2) was attempted in the SAA. Addition of H(2)O(2) significantly enhanced delignification of hybrid poplar due to its oxidative degradation of lignin. Several different H(2)O(2) feeding schemes and different temperature profiles were attempted in operation of the SAA to investigate the effects of H(2)O(2) on degradation of lignin and carbohydrates in hybrid poplar. More than 60% of lignin in hybrid poplar was removed with stepwise-increase of temperature (60-120 degrees C after 4h of reaction). Increase of carbohydrate degradation was also observed under this condition.</AbstractText><CopyrightInformation>(c) 2009 American Institute of Chemical Engineers Biotechnol.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Gupta</LastName><ForeName>Rajesh</ForeName><Initials>R</Initials><AffiliationInfo><Affiliation>Dept. of Chemical Engineering, Auburn University, AL 36849, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lee</LastName><ForeName>Y Y</ForeName><Initials>YY</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D023362">Evaluation Study</PublicationType><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Biotechnol Prog</MedlineTA><NlmUniqueID>8506292</NlmUniqueID><ISSNLinking>1520-6033</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>7664-41-7</RegistryNumber><NameOfSubstance UI="D000641">Ammonia</NameOfSubstance></Chemical><Chemical><RegistryNumber>9005-53-2</RegistryNumber><NameOfSubstance UI="D008031">Lignin</NameOfSubstance></Chemical><Chemical><RegistryNumber>BBX060AN9V</RegistryNumber><NameOfSubstance UI="D006861">Hydrogen Peroxide</NameOfSubstance></Chemical><Chemical><RegistryNumber>EC 3.2.1.4</RegistryNumber><NameOfSubstance UI="D002480">Cellulase</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000641" MajorTopicYN="N">Ammonia</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D001709" MajorTopicYN="N">Biotechnology</DescriptorName><QualifierName UI="Q000379" MajorTopicYN="Y">methods</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002480" MajorTopicYN="N">Cellulase</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D004736" MajorTopicYN="N">Energy-Generating Resources</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005285" MajorTopicYN="N">Fermentation</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006861" MajorTopicYN="N">Hydrogen Peroxide</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006868" MajorTopicYN="N">Hydrolysis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008031" MajorTopicYN="N">Lignin</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010084" MajorTopicYN="N">Oxidation-Reduction</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012441" MajorTopicYN="N">Saccharomyces cerevisiae</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2009</Year><Month>3</Month><Day>27</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2009</Year><Month>3</Month><Day>27</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2009</Year><Month>6</Month><Day>6</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">19322817</ArticleId><ArticleId IdType="doi">10.1002/btpr.133</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Alabama</li></region></list><tree><noCountry><name sortKey="Lee, Y Y" sort="Lee, Y Y" uniqKey="Lee Y" first="Y Y" last="Lee">Y Y Lee</name></noCountry><country name="États-Unis"><region name="Alabama"><name sortKey="Gupta, Rajesh" sort="Gupta, Rajesh" uniqKey="Gupta R" first="Rajesh" last="Gupta">Rajesh Gupta</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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