Assessing the environmental sustainability of ethanol from integrated biorefineries.
Identifieur interne : 002362 ( Main/Exploration ); précédent : 002361; suivant : 002363Assessing the environmental sustainability of ethanol from integrated biorefineries.
Auteurs : Temitope Falano [Royaume-Uni] ; Harish K. Jeswani ; Adisa AzapagicSource :
- Biotechnology journal [ 1860-7314 ] ; 2014.
Descripteurs français
- KwdFr :
- MESH :
- effets indésirables : Pétrole, Éthanol.
- métabolisme : Éthanol.
- Biocarburants, Effet de serre, Environnement, Fermentation.
English descriptors
- KwdEn :
- MESH :
- chemical , adverse effects : Ethanol, Petroleum.
- chemical , metabolism : Ethanol.
- chemical : Biofuels.
- Environment, Fermentation, Greenhouse Effect.
Abstract
This paper considers the life cycle environmental sustainability of ethanol produced in integrated biorefineries together with chemicals and energy. Four types of second-generation feedstocks are considered: wheat straw, forest residue, poplar, and miscanthus. Seven out of 11 environmental impacts from ethanol are negative, including greenhouse gas (GHG) emissions, when the system is credited for the co-products, indicating environmental savings. Ethanol from poplar is the best and straw the worst option for most impacts. Land use change from forest to miscanthus increases the GHG emissions several-fold. For poplar, the effect is opposite: converting grassland to forest reduces the emissions by three-fold. Compared to fossil and first-generation ethanol, ethanol from integrated biorefineries is more sustainable for most impacts, with the exception of wheat straw. Pure ethanol saves up to 87% of GHG emissions compared to petrol per MJ of fuel. However, for the current 5% ethanol-petrol blends, the savings are much smaller (<3%). Therefore, unless much higher blends become widespread, the contribution of ethanol from integrated biorefineries to the reduction of GHG emissions will be insignificant. Yet, higher ethanol blends would lead to an increase in some impacts, notably terrestrial and freshwater toxicity as well as eutrophication for some feedstocks.
DOI: 10.1002/biot.201300246
PubMed: 24478110
PubMed Central: PMC4674963
Affiliations:
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Jeswani</name></author><author><name sortKey="Azapagic, Adisa" sort="Azapagic, Adisa" uniqKey="Azapagic A" first="Adisa" last="Azapagic">Adisa Azapagic</name></author></analytic><series><title level="j">Biotechnology journal</title><idno type="eISSN">1860-7314</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biofuels (MeSH)</term><term>Environment (MeSH)</term><term>Ethanol (adverse effects)</term><term>Ethanol (metabolism)</term><term>Fermentation (MeSH)</term><term>Greenhouse Effect (MeSH)</term><term>Petroleum (adverse effects)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Biocarburants (MeSH)</term><term>Effet de serre (MeSH)</term><term>Environnement (MeSH)</term><term>Fermentation (MeSH)</term><term>Pétrole (effets indésirables)</term><term>Éthanol (effets indésirables)</term><term>Éthanol (métabolisme)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="adverse effects" xml:lang="en"><term>Ethanol</term><term>Petroleum</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Ethanol</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Biofuels</term></keywords><keywords scheme="MESH" qualifier="effets indésirables" xml:lang="fr"><term>Pétrole</term><term>Éthanol</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Éthanol</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Environment</term><term>Fermentation</term><term>Greenhouse Effect</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Biocarburants</term><term>Effet de serre</term><term>Environnement</term><term>Fermentation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This paper considers the life cycle environmental sustainability of ethanol produced in integrated biorefineries together with chemicals and energy. Four types of second-generation feedstocks are considered: wheat straw, forest residue, poplar, and miscanthus. Seven out of 11 environmental impacts from ethanol are negative, including greenhouse gas (GHG) emissions, when the system is credited for the co-products, indicating environmental savings. Ethanol from poplar is the best and straw the worst option for most impacts. Land use change from forest to miscanthus increases the GHG emissions several-fold. For poplar, the effect is opposite: converting grassland to forest reduces the emissions by three-fold. Compared to fossil and first-generation ethanol, ethanol from integrated biorefineries is more sustainable for most impacts, with the exception of wheat straw. Pure ethanol saves up to 87% of GHG emissions compared to petrol per MJ of fuel. However, for the current 5% ethanol-petrol blends, the savings are much smaller (<3%). Therefore, unless much higher blends become widespread, the contribution of ethanol from integrated biorefineries to the reduction of GHG emissions will be insignificant. Yet, higher ethanol blends would lead to an increase in some impacts, notably terrestrial and freshwater toxicity as well as eutrophication for some feedstocks. </div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">24478110</PMID><DateCompleted><Year>2015</Year><Month>08</Month><Day>26</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1860-7314</ISSN><JournalIssue CitedMedium="Internet"><Volume>9</Volume><Issue>6</Issue><PubDate><Year>2014</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Biotechnology journal</Title><ISOAbbreviation>Biotechnol J</ISOAbbreviation></Journal><ArticleTitle>Assessing the environmental sustainability of ethanol from integrated biorefineries.</ArticleTitle><Pagination><MedlinePgn>753-65</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1002/biot.201300246</ELocationID><Abstract><AbstractText>This paper considers the life cycle environmental sustainability of ethanol produced in integrated biorefineries together with chemicals and energy. Four types of second-generation feedstocks are considered: wheat straw, forest residue, poplar, and miscanthus. Seven out of 11 environmental impacts from ethanol are negative, including greenhouse gas (GHG) emissions, when the system is credited for the co-products, indicating environmental savings. Ethanol from poplar is the best and straw the worst option for most impacts. Land use change from forest to miscanthus increases the GHG emissions several-fold. For poplar, the effect is opposite: converting grassland to forest reduces the emissions by three-fold. Compared to fossil and first-generation ethanol, ethanol from integrated biorefineries is more sustainable for most impacts, with the exception of wheat straw. Pure ethanol saves up to 87% of GHG emissions compared to petrol per MJ of fuel. However, for the current 5% ethanol-petrol blends, the savings are much smaller (<3%). Therefore, unless much higher blends become widespread, the contribution of ethanol from integrated biorefineries to the reduction of GHG emissions will be insignificant. Yet, higher ethanol blends would lead to an increase in some impacts, notably terrestrial and freshwater toxicity as well as eutrophication for some feedstocks. </AbstractText><CopyrightInformation>© 2014 The Authors. Biotechnology Journal published by Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. 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Jeswani</name></noCountry><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Falano, Temitope" sort="Falano, Temitope" uniqKey="Falano T" first="Temitope" last="Falano">Temitope Falano</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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