Contributo in volume, 2013, ENG

Extremophilic (hemi)cellulolytic microorganisms and enzymes.

B. Cobucci-Ponzano, E. Ionata, F. La Cara, A. Morana, M.C. Ferrara, L. Maurelli, A. Strazzulli, R. Giglio, M. Moracci

CNR

The second generation bioethanol represents a main challenge in global efforts to utilize renewable resources rather than fossil fuels. However, the close association of cellulose and hemicelluloses to lignin in the plant cell wall makes it difficult to degrade lignocellulose into fermentable sugars. Consequently, pretreatments are necessary to make the polysaccharides more accessible to the enzymes, but the high temperature and extreme pH conditions required give rise to problems when using conventional enzymes in the saccharification step (Galbe and Zacchi 2002). Microorganisms thriving in habitats characterized by harsh conditions, and the enzymes derived therein, represent a helpful tool in the development of bioethanol production processes. In fact, they allow bioconversions at nonconventional conditions under which common biocatalysts are denatured. The use of high operational temperatures allows energy savings by reducing the cooling cost after high temperature pretreatments, and, in ethanol production, thermophilic conditions permit ethanol evaporation allowing harvest during fermentation.

Keywords

Thermozymes, thermophilic micro-organisms, cellulose, hemicellulose, lignocellulose

CNR authors

Giglio Rosa, Strazzulli Andrea, Moracci Marco, Maurelli Luisa, Morana Alessandra, Cobucci Ponzano Beatrice, Ionata Elena, La Cara Francesco

CNR institutes

IBBR – Istituto di Bioscienze e Biorisorse, IRET – Istituto di Ricerca sugli Ecosistemi Terrestri

ID: 297408

Year: 2013

Type: Contributo in volume

Creation: 2015-02-05 11:49:00.000

Last update: 2020-10-13 10:48:37.000

External links

OAI-PMH: Dublin Core

OAI-PMH: Mods

OAI-PMH: RDF

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:297408