Energy Citations Database

Bibliographic Citation

 
Document
For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field.
For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability.
Title Effect of chemical treatments on the degradability of cotton straw by rumen microorganisms and by fungal cellulase
Creator/Author Miron, J. ; Ben-Ghedalia, D.
Publication Date1981 Dec 01
OSTI IdentifierOSTI ID: 5095073
Other Number(s)CODEN: BIBIA
Resource TypeJournal Article
Resource RelationBiotechnol. Bioeng. ; Vol/Issue: 23:12
Research OrgAgric. Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Subject140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989) ;550700 -- Microbiology; ;COTTON-- ALKALINE HYDROLYSIS;COTTON-- ENZYMATIC HYDROLYSIS;COTTON-- OXIDATION;STRAW-- ALKALINE HYDROLYSIS;STRAW-- ENZYMATIC HYDROLYSIS;STRAW-- OXIDATION; BIODEGRADATION;CELLULASE;CELLULOSE;HEMICELLULOSE;IN VITRO;LIGNIN;OZONE;RUMINANTS;SACCHARIFICATION;SODIUM HYDROXIDES;STOMACH;SULFUR DIOXIDE;TRICHODERMA VIRIDE
Related SubjectALKALI METAL COMPOUNDS;ANIMALS;BODY;CARBOHYDRATES;CHALCOGENIDES;CHEMICAL REACTIONS;DECOMPOSITION;DIGESTIVE SYSTEM;ENZYMES;FUNGI;GASTROINTESTINAL TRACT;GLYCOSYL HYDROLASES;HYDROGEN COMPOUNDS;HYDROLASES;HYDROLYSIS;HYDROXIDES;LYSIS;MAMMALS;O-GLYCOSYL HYDROLASES;ORGANIC COMPOUNDS;ORGANS;OXIDES;OXYGEN COMPOUNDS;PLANTS;POLYSACCHARIDES;SACCHARIDES;SODIUM COMPOUNDS;SOLVOLYSIS;SULFUR COMPOUNDS;SULFUR OXIDES;TRICHODERMA;VERTEBRATES
Description/Abstract Three different chemical treatments-sulfur dioxide, ozone, and sodium hydroxide-were applied on cotton straw, and the effect on cell-wall degradability was assessed by using rumen microorganisms and Trichoderma reesei cellulase.^Sulfur dioxide (applied at 70 degrees Celcius for 72 hours) did not change the lignin content of cotton straw but reduced the concentration of hemicellulose by 48%.^Ozone exerted a dual effect, both on lignin (a 40% reduction) and hemicellulose (a 54% decrease).^The treatment with NaOH did not solubilize cell-wall components.^The in vitro organic matter digestibility with rumen fluid of cotton straw was increased significantly by ozone and SO/sub 2/ treatments, by 120% and 50%, respectively, but not by NaOH.^T. reesei cellulase was applied on the chemically pretreated cotton straw at a low level (6 filter paper U/g straw, organic matter).^The highest level of reducing sugars (30.6 g/100 g organic matter) was obtained with the O/sub 3/-cellulase combination, which solubilized 64% of the cellulose and 88% of the hemicellulose.^The SO/sub 2/- and the NaOH-pretreated cotton straw were hydrolyzed by T. reesei cellulase to the same extent.^The rumen fluid digestibility of the enzymatically hydrolyzed straw was not increased over that obtained with the chemical pretreatments.^However, the fermentability of the combined treatments was increased markedly.^In the O/sub 3/-cellulase-treated cotton straw, 83% of the rumen fluid digestible material consisted of highly fermentable components.^Although ozone proved to be the most potent pretreatment for enzymic saccharification, the absolute result was modest.^The limited effect of the combined O/sub 3/-cellulase treatment was probably associated with the pretreatment limitations, but not with the enzyme level.^A hypothesis has been suggested as to the location of lignin and hemicellulose in the cell-wall unit of cotton straw.^(Refs.^18).
Country of PublicationUnited States
LanguageEnglish
FormatPages: 2863-2873
System Entry Date2001 May 13

Top