Abstract
Cellulose fibers can be produced from straw by an organosolve process or similar week acid hydrolysis. The hydrolysate sugars can further be converted to volatile fatty acids by fermentation. The composition of the hydrolysate was analyzed. Xylose was predominant, but in a lower contration than expected from the overall COD-content. This study has shown that if the fermentation is carried out in a fixed film reactor, composition of the acid mixture in the broth yield and conversion speed are strongly dependent on pH and retention time. The production of the more valuable acids, such as lactic acid and butyric acid is favored by a pH around 6,0. Lactid acid should be produced at low retention times of app. 4 hours or less, whereas butyric acid requires retention times of 40 - 60 hours. Attempt to recover the acids by extraction with a solvent compose of tertiary amines and nonylphenol did not prove to be succesful. Other ways of recovering the acids reported in the litterature have been studied and are going to be tested out in the second phase of the project.
Citation Formats
Hamann Spendler, F.
Use of hemicellulose hydrolate in the production of fatty acids. Udnyttelse af hemicellulosehydrolysat til fremstilling af fede syrer.
Denmark: N. p.,
1988.
Web.
Hamann Spendler, F.
Use of hemicellulose hydrolate in the production of fatty acids. Udnyttelse af hemicellulosehydrolysat til fremstilling af fede syrer.
Denmark.
Hamann Spendler, F.
1988.
"Use of hemicellulose hydrolate in the production of fatty acids. Udnyttelse af hemicellulosehydrolysat til fremstilling af fede syrer."
Denmark.
@misc{etde_7782961,
title = {Use of hemicellulose hydrolate in the production of fatty acids. Udnyttelse af hemicellulosehydrolysat til fremstilling af fede syrer}
author = {Hamann Spendler, F.}
abstractNote = {Cellulose fibers can be produced from straw by an organosolve process or similar week acid hydrolysis. The hydrolysate sugars can further be converted to volatile fatty acids by fermentation. The composition of the hydrolysate was analyzed. Xylose was predominant, but in a lower contration than expected from the overall COD-content. This study has shown that if the fermentation is carried out in a fixed film reactor, composition of the acid mixture in the broth yield and conversion speed are strongly dependent on pH and retention time. The production of the more valuable acids, such as lactic acid and butyric acid is favored by a pH around 6,0. Lactid acid should be produced at low retention times of app. 4 hours or less, whereas butyric acid requires retention times of 40 - 60 hours. Attempt to recover the acids by extraction with a solvent compose of tertiary amines and nonylphenol did not prove to be succesful. Other ways of recovering the acids reported in the litterature have been studied and are going to be tested out in the second phase of the project.}
place = {Denmark}
year = {1988}
month = {Jun}
}
title = {Use of hemicellulose hydrolate in the production of fatty acids. Udnyttelse af hemicellulosehydrolysat til fremstilling af fede syrer}
author = {Hamann Spendler, F.}
abstractNote = {Cellulose fibers can be produced from straw by an organosolve process or similar week acid hydrolysis. The hydrolysate sugars can further be converted to volatile fatty acids by fermentation. The composition of the hydrolysate was analyzed. Xylose was predominant, but in a lower contration than expected from the overall COD-content. This study has shown that if the fermentation is carried out in a fixed film reactor, composition of the acid mixture in the broth yield and conversion speed are strongly dependent on pH and retention time. The production of the more valuable acids, such as lactic acid and butyric acid is favored by a pH around 6,0. Lactid acid should be produced at low retention times of app. 4 hours or less, whereas butyric acid requires retention times of 40 - 60 hours. Attempt to recover the acids by extraction with a solvent compose of tertiary amines and nonylphenol did not prove to be succesful. Other ways of recovering the acids reported in the litterature have been studied and are going to be tested out in the second phase of the project.}
place = {Denmark}
year = {1988}
month = {Jun}
}