Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Ionic liquid pretreatment allows utilization of high substrate loadings in enzymatic hydrolysis of biomass to produce ethanol from cotton stalks
Date
2013-11-01
Author
Haykir, Nazife Isik
Bakir, Ufuk
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
212
views
0
downloads
Cite This
To enhance the enzymatic conversion of cotton stalks to glucose at high substrate loadings and subsequently to produce ethanol, biomass was subjected to ionic liquid and alkaline pretreatments. Ionic liquid, 1-ethyl-3-methylimidazolium acetate (EMIMAc), which reduced biomass crystallinity, was effective in improving the conversion of cotton stalks to glucose (82-85%) regardless of the substrate loading used during enzymatic hydrolysis. On the other hand, the glucose yield decreased from 67% to 55% with an increase in substrate loading from 3% to 15% (w/v) for the alkaline pretreated biomass. Fermentation of the glucose obtained upon enzymatic hydrolysis of the pretreated cotton stalks at the highest substrate loading (15%) resulted in ethanol yields of 74% and 46% for EMIMAc and alkaline pretreated biomass, respectively. These results highlight the advantage of EMIMAc pretreatment to maintain increased substrate loadings during enzymatic hydrolysis of lignocellulosic biomass for achieving high concentrations of products with improved yields.
Subject Keywords
Agronomy and Crop Science
URI
https://hdl.handle.net/11511/64795
Journal
INDUSTRIAL CROPS AND PRODUCTS
DOI
https://doi.org/10.1016/j.indcrop.2013.10.017
Collections
Department of Chemical Engineering, Article
Suggestions
OpenMETU
Core
Simultaneous dissolution and uptake of nutrients in microalgal treatment of the secondarily treated digestate
Ulgudur, Nilufer; Bayramoğlu, Tuba Hande; Demirer, Goksel N. (Elsevier BV, 2019-11-01)
Anaerobic digestion processes result in large volumes of digestates which still require the development of elaborate and viable management options to improve the sustainability of these processes. Coupling of secondary anaerobic treatment with a microalgal nutrient removal process may serve benefits such as residual biogas and associated greenhouse gas capture from the digestate content, microalgal biomass build-up and its further valorization. This study investigated the applicability a microalgal nutrient...
Micromeria myrtifolia: The influence of the extracting solvents on phenolic composition and biological activity
Sarikurkcu, Cengiz; Hanine, Hafida; Sarikurkcu, Rabia Busra; Sarikurkcu, Rifat Tayyib; Amarowicz, Ryszard (Elsevier BV, 2020-03-01)
Currently, there is much interest in using the active compounds that exist in plants as natural treatments. The pharmaceutical industry is also looking for novel chemical compounds from natural sources that do not have side effects. The purpose of this study was to identify the antioxidant and enzymatic inhibition activities of different extracts (ethyl acetate, methanol and water) of Micromeria myrtifolia from Turkey. The phenolic constituents in the extracts were also identified using liquid chromatograph...
Anaerobic acidification of sugar-beet processing wastes: Effect of operational parameters
Alkaya, Emrah; Demirer, Göksel Niyazi (Elsevier BV, 2011-01-01)
The objective of this study was to maximize the hydrolysis and acidification of sugar-beet processing wastewater and beet pulp for volatile fatty acid (VFA) production through acidogenic anaerobic metabolism. Experiments were conducted to determine the optimum operational conditions (HRT, waste-mixing ratio and pH) for effective acidification in daily-fed, continuously mixed anaerobic reactors. For this purpose, reactors were operated at 35 +/- 1 degrees C with different combinations of HRT (2-4 days), wast...
KINETIC COMPENSATION RELATIONS FOR ASCORBIC-ACID DEGRADATION AND PECTINESTERASE INACTIVATION DURING ORANGE JUICE PASTEURIZATION
ULGEN, N; OZILGEN, M (Wiley, 1991-01-01)
The thermal degradation kinetics of ascorbic acid and the inactivation kinetics of pectinesterase were studied experimentally with pH-adjusted orange juice. No simple trends were observed in variation of the kinetic parameters with pH, but both kinetic functions agreed with kinetic compensation relations. An isokinetic temperature was observed for ascorbic acid degradation at pH 2.5, 3.0, and 3.5 implying that the same degradation mechanism was valid at these pH values. A large deviation at pH 4.0 from t...
Bioactivity-guided isolation of cytotoxic secondary metabolites from the roots of Glycyrrhiza glabra and elucidation of their mechanisms of action
Cevik, Dicle; Yilmazgoz, S. Burcin; KAN, YÜKSEL; Guzelcan, Ece Akhan; Durmaz, Irem; Atalay, Rengül; KIRMIZIBEKMEZ, HASAN (Elsevier BV, 2018-11-15)
Licorice (Glycyrrhiza glabra L.) is one of the most widely used plants worldwide for its various pharmacological activities. The aim of this study was to isolate the potential cytotoxic secondary metabolites from the MeOH extract prepared from the roots of Glycyrrhiza glabra through bioactivity-guided isolation procedure and to elucidate their mechanisms of action. The crude MeOH extract as well as CHCl3 and EtOAc subextracts significantly inhibited cell proliferation on hepatocelullar (Huh7), breast (MCF7)...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
N. I. Haykir and U. Bakir, “Ionic liquid pretreatment allows utilization of high substrate loadings in enzymatic hydrolysis of biomass to produce ethanol from cotton stalks,”
INDUSTRIAL CROPS AND PRODUCTS
, pp. 408–414, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64795.