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Deniz Çekmecelioğlu

E-mail
denizc@metu.edu.tr
Department
Department of Food Engineering
Scopus Author ID
Distillers' dried grains with solubles (DDGS) and its potential as fermentation feedstock
Iram, Attia; Çekmecelioğlu, Deniz; Demirci, Ali (Springer Science and Business Media LLC, 2020-07-01)
Distillers' dried grain with solubles (DDGS) is a byproduct of bioethanol fermentation, which uses the dry milling technology for starch-rich grains such as corn, wheat, and barley. The current interest in bioethanol is in...
Production of Cellulase and Xylanase Enzymes Using Distillers Dried Grains with Solubles (DDGS) by Trichoderma reeseiat Shake-Flask Scale and the Validation in the Benchtop Scale Bioreactor
Çekmecelioğlu, Deniz; Demirci, Ali (Springer Science and Business Media LLC, 2020-01-01)
Most of the corn-ethanol plants use dry-mill process and generate large volume of distillers dried grains with solubles (DDGS) as the co-product. The DDGS is a promising feedstock with rich content of cellulose and xylan. ...
A Statistical Optimization Study on Dilute Sulfuric Acid Pretreatment of Distillers Dried Grains with Solubles (DDGS) As a Potential Feedstock for Fermentation Applications
Çekmecelioğlu, Deniz; Demirci, Ali (2019-11-01)
Distillers dried grains with solubles (DDGS) are co-product of dry-grind ethanol plant, which can be used as a feedstock for fermentation, e.g. for biofuels or other value-added products. However, DDGS loading is a critica...
Optimization of dilute sulfuric acid, aqueous ammonia, and steam explosion as the pretreatments steps for distillers' dried grains with solubles as a potential fermentation feedstock
Iram, Attia; Çekmecelioğlu, Deniz; Demirci, Ali (Elsevier BV, 2019-06-01)
Distillers' dried grains with solubles (DDGS) is the by-product of bioethanol production from starch-rich grains through dry-mill fermentation. In this study, dilute sulfuric acid hydrolysis, aqueous ammonia, and steam exp...
Improvement of Pectinase Production by Co-culture of Bacillus spp. Using Apple Pomace as a Carbon Source
Kuvvet, Ceren; UZUNER, SİBEL; Çekmecelioğlu, Deniz (2019-05-01)
Increasing interest in using food and agricultural wastes for low cost enzyme production continues in fermentation industry. Bacteria, especially Bacillus subtilis, are known to produce pectinases in synthetic media and me...
Heterotrophic growth and oil production from Micractinium sp. ME05 using molasses
Engin, Iskin Kose; Çekmecelioğlu, Deniz; Yücel, Ayşe Meral; Öktem, Hüseyin Avni (2018-12-01)
In this study the thermo-resistant green alga Micractinium sp. ME05 was cultivated in media containing molasses as a carbon source. Shake flask experiments and 2-L bioreactor experiments were conducted at different inoculu...
Assessment and optimization of xylanase production using co-cultures of Bacillus subtilis and Kluyveromyces marxianus
Yardimci, Gozde Oren; Çekmecelioğlu, Deniz (2018-06-25)
Co-cultures of Bacillus subtilis and Kluyveromyces marxianus were investigated in submerged fermentation for xylanase production at shake-flask scale. Xylanase production markedly increased when arabinose, xylose, or hazel...
Enhancement of Heterotrophic Biomass Production by Micractinium sp ME05
Engin, Iskin Kose; Çekmecelioğlu, Deniz; Yücel, Ayşe Meral; Öktem, Hüseyin Avni (2018-05-01)
In this study, heterotrophic growth conditions for Micractinium sp. ME05 cells were investigated for the improvement of biomass production. Plackett Burman (PB) method was used to screen process variables, namely, pH, carb...
Evaluation of heterotrophic and mixotrophic cultivation of novel Micractinium sp ME05 on vinasse and its scale up for biodiesel production
Engin, Iskin Kose; Çekmecelioğlu, Deniz; Yücel, Ayşe Meral; Öktem, Hüseyin Avni (2018-03-01)
Direct disposal of vinasse, a by-product of molasses fermentation plants, threatens environmental health. This study investigated the usage of vinasse as a nutrient source for the heterotrophic and mixotrophic cultivation ...
A novel oxidative destruction of lignin and enzymatic digestibility of hazelnut shells
Uzuner, Sibel; Sharma-Shivappa, Ratna R.; Çekmecelioğlu, Deniz; Kolar, Praveen (2018-01-01)
This study investigated the effect of sequential oxidative (ozonolysis) pretreatment and enzymatic hydrolysis of hazelnut shells on production of fermentable sugars. Two factors (ozone concentration and pretreatment time),...