@article{Sertkaya_Keskin Gundogdu_Kennes_Azbar_2021, title={Bioethanol Production Through Syngas Fermentation by a Novel Immobilized Bioreactor Using Clostridium Ragsdalei}, volume={5}, url={http://icontechjournal.com/index.php/iij/article/view/183}, DOI={10.46291/ICONTECHvol5iss3pp13-20}, abstractNote={<p>Global energy demand has been escalating creating ever increasing pressure on climate crisis caused by fossil-based fuels. Humankind is now desperately in need of alternative and sustainable energy sources. Therefore, biofuels provide promising solution.</p> <p>Amongst the various biofuels, bioethanol from syngas, which is a mixture of, mostly, CO, CO<sub>2</sub>, N<sub>2</sub>, H<sub>2</sub>, and CH<sub>4</sub> gases has been drawing increasing attention recently. Regarding this, the conversion of syngas to bioethanol, an alternative biofuel to fossil fuels, is considered a promising approach to reduce the negative effects of global warming by reducing greenhouse gas emissions.</p> <p>In this study, a novel immobilized cell bioreactor, where <em>Clostridium ragsdalei</em> was grown, was designed and used to achieve an efficient production of ethanol regarding volumetric production. For this purpose, a 300 mL immobilized reactor filled with ceramic balls as immobilization material was set and operated at 30<sup>o</sup>C throughout the study where CO gas as the main substrate was fed at rate of 6 ml/min continuously. Results showed ethanol and acetic acid concentrations reaching up to 1.4 g/L and 0.2 g/L, respectively, after 600h with a volumetric production rate of 0,0023g ethanol/L/h. We believe, the ceramic ball was used for bioethanol production for syngas for the first time.</p>}, number={3}, journal={ICONTECH INTERNATIONAL JOURNAL}, author={Sertkaya, Simge and Keskin Gundogdu, Tugba and Kennes, Christian and Azbar, Nuri}, year={2021}, month={Sep.}, pages={13–20} }