TY - JOUR AU - Sertkaya, Simge AU - Keskin Gundogdu, Tugba AU - Kennes, Christian AU - Azbar, Nuri PY - 2021/09/25 Y2 - 2024/03/28 TI - Bioethanol Production Through Syngas Fermentation by a Novel Immobilized Bioreactor Using Clostridium Ragsdalei JF - ICONTECH INTERNATIONAL JOURNAL JA - iij VL - 5 IS - 3 SE - Articles DO - 10.46291/ICONTECHvol5iss3pp13-20 UR - http://icontechjournal.com/index.php/iij/article/view/183 SP - 13-20 AB - <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> ER -