Patent ID: 9034618
Filing Date: 2015-05-19
Classification: C01B,C12N,C12P,Y02E

Abstract:
1. A method for sustaining alcohol producing microorganism culture containing at least one acetogenic bacteria wherein said microorganism culture comprising one or more strains selected from Clostridium, Moorella, Carboxydothermus and their genetic modifications in a syngas fermentation reactor at an operating temperature in decreased concentration or absence of syngas comprising: adding carbon dioxide and optionally adding alcohol; maintaining free acetic acid concentration to less than 5 g/L free acetic acid; consuming alcohol in existing solution of said fermentation reactor; performing the above mentioned steps within 30 minutes of said decreased concentration or absence of syngas; comprising a ratio of less than 0.77 consumed alcohol to initial alcohol; and subsequently recovering the microorganism culture to produce alcohol; wherein said alcohol comprises one or more of ethanol and butanol.