title: Development and comparisons of efficient gas-cultivation systems for anaerobic carbon monoxide-utilizing microorganisms.
abstract: We describe a system for the cultivation of gaseous substrate utilizing microorganisms that overcomes some of the limitations of fixed volume culture vessels and the costs associated with sparging. Cali-5-Bond gas-sampling bag was used as the culture vessel. The bags contain approximately six times more mass of CO than the 40 mL vials at 1 atm of pressure and performed equally to the 40 mL vials in terms of their ability to maintain the composition of the gas over extended incubation times. Experiments using Clostridium ljungdahlii and CO as the sole carbon and energy source in both the gas sampling bag cultivation system and the traditional vial system demonstrated that this culture had a 15x increase in optical density in 24 h of incubation. The gas-sampling bags offer a viable alternative to gas sparging while overcoming the limitations of fixed volume culture vessels.
authors.affiliation: Dave C. Swalm School of Chemical Engineering, P.O. Box 9595, Mississippi State University, Mississippi State, MS 39762, USA.
authors.forename: Jack
authors.initials: J
authors.lastname: Ford
authors.forename: W
authors.initials: W
authors.lastname: Todd French
authors.forename: Rafael
authors.initials: R
authors.lastname: Hernandez
authors.forename: Emily
authors.initials: E
authors.lastname: Easterling
authors.forename: Mark
authors.initials: M
authors.lastname: Zappi
authors.forename: Christine
authors.initials: C
authors.lastname: Morrison
authors.forename: Margarita
authors.initials: M
authors.lastname: Licha
authors.forename: Lewis R
authors.initials: LR
authors.lastname: Brown
mesh_terms: D001421:Bacteria, Anaerobic; D001673:Biodegradation, Environmental; D002248:Carbon Monoxide / Q000302:isolation & purification*; D008828:Microbiological Techniques / Q000295:instrumentation* / Q000379:methods*; D008970:Molecular Weight; D009584:Nitrogen; D010100:Oxygen; D011312:Pressure
chemical_list: D002248:Carbon Monoxide; D009584:Nitrogen; D010100:Oxygen