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Presentation
Use of Iodoform to Improve Lactic Acid Production in the Biomass Ensilage Conversion System
Agricultural and Biosystems Engineering Conference Proceedings and Presentations
  • Patrick Thomas Murphy, Iowa State University
  • Kenneth J. Moore, Iowa State University
  • Thomas L. Richard, Pennsylvania State University
  • Carl J. Bern, Iowa State University
  • Thomas J. Brumm, Iowa State University
Document Type
Conference Proceeding
Conference
2006 ASABE Annual International Meeting
Publication Date
7-1-2006
Geolocation
(45.5234515, -122.6762071)
Abstract
Iodoform, an iodine-containing compound used in antiseptic applications, has been found to be effective at selectivity inhibiting certain microbial populations. Application of iodoform in a hybrid fermentation system was investigated to determine the potential for increased lactic acid production by inhibiting undesirable microbes which can metabolize lactic acid. Iodoform treatment rates of 0, 0.03, 0.06, 0.11, and 0.23 g/kg dry matter (DM) were applied to a swine manure-corn stover substrate, containing 60 % manure, adjusted to 65 % moisture on a wet basis and ensiled for 0, 1, 7, and 21 days. A hemicellulase-cellulase enzyme mixture was also applied to all samples at a rate of 5 and 12.5 IU/g DM of hemicellulase and cellulase activity, respectively. Samples were analyzed for pH, water soluble carbohydrates, and organic acids. A substantial decrease in pH was observed in all treatments, but none of the treatments reached a pH of 4.5, which is sufficient for stable storage of corn stover biomass at 65 % moisture. Lactic and acetic acid production was increased with application of iodoform at 0.23 g/kg DM. Iodoform was also found to inhibit butyric fermentation, with a rate of 0.23 g/kg DM determined to be appropriate. Overall, iodoform can improve fermentation in the biomass ensilage conversion system by improving lactic acid production and inhibiting butyric fermentation.
Comments

This is an ASABE Meeting Presentation, Paper No. 067004.

Copyright Owner
American Society of Agricultural and Biological Engineers
Language
en
Citation Information
Patrick Thomas Murphy, Kenneth J. Moore, Thomas L. Richard, Carl J. Bern, et al.. "Use of Iodoform to Improve Lactic Acid Production in the Biomass Ensilage Conversion System" Portland, OR(2006)
Available at: http://works.bepress.com/thomas_brumm/16/