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03095aam a2200361Ia 4500 001 D4A14C56493011E49277FB87DAD10320 003 SILO 005 20141001010218 008 930621s1993 iau s000 0 eng d 035 $a (OCoLC)28303655 040 $a UIG $c UIG $d SILO 043 $a n-us-ia 100 1 $a Hammond, E. G. 245 10 $a Final report to the Iowa Highway Research Advisory Board on production of acetic acid by fermentation with propionibacteria (HR-321) / $c by E.G. Hammond, B.A. Glatz and C.E. Glatz. 246 3 $a Production of acetic acid by fermentation with propionibacteria 260 $a [Ames, Iowa : $b Iowa Dept. of Transportation, $c 1993] 300 $a 20 p. : $b ill. ; $c 28 cm. 500 $a "February 1993." 520 3 $a This project was undertaken jointly with a project supported by the Iowa Corn Promotion Board. Together the projects aimed at producing the organic acids, propionic acid and acetic acid, by fermentation.The impacts were to provide agriculturally-based alternatives to production of these acids, currently produced mainly as petrochemicals. The potentially high-demand use for acetic acid is as the "acetate" in Calcium Magnesium Acetate (CMA), the non-corrosive road deicer. Fermentation was, however, far from being an economically acceptable alternative. Gains were made in this work toward making this a feasible route. These advances included (1) development of a variant strain of propionibacteria capable of producing higher concentrations of acids; (2) comparison of conditions for several ways of cultivating free cells and establishment of the relative benefits of each; (3) achievementof the highest productivity in fertmentations using immobilized cells; (4) identification of corn steep liquor as a lower cost substrate for the fermentation; (5) application of a membrane extraction system for acid recovery and reduction of product inhibition; and (6) initial use of more detailed economic analysis of process alternatives to guide in the identification of where the greatest payback potential is for future research. At this point, the fermentation route to these acids using the propionibacteria is technically feasible, but economically unfeasible. Future work with integration of the above process improvements can be expected to lead to further gains in economics. However, such work can not be expected to make CMA a less expensive deicer than common road salt 513 $a Final report. 536 $a Sponsored by the Iowa Highway Division, Iowa Dept. of Transportation, Iowa Corn Promotion Board, and the Iowa Highway Research Board. $d HR-321 650 0 $a Acetobacter $z Iowa. 650 0 $a Acetic acid. $9 4950 650 0 $a Calcium magnesium acetate. $9 18807 700 1 $a Glatz, B. A. 700 1 $a Glatz, C. E. 710 1 $a Iowa. $b Highway Division. 710 1 $a Iowa. $b Highway Research Board. 710 2 $a Iowa Corn Promotion Board. $9 61839 941 $a 1 952 $l IAOX771 $d 20240710090309.0 956 $a http://locator.silo.lib.ia.us/search.cgi?index_0=id&term_0=D4A14C56493011E49277FB87DAD10320 994 $a 01 $b UIGInitiate Another SILO Locator Search