PRODUCTION AND PROPERTIES OF 2,3-BUTANEDIOL: XXIX. PILOT PLANT STUDIES ON FERMENTATION OF BARLEY BY AEROBACILLUS POLYMYXA AND RECOVERY OF THE PRODUCTS

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Abstract
Barley mashes were successfully fermented by Aerobacillus polymyxa on a pilot plant scale. In the laboratory a 12.5% mash appeared to be optimum but more concentrated mashes were efficiently fermented in the pilot plant. The hulls caused some mechanical difficulties, but these were overcome by eliminating right angle joints in the piping and by screening before recovery operations. Products were recovered by the same operations as for wheat. The lower raw material cost of barley resulted in an estimated reduction in the production cost of levo-2,3-butanediolof 7%, based on 1947 prices; or a reduction of 10%, based on a long-term average for 1908–1940.

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