ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Nutrients in lactic acid fermentation. I. Various sources of sucrose

D. Haľama, P. Veľký, and V. Drahoš

Slovak Technical University, Bratislava

Abstract: For the lab. prepn. of lactic acid by Lactobacillus delbrueckii fermentation, 4 various substrates were applied: (1) sugar beet molasses, (2) crude sucrose soln. obtained from sugar beet molasses by the Steffen process, (3) raw beet sugar, and (4) pure sucrose. All substrates contained malt ext. or a concentrate of amino acids known as Peramin. According to the speed and yields of fermentation, the substrates can be classified in the following order: pure sucrose > crude sucrose from sugar beet molasses by the Steffen process > molasses > raw beet sugar. The optimum concn. for Peramin was 0.8-2 × 10^-2% and for malt ext. 0.8-1.2%. No correlation was found between the NH₂ N and the course of fermentation. A slight increase of CO₂ pressure in the substrate with pure sucrose inhibited fermentation greatly, while the substrate with molasses was not affected.

Full paper in Portable Document Format: 181a32.pdf (in Slovak)

Chemical Papers 18 (1) 32–44 (1964)