Особенности получения кормовых аминокислот при культивировании коринебактерий на соевой мелассе

Abstract

Currently, soybeans and soybean derivatives are widely used for food and animal feed. A significant content of carbohydrates in soy molasses makes it possible to use it as a component of a nutrient medium for cultivating microorganisms that produce feed amino acids. The aim of this work was to study the process of biosynthesis of feed amino acids on a soy molasses medium using bacterial strains of the genus Corynebacterium glutamicum. The following research methods were used: microscopy, spectrometry, refractometry, pH-metry and high-performance liquid chromatography. It has been established that when cultivating on soy molasses, the strains C. glutamicum B-1002 and C. glutamicum B-1722 have the greatest ability to assimilate the components of the medium. The addition of such growth components as nicotinic acid and NaCl had no significant effect on the accumulation of C. glutamicum B-1002 and C. glutamicum B-1722 biomass. It has been proven that the best medium for cultivation of C. glutamicum is molasse that has gone through the entire technological process and contains the maximum amount of components necessary for the cultivation of C. glutamicum and the production of feed amino acids. The production of feed amino acids by C. glutamicum is influenced by such factors as dry matter content and active acidity of the medium. It was found that the best producers of feed acids are C. glutamicum B-1002 and C. glutamicum B-1722 strains cultivated on media composed of soy molasses and distilled water at a dilution of 1 : 9.