FEATURES OF OBTAINING BIOHYDROGEN FROM CARBOHYDRATE-CONTAINING WASTE OF PROCESSED GRAIN

   This article provides information about the main methods for producing biohydrogen, describes the mechanism of acid hydrolysis and dark fermentation of carbohydrate-containing raw materials. The main types of hydrogen-producing bacteria that carry out dark fermentation under anaerobic conditions are presented, where the advantages of Escherichia coli bacteria in the production of hydrogen are noted.
   In addition, the description and the main results of studies on the production of biohydrogen, carried out with brewer's grains and post-alcohol grain stillage, where indicators of the ORP and pH of substrates with different concentrations of raw materials and conditions of pre-treatment were studied. Curves of changes in ORP over time were constructed, obtained from substrates with 4 % and 10 % concentrations of brewer's grains and distillery grain stillage under appropriate conditions for processing raw materials and using bacteria.

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