DYNAMICS OF CARBOHYDRATES YIELD DURING THE HIGH TEMPERATURE HYDROLYSIS OF WHEAT STRAW WITH SULFUROUS ACID
Kharina M.V.1*, Emelyanov V.M.1, Ablaev A.R.1, Mokshina N.E.2, Ibragimova N.N.2, Gorshkova T.A.2
Kazan National Research Technological University, 68 Karl Marx street, Kazan, 420015, (Russian Federation), e-mail: emelianov@front.ru
Institute of Biochemistry and Biophysics, Kazan Scientific Center of the Russian Academy of Sciences, 2/31 Lobachevsky street, Kazan, 420111, (Russian Federation), e-mail:  gorshkova@mail.knc.ru

*Corresponding author

The influence of temperature and time treatment on the composition and content of carbohydrates of wheat straw hydrolysates with sulfurous acid (0.59 and 1.18% wt.) was investigated. The maximum yield of sugars in hydrolysates obtained at temperatures of 150-200 ºC did not exceed 10% of the total carbohydrate content of the straw. Irrespective of the temperature effects in the hydrolysates xylose predominated (48,4-55,1 mol% of monosaccharides). The dynamics of mono-, oligo-and polysaccharide yeld during hydrolysis of wheat straw with sulfurous acid 0.59% wt. at 190ºC was analyzed. Due to the high content of pentoses, and in particular, xylose, obtained hydrolysates for produce xylose, xylitol and furfural, fodder yeast could be used. 

Key words: wheat straw, hydrolysis, sulfurous acid, high performance anion exchange chromatography , monosaccharides