Investigation of pre-treatment parameters of alder and triticale for bioethanol production

The pre-trcatment of alder and triticale at yellow ripeness and ripe by using steam explosion was investigated. Besides, the authors analysed the influence of steam pressure (from 20 to 22 bar), reaction time (from 180 to 240 s) and sulphuric acid strength (from 0 to 0.5%) on the pre-treatment and contents of monosaccharides (glucose, arabinose, xylose, mannose) and undesirable compounds (furfural and HMF) in hydroiysate. The greatest amount of dry matter is found in the hydroiysate of triticale of yellow ripeness (18.8%) when the strength of sulphuric acid is 0.5%, steam pressure-20 bar and reaction time 240 s. The greatest amount of useful monosaccharides used in bioethanol production such as glucose 6.1 %, arabinose 1.1 %, xylose 8.8% and mannose 0.8% were received from alder when the steam pressure was 22 bar, reaction time 240 s and the catalytic sulphuric acid strength 0.5%. The extraction of useful monosaccharides from alder was from 2.0 to 4.0 times less than from the ripe triticale at the same parameters ofhydrolysisVytauto Didžiojo universitetasŽemės ūkio akademij