TECHNOLOGY FOCUS - BIOLOGY - Preferred Method: The method involves utilizing electrodialysis or electrodialysis reversal by applying voltage of 10-150 V across ion selective membranes passing through the saccharified biomass liquids. The method further involves (a) purifying the saccharified biomass liquids by chromatography, filtration, centrifugation, precipitation, distillation, or their combinations, and (b) decolorizing the saccharified biomass liquids using decolorizing agent. The precipitation process involves adding one or more solvents or non-solvents. Preferred Components: The saccharified biomass liquid comprises reduced recalcitrance, cellulosic and lignocellulosic material, where the cellulosic and lignocellulosic materials are subjected to treatment with ionizing radiation in the form of accelerated electrons. The biomass liquid is saccharified using sulfuric acid. The ionic strength of the saccharified biomass liquids before electrodialysis is 500-50000 mu S/cm and after electrodialysis is 1-100 mu S/cm. The salt is chosen from phosphorus, potassium, magnesium, sodium, calcium, sulfur, oxygen, manganese, aluminum, zinc, silicon, chlorine and iron. The solvent is chosen from methanol, ethanol, isopropanol, acetone, ethyl ether and tetrahydrofuran, preferably methanol. The saccharified biomass liquid comprises one or more fermentation products and saccharides. The fermentation product is alcohol, preferably ethanol. The saccharide is sugar chosen from xylose, glucose, arabinose, fructose and their mixtures. The purity of xylose is 80 wt.% or less and arabinose is 0-1 wt.% after electrodialysis. The decolorizing agent is chosen from powdered carbon, granular carbon, extruded carbon, bone char carbon, bead activated carbon, stryenic resin, acrylic resin, magnetic resin, decolorizing clay, bentonite, attapulgite, montmorillonite, hormite and their combinations. The biomass liquid has 5 or less color units, 10 or less color units or 100 or less color units after decolorization. EXAMPLE - No suitable example given.