The presence of glucose in pretreatment liquors was relatively low across most test conditions at about 12% or less (Table 5) and correlated well with increasing pretreatment severities. Only
under extreme pretreatment conditions (high temperature and acid levels) did yields approach 25% theoretical. Although relatively high, these values still fall short of fulfilling the summative
mass closure for glucose recoveries following cellulase digestion.As noted in the preceding section, a substantial proportion of this glucose persists as soluble glucan oligosaccharides and degradation compounds (discussed below) in pretreatment liquors. These observations are consistent with reported findings on steam exploded CGT