High concentrations of cellulosic ethanol achieved by fed batch semi simultaneous saccharification and fermentation of waste-paper

► Batch addition of paper waste in SSSF results in up to 11.6% (v/v) ethanol. ► Low overall enzyme loadings (3.7 FPU/g substrate). ► High cumulative substrate loadings (65% w/v). ► High ethanol concentrations will improve distillation efficiencies.