WO treatments of 2e3 min at
205e210 C with 12 bar of oxygen gas produced higher ethanol yields and cellulose,
hemicelluloses, and lignin recoveries, than 15 min WO treatment at 195 C. Also, recycling
filtrate and use of higher oxygen gas pressure reduced recovery of materials. The use of
filtrate could be inhibitory for the yeast, but also reduced lactic acid formation in SSF.