Fig. 3From: Process design of SSCF for ethanol production from steam-pretreated, acetic-acid-impregnated wheat strawOverview of the four SSCF configurations investigated. A Batch SSCF (base case). B Fed-batch SSCF of the liquid, followed by the addition of solids at 48 and 50 h. C As in B, but with 4-h pre-hydrolysis of the liquid fraction. D As in C, but with 8-h pre-hydrolysis of the solid fractionBack to article page