Fig. 4
From: An environmentally friendly and productive process for bioethanol production from potato waste
Viscosity change of high-gravity SPRs when pectinase (a), cellulase (b) and mixtures (c) were used. All the reactions were performed at 45 °C and 200 rpm for 8 h with an initial pH of 4.8. The concentration of SPRs in reaction system was 36 % (w/v). Three independent replicates were carried out. a Solid squares represent the control, hollow squares represent 500 PGU/g dry SPRs, solid diamonds represent 1000 PGU/g dry SPRs, hollow diamonds represent 5000 PGU/g dry SPRs and solid triangles represent 10,000 PGU/g dry SPRs. b Solid squares represent 2 FPU/g dry SPRs, hollow squares represent 4 FPU/g dry SPRs, solid diamonds represent 6 FPU/g dry SPRs, hollow diamonds represent 8 FPU/g dry SPRs, and hollow triangles represent 10 FPU/g dry SPRs. c Solid squares represent 2 FPU/g dry SPRs; hollow squares represent 2 FPU/g dry SPRs + 500 PGU/g dry SPRs; solid diamonds represent 2 FPU/g dry SPRs + 1000 PGU/g dry SPRs; hollow diamonds represent 2 FPU/g dry SPRs + 2500 PGU/g dry SPRs; solid triangles represent 2 FPU/g dry SPRs + 5000 PGU/g dry SPRs; and hollow triangles represent 4 FPU/g dry SPRs