Mass flow every 24h BCRL SSCF. Enzymes Biomass, Water EH. Liquid Ferm. broth
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1 Fig. S1 BCRL SHF Mass flow every 24h Enzymes Biomass, Water EH hydrolysate Ferm. Ferm. broth Enzymes Biomass, Water EH Whole hydrolysate SSCF Ferm. broth Solids buildup Solids buildup BCRL SHF EH (ml) BCRL SHF Ferm. (ml) EH (ml) SSCF (ml) Fig.S1 Tank setup and volume change for BCRL SHF and SSCF processes. The last step is denoted as cycle 6. Basically, the volume increase happened in the enzymatic hydrolysis (EH) tank for the BCRL SHF process and in the SSCF tank for BCRL SSCF process due to the buildup of solid residues. The last step of fermentation for BCRL SHF process was carried out in the EH tank after 24h hydrolysis without solid-liquid separation.
2 Fig. S a Xyl.6% Xyl.7% Xyl.9% EtOH.6% EtOH.7% EtOH.9% b Glc.6% Xyl.6% EtOH.6% Glc.7% Xyl.7% EtOH.7% Fig.S2 SHF fermentations of AFEX TM -CS hydrolysates derived from 6%, 7% and 9% glucan loading enzymatic hydrolysis (a), and SSCF of AFEX TM -CS at 6% and 7% glucan loading (b).
3 Fig. S3 b. % glucose % xylose Enzyme loading a 8.2% glucose 48.% xylose Ethanol production 12.1% glucose % xylose 6.% glucose 37.2% xylose 1.7% glucose 16.% xylose polymers oligomers Monomers e. Accellerase 1 protein: 6.33 g Accellerase XY protein:.63 g Multifect pectinase protein:.63 g - Yeast innoculum (Dry Weight): 7.9 g AFEX TM treated Corn stover 1Kg (Dry Weight) - Glucose: g - Xylose: g BCRL SHF - Ethanol: g -Glucose:.8 g -Xylose: 21.4 g - Oligo-glucose: 41.3 g - Oligo-xylose: 18.6 g Residual solids: - Glucose: 78.1 g - Xylose: 36.6 g f. Accellerase 1 protein: 1.2 g Accellerase XY protein: 1. g Multifect pectinase protein: 1. g - Yeast innoculum (Dry Weight): 8.4 g AFEX TM treated Corn stover 1Kg (Dry Weight) - Glucose: g - Xylose: g Enzyme loading a - Ethanol: 2.2 g -Glucose: 6.4 g -Xylose: 42.7 g - Oligo-glucose: 22.7 g - Oligo-xylose: 99.3 g Residual solids: - Glucose: 4.8 g Fig.S3 Mass balance of BCRL SHF and SSCF processes
4 Fig. S4 Conversion (%) Avicel-glc AFEX-CS.glc. AFEX-CS.xyl Control Fig.S4 Enzyme activities of proteins in the removed hydrolysate after enzymatic hydrolysis during fast SHF process. The assay was performed on Avicel and AFEX TM -CS. Monomeric glucose/xylose conversion is shown in the figure. The protein concentrations in each cycle hydrolysate were 3.2, 2.7, 2.6, 3.2 and 2.8 mg/ml. The control assumed all the enzymes were removed in the hydrolysate after cycle 1 (i.e., no enzyme recycle with unhydrolyzed solids stream). The protein concentration for the control was.2 mg/ml. The enzyme activity assay was conducted in micro-plates with working volume 1.ml/well, substrate loading 1 mg/well, protein loading 3 ug/well, reaction time 12h.
5 Fig. S a) Xyl.8 EtOH.8 2 Xyl.1 EtOH.1 1 Xyl.17 EtOH.17 1 Xyl. EtOH b) CFU/ml 2.x1 8 8 g/l 1 g/l 1.6x g/l g/l 1.2x1 8 8.x1 7 4.x Fig.S Effect of enzymatic hydrolysis residual solids concentration on fermentation in hydrolysate. Solids concentrations investigated included 8, 1, 17, and g/l. Fermentations were performed in 2ml shake flasks with ml working volume at 18 rpm, 32 o C, ph. and initial OD 2.. The initial glucose concentration was 43.8 ±1.4 g/l and was consumed completely in 24 h for all of the cases. The solids concentrations in cycle 1-6 of the process were around 88, 12, 13, 17, 18, and 18 g/l, respectively.
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