Environmental Health Engineering and Management Journal

en Optimizing bioethanol production from cassava peels through agitation timing variation in separate hydrolysis and co-fermentation تخصصي Special مقاله اصیل Original Article <div style="text-align: justify;">Background: This study assessed the effect of various agitation timings on bioethanol production from cassava peels (CP) using separate hydrolysis and co-fermentation (SHCF) technique.<br> Methods: The milled CP was divided into three groups each of 20 g and subjected to two-stage hydrolysis carried out at 100 oC for 60 min and 50 minutes, respectively. Experimental layouts were Sample 1 (B1) [0 hours i.e., no shaking], Sample 2 (B2) [3 hours shaking with an electric shaker at 200 rev/min-1], and Sample 3 (B3) [6 hours shaking at 200 rev/min-1]. Fermentations were carried out at 30 oC for 72 days. Data were analyzed using descriptive statistics, one–way ANOVA, and New Duncan’s multiple range test at P = 0.05.<br> Results: The TSS and pH readings of the treatment groups before and after fermentation were: B1 – TSS (27.15 ± 0.15, 17.25 ± 0.07 oBx), pH (5.50 ± 0.00, 4.53 ± 0.04); B2 – TSS (27.32 ± 0.08, 14.78 ± 0.12 oBx), pH (5.50 ± 0.00, 4.74 ± 0.06); and B3 – TSS (27.17 ± 0.07, 10.24 ± 0.08 oBx), pH (5.50 ± 0.00, 4.77 ± 0.05) (P < 0.05). The mean fermentation efficiency (FE) and ethanol productivity (EP) were B1 (15.17 ± 0.07%, 0.122 ± 0.001 gL-1h-1), B2 (15.70 ± 0.18%, 0.126 ± 0.002 gL-1h-1), and B3 (18.80 ± 0.14%, 0.151 ± 0.001 gL-1h-1) (P < 0.05). All treatment groups attained the maximum ethanol yields at 72 hours of fermentation (P < 0.05). Agitation at 200 rev/min-1 for 6 hours gave the optimal FE (%), EP, and ethanol yield.<br> Conclusion: The established condition improved the Bioethanol quality and yield of CP. Thus, optimizing bioethanol production from CP would help enhance sustainable biofuel production without affecting food security.</div> Ethanol, Fermentation, Hydrolysis, Saccharomyces cerevisiae, Sugars 389 400 http://ehemj.com/browse.php?a_code=A-10-1-323&slc_lang=en&sid=1 Adewale Allen Sokan-Adeaga sokanadeaga. adewaleallen@yahoo.com 100319475328460013996 100319475328460013996 Yes Corresponding author: Department of Environmental Health Science, Faculty of Public Health, College of Medicine, Lead City University, Ibadan, Nigeria Godson R.E.E Ana gana@comui.edu.ng 100319475328460013997 100319475328460013997 No Department of Environmental Health Sciences, Faculty of Public Health, College of Medicine, University of Ibadan, Ibadan, Nigeria Abel Olajide Olorunnisola abelolorunnisola@yahoo.com 100319475328460013998 100319475328460013998 No Department of Wood Products Engineering, Faculty of Technology, University of Ibadan, Ibadan, Nigeria Edris Hoseinzadeh e.hoseinzadeh@savehums.ac.ir 100319475328460013999 100319475328460013999 No Incubation and Innovation Center, Saveh University of Medical Sciences, Saveh, Iran