Optimizing bioethanol production from cassava peels through agitation timing variation in separate hydrolysis and co-fermentation
Journal Title: Environmental Health Engineering and Management Journal - Year 2023, Vol 10, Issue 4
Abstract
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. 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. 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. 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.
Authors and Affiliations
Adewale Allen Sokan-Adeaga, Godson R. E. E Ana, Abel Olajide Olorunnisola, Edris Hoseinzadeh
Keywords
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- EP ID EP726685
- DOI 10.34172/EHEM.2023.42
- Views 65
- Downloads 0
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