Pretreatment of Sweet Sorghum Bagasse for Ethanol Production Using Na2CO3 Obtained by NaOH Absorption of CO2 Generated in Sweet Sorghum Juice Ethanol Fermentation
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Methods
2.2.1. SSJ Fermentation and CO2 Capture
2.2.2. Pretreatment of SSB
2.2.3. Fermentation of Pretreated SSB in SSJ
2.2.4. Fermentation of Untreated SSB in SSJ
2.2.5. Analytical Methods
3. Results
3.1. SSJ Fermentation and CO2 Capture
3.2. Pretreatment of SSB
3.3. Fermentation of Pretreated SSB in SSJ
4. Discussion
5. Conclusions
Declaring
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Appendix A
References
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Results of Ethanol Fermentation | |||
Final Ethanol Concentration (g/L) | Ethanol Yield (% theoretical) | Total Ethanol Production (g) | Total CO2 Production (g) |
64.7 ± 1.4 | 85.2 | 334.2 | 319.5 (7.3 mol) |
Characteristics of Na2CO3 Solution | |||
pH | Na2CO3 concentration (M) | Absorption efficiency (%) | CO2 removal efficiency (%) |
11.2 | 2.30 ± 0.01 | 92.0 | 63.0 |
Glucan (%) | Xylan (%) | Arabinan (%) | AI lignin (%) | AS lignin (%) | Total Lignin (%) | |
---|---|---|---|---|---|---|
Raw SSB | 38.3 ± 3.9 | 20.6 ± 1.9 | 2.3 ± 0.3 | 17.7 ± 1.7 | 1.2 ± 0.2 | 18.9 ± 1.8 |
Pretreated SSB in small reactor | 47.0 ± 0.9 | 23.1 ± 0.4 | 2.1 ± 0.1 | 13.5 ± 0.3 | 1.0 ± 0.0 | 14.4 ± 0.3 |
Pretreated SSB in large reactor | 44.6 ± 1.5 | 24.4 ± 1.0 | 2.8 ± 0.1 | 14.7 ± 0.8 | 1.5 ± 0.0 | 16.2 ± 0.8 |
Loss during pretreatment in small reactor (%) | 0 | 8.1 | 24.7 | 37.8 | 35.0 | 37.7 |
Ethanol (g/L) | Xylose (g/L) | Ethanol Produced from SSB (g/g Pretreated SSB) | Xylose Yield from Xylan in SSB (% Theoretical) | Ethanol Yield from Glucan in SSB (% Theoretical) | |
---|---|---|---|---|---|
SSJ only (control) | 65.4 ± 2.1 | ||||
SSJ + Pretreated SSB | 75.3 ± 1.3 | 7.5 ± 0.7 | 0.15 | 56.9 | 81.7 |
Ethanol (g/L) | Xylose (g/L) | Ethanol Produced from SSB (g/g Pretreated SSB) | Xylose Yield from Xylan in SSB (% Theoretical) | Ethanol Yield from Glucan in SSB (% Theoretical) | |
---|---|---|---|---|---|
SSJ only (control) | 68.2 ± 0.1 | ||||
SSJ + Pretreated SSB | 69.5 ± 0.6 | 1.3 ± 0.1 | 0 | 11.0 | 0 |
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Nghiem, N.P.; Toht, M.J. Pretreatment of Sweet Sorghum Bagasse for Ethanol Production Using Na2CO3 Obtained by NaOH Absorption of CO2 Generated in Sweet Sorghum Juice Ethanol Fermentation. Fermentation 2019, 5, 91. https://doi.org/10.3390/fermentation5040091
Nghiem NP, Toht MJ. Pretreatment of Sweet Sorghum Bagasse for Ethanol Production Using Na2CO3 Obtained by NaOH Absorption of CO2 Generated in Sweet Sorghum Juice Ethanol Fermentation. Fermentation. 2019; 5(4):91. https://doi.org/10.3390/fermentation5040091
Chicago/Turabian StyleNghiem, Nhuan P., and Matthew J. Toht. 2019. "Pretreatment of Sweet Sorghum Bagasse for Ethanol Production Using Na2CO3 Obtained by NaOH Absorption of CO2 Generated in Sweet Sorghum Juice Ethanol Fermentation" Fermentation 5, no. 4: 91. https://doi.org/10.3390/fermentation5040091
APA StyleNghiem, N. P., & Toht, M. J. (2019). Pretreatment of Sweet Sorghum Bagasse for Ethanol Production Using Na2CO3 Obtained by NaOH Absorption of CO2 Generated in Sweet Sorghum Juice Ethanol Fermentation. Fermentation, 5(4), 91. https://doi.org/10.3390/fermentation5040091