| Title of Article |
Batch butanol fermentation from sugarcane molasses integrated with gas stripping system: Effect of sparger types and gas flow rates |
| Date of Acceptance |
4 September 2018 |
| Journal |
| Title of Journal |
Asia-Pacific Journal of Science and Technology |
| Standard |
SCOPUS |
| Institute of Journal |
Research and Technology Transfer Affairs Division of Khon Kaen University |
| ISBN/ISSN |
|
| Volume |
4 |
| Issue |
23 |
| Month |
October - December |
| Year of Publication |
2018 |
| Page |
|
| Abstract |
High butanol levels inhibit microbial metabolism and acetone-butanol-ethanol (ABE) fermentation. Gas stripping is a simple technique to separate solvents from a fermentation broth, which can improve butanol production during fermentation. Sparger types in gas stripping systems may affect the liquid-gas mass transfer. The aim of this study was to investigate the effects of sparger types (porous, ring and nozzle designs) and gas flow rates in a gas stripping system on butanol production from sugarcane molasses by Clostridium beijerinckii TISTR1461 in a batch fermentation. The gas stripping was started after 24 h of the fermentation, and the gas hold-up values were used to calculate the liquid-gas mass transfer for the gas stripping system. Results showed that a maximum cumulative butanol concentration (15.33 g/L) and butanol productivity (0.21 g/L.h) were achieved using a ring sparger at a gas flow rate of 1.0 L/min. Under these conditions, the gas hold up value (0.010) was maximal. The lowest cumulative butanol concentration (13.17 g/L) and butanol productivity (0.18 g/L.h) were obtained using a nozzle sparger, corresponding to a minimal gas hold up value of 0.003. In conclusion, the results demonstrated that the higher the gas hold up, the better the gas-liquid mass transfer attained. The fermentation using the gas stripping system increased the butanol concentration by approximately 44% compared to that of a fermentation without gas stripping. |
| Keyword |
butanol fermentation; Clostridium beijerinckii; gas hold up value; gas stripping system; sparger type |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ได้รับการตอบรับให้ตีพิมพ์ |
| Level of Publication |
นานาชาติ |
| citation |
false |
| Part of thesis |
true |
| Attach file |
|
| Citation |
0
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Publication
Journal Publication
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