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Batch butanol fermentation from sugarcane molasses integrated with a gas stripping system: Effects of sparger types and gas flow rates |
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| รหัสดีโอไอ | |
| Creator | Pattana Laopaiboon |
| Title | Batch butanol fermentation from sugarcane molasses integrated with a gas stripping system: Effects of sparger types and gas flow rates |
| Contributor | Thanawat Thanapornsin, Patthranit Sanchanda, Lakkana Laopaiboon |
| Publisher | Asia-Pacific Journal of Science and Technology |
| Publication Year | 2561 |
| Journal Title | Asia-Pacific Journal of Science and Technology |
| Journal Vol. | 23 |
| Journal No. | 4 |
| Page no. | 1-12 |
| Keyword | butanol fermentation,Clostridium beijerinckii,gas hold-up value,gas stripping system,sparger type |
| URL Website | https://www.tci-thaijo.org/index.php/APST/index |
| Website title | https://tci-thaijo.org/index.php/APST/article/view/132607 |
| ISSN | 2539-6293 |
| 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 theliquid-gas mass transfer. The aim of this study was toinvestigate the effects of sparger types (porous, ring and nozzle designs) and gas flow rates in a gas stripping system onbutanol production from sugarcane molasses by Clostridium beijerinckii TISTR1461in 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 amaximum cumulative butanol concentration (15.33g/L) and butanol productivity(0.21 g/L.h) were achievedusing 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. |
