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dc.contributor.authorLiew, Emily
dc.contributor.authorNandong, Jobrun
dc.contributor.authorSamyudia, Yudi
dc.date.accessioned2017-01-30T11:41:20Z
dc.date.available2017-01-30T11:41:20Z
dc.date.created2010-01-14T20:02:00Z
dc.date.issued2009
dc.identifier.citationLiew, Emily and Nandong, Jobrun and Samyudia, Yudi. 2009. Experimental Investigation on the Impact of Aeration Rate and Stirrer Speed on Micro-Aerobic Batch Fermentation. Journal of Applied Sciences. 9 (17): pp. 3126-3130.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/14074
dc.description.abstract

The impact of aeration rate and stirrer speed on micro-aerobic fermentation is studied at laboratory scale. Result suggests that with Baker's yeast, an increase in aeration rates from very low value can improve bioethanol productivity and yield because it can enhance cell viability. At constant stirrer speed of 150rpm, the increase in aeration rate from 1LPM to 1.5LPM leads to proportional increase in peak oxygen uptake rate (OUR) from 600mM/L.h to 1000mM/L.h. This increase coincides with the increase in yield by 7.5%. Interestingly at constant aeration rate of 1.5LPM, an increase in stirrer speed from 150 rpm to 250rpm leads to decrease in peak OUR from 1000mM/L.h to 457mM/L.h but increase in yield by 64%. In conclusion, both stirrer speed and aeration rate are important factors which have complex impacts on hydrodynamics and microbial metabolism, which in turn affect productivity and yield. Further work using CFD modeling and simulation method is required to gain better insights into how aeration rate and stirrer speed affect metabolism via the mixing mechanisms in a bioreactor.

dc.publisherAsian Network for Scientific Information
dc.subjectFermentation
dc.subjectMicro-aerobic
dc.subjectMixing
dc.subjectEthanol
dc.titleExperimental Investigation on the Impact of Aeration Rate and Stirrer Speed on Micro-Aerobic Batch Fermentation
dc.typeJournal Article
dcterms.source.volume9
dcterms.source.number17
dcterms.source.startPage3126
dcterms.source.endPage3130
dcterms.source.issn18125654
dcterms.source.titleJournal of Applied Sciences
curtin.departmentCurtin Sarawak - Faculty Office
curtin.accessStatusOpen access
curtin.facultySarawak
curtin.facultyMiri Campus
curtin.facultyDepartment of Chemical Engineering


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