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Characterization and improvement of oxygen transfer in pilot plant external air-lift bioreactor for mycelial biomass production

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dc.contributor.authorJin, B.
dc.contributor.authorYu, Q.
dc.contributor.authorYan, X.
dc.contributor.authorVan Leeuwen, J.
dc.date.issued2001
dc.description.abstractThe oxygen transfer dynamics in a pilot plant external air-lift bioreactor (EALB) during the cultivation of mycelial biomass were characterized with respect to hydrodynamic parameters of gas holdup (ε), oxygen transfer coefficient (KLa) and superficial gas velocity (U g), and dissolved oxygen (DO). An increased flow rate of air supply was required to meet the increased oxygen demand with mycelial biomass growth. Consequently, an increase in air flow rate led to an increase in ε, KLa and the DO level. The enhancement of oxygen transfer rate in the cultivated broth system, however, was limited with highly increased viscosity of the mycelial broth. An increase in air flow rate from 1.25 to 2.00 v/v/m resulted in a low increment of oxygen transfer. The newly designed pilot plant EALB with two air spargers significantly improved processing reliability, aeration rate and KLa. The pilot plant EALB process, operated under a top pressure from 0 to 1.0 bars, also demonstrated a significant improvement of oxygenation efficiency by more than 20% in DO and KLa. The performance of the two sparger EALB process under top pressure demonstrated an efficient and economical aerobic system with fast mycelial growth and high biomass productivity in mycelial biomass production and wastewater treatment.
dc.identifier.citationWorld Journal of Microbiology and Biotechnology, 2001; 17(3):265-272
dc.identifier.doi10.1023/A:1016622413185
dc.identifier.issn0959-3993
dc.identifier.issn1573-0972
dc.identifier.urihttp://hdl.handle.net/2440/47294
dc.language.isoen
dc.publisherKluwer Academic Publ
dc.source.urihttp://www.springerlink.com/content/x6537861n6637437/
dc.subjectBroth rheology
dc.subjectdissolved oxygen
dc.subjectexternal air-lift bioreactor
dc.subjectgas holdup
dc.subjectmycelial biomass
dc.subjectoxygen transfer
dc.titleCharacterization and improvement of oxygen transfer in pilot plant external air-lift bioreactor for mycelial biomass production
dc.typeJournal article
pubs.publication-statusPublished

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