Measurement of the change in aerosol size distribution with bacterial growth in a pilot scale fermentor

Krzysztof Szewczyk, Matti Lehtimäki, Man-Juan Pan, Usha Krishnan, Klaus Willeke (Corresponding Author), Diane Elliott, William Muth

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

A number of industrial processes require the addition of materials to the fermentation broth that are hazardous to health and environment. Agitation of broths inoculated with microorganisms can potentially release aerosols large enough to carry the microorganisms.
The influence of agitation, air flow, and bacterial growth on aerosol size distribution, air flow, and bacterial growth on aerosol size distribution was investigated in an industrial pilot scale fermentor. A decrease in particle concentration was observed with increase in bacterial growth; this change was more pronounced in the size range above 2 μm.
The aerosol size distribution was found to be practically independent of air flow rate and agitation rate for sizes less than 2 μm. However, for particles largar than 2 μm, the concentration was found to increase with an increase in air flow rate and agitation rate.
Original languageEnglish
Pages (from-to)243-245
JournalBiotechnology and Bioengineering
Volume39
Issue number2
DOIs
Publication statusPublished - 1992
MoE publication typeA1 Journal article-refereed

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Bioreactors
Aerosols
Air
Growth
Microorganisms
Flow rate
Fermentation
Health

Cite this

Szewczyk, K., Lehtimäki, M., Pan, M-J., Krishnan, U., Willeke, K., Elliott, D., & Muth, W. (1992). Measurement of the change in aerosol size distribution with bacterial growth in a pilot scale fermentor. Biotechnology and Bioengineering, 39(2), 243-245. https://doi.org/10.1002/bit.260390217
Szewczyk, Krzysztof ; Lehtimäki, Matti ; Pan, Man-Juan ; Krishnan, Usha ; Willeke, Klaus ; Elliott, Diane ; Muth, William. / Measurement of the change in aerosol size distribution with bacterial growth in a pilot scale fermentor. In: Biotechnology and Bioengineering. 1992 ; Vol. 39, No. 2. pp. 243-245.
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Szewczyk, K, Lehtimäki, M, Pan, M-J, Krishnan, U, Willeke, K, Elliott, D & Muth, W 1992, 'Measurement of the change in aerosol size distribution with bacterial growth in a pilot scale fermentor', Biotechnology and Bioengineering, vol. 39, no. 2, pp. 243-245. https://doi.org/10.1002/bit.260390217

Measurement of the change in aerosol size distribution with bacterial growth in a pilot scale fermentor. / Szewczyk, Krzysztof; Lehtimäki, Matti; Pan, Man-Juan; Krishnan, Usha; Willeke, Klaus (Corresponding Author); Elliott, Diane; Muth, William.

In: Biotechnology and Bioengineering, Vol. 39, No. 2, 1992, p. 243-245.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Szewczyk, Krzysztof

AU - Lehtimäki, Matti

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AU - Krishnan, Usha

AU - Willeke, Klaus

AU - Elliott, Diane

AU - Muth, William

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AB - A number of industrial processes require the addition of materials to the fermentation broth that are hazardous to health and environment. Agitation of broths inoculated with microorganisms can potentially release aerosols large enough to carry the microorganisms. The influence of agitation, air flow, and bacterial growth on aerosol size distribution, air flow, and bacterial growth on aerosol size distribution was investigated in an industrial pilot scale fermentor. A decrease in particle concentration was observed with increase in bacterial growth; this change was more pronounced in the size range above 2 μm. The aerosol size distribution was found to be practically independent of air flow rate and agitation rate for sizes less than 2 μm. However, for particles largar than 2 μm, the concentration was found to increase with an increase in air flow rate and agitation rate.

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