|Document ID (ISN)||66649|
|ISSN - Serial title
||1047-322X - Applied Occupational and Environmental Hygiene
|Convention or series no.
||Juozaitis A., Huang Y.L., Willeke K., Donnelly J., Kalatoor S., Leeson A., Wyza R.
||Dispersion of respirable aerosols in a fermenter and their removal in an exhaust system
||Aug. 1994, Vol.9, No.8, p.552-559. Illus. 28 ref.
||To study the potential release of aerosols from a fermenter, a measurement system was developed to explore respirable aerosol formation characteristics and controllability. The data indicated that the majority of effluent aerosol particles released were in the submicrometer range. This includes bacteria and growth products. Particle concentration counts in the exhaust system increased by a factor of 100 during the fermentation process. This dramatic increase was shown to correlate with bacterial growth, foaming, and subsequent breaking of the uppermost foam layer into small droplets by the mechanical foam breaker. The ceramic filter in the exhaust system of the fermenter removed over 98% of the aerosol particles by count larger than 0.7Ám diameter, but up to 50% by count of the 0.1 to 0.3Ám particles were released into the ambient air. Thus, while the exhaust removes most of the particle mass, extremely small bacteria may escape to the environment.
||microorganisms; aerosols; determination in air; exhaust ventilation; inhalation toxicity; fermentation
||bacteria; number concentration determination; particle size determination; fungi
||D - Periodical articles
|Country / State or Province||Lithuania; USA|
||Dust, aerosols and related diseases
|Broad subject area(s)