Characteristics of hydrogen sulphide concentrations in mechanically ventilated swine buildings

Hydrogen sulphide (H sub 2 S) is produced by anaerobic fermentation of manure, and high concentrations are toxic to humans and animals. A H sub 2 S concentration of 50 ppm can cause dizziness, irritation of the respiratory tract, nausea, and headache. Death from respiratory paralysis can occur with...

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Bibliographic Details
Published in:Canadian biosystems engineering 2002-01, Vol.44, p.6.11-6.19
Main Authors: Ni, J-Q, Heber, A J, Diehl, CA, Lim, T T, Duggirala, R K, Haymore, B L
Format: Article
Language:English
Subjects:
Air quality management
Environmental aspects
Hog industry
Hydrogen sulfide
Indoor air pollution
Ventilation
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Summary:Hydrogen sulphide (H sub 2 S) is produced by anaerobic fermentation of manure, and high concentrations are toxic to humans and animals. A H sub 2 S concentration of 50 ppm can cause dizziness, irritation of the respiratory tract, nausea, and headache. Death from respiratory paralysis can occur with little or no warning when exposed to concentrations exceeding 1000 ppm (Field 1980). It has been responsible for many animal as well as human deaths in animal facilities (Field 1980; Anonymous 1996). The H sub 2 S concentration is usually very low in animal houses compared with other gases like carbon dioxide (CO sub 2 ) and ammonia (NH sub 3 ) in swine buildings. It was measured at 90 ppb in a normally ventilated confinement building and 280 ppb after the ventilation was shut off for six hours (Muehling 1970). The H sub 2 S concentration was 166 ppb in two naturally ventilated swine houses during a 63-day study in Indiana (Heber et al. 1997).
ISSN:1492-9058
1492-9066