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Laboratory, semi-pilot and room scale control of H2S emission from swine barns using nitrite and molybdate

Date

2009-12

Journal Title

Journal ISSN

Volume Title

Publisher

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Type

Degree Level

Masters

Abstract

Emission of odorous and gaseous compounds such as hydrogen sulphide (H2S) from livestock facilities can be a major impediment to its daily operations and potential expansion. Occupational and environmental concerns require the control of H2S emissions. A treatment approach used in the oil industry in which nitrite and/or molybdate are used as metabolic inhibitors to control the production of H2S in oil reservoirs was shown to be effective in controlling H2S emissions from swine manure. The addition of nitrite and molybdate to swine manure was investigated in closed laboratory scale systems and then evaluated in semi-pilot scale open systems and in specifically designed chambers aiming to simulate an actual swine barn. The effect of manure age (extent of storage) on H2S emissions and the levels of nitrite and molybdate required for effective control of these emissions were assessed. Laboratory scale tests showed that emission of H2S was dependent on manure age. Fresh manure emitted the highest level of H2S and the level of emission decreased as manure age (1-6 months) increased. With fresh 1, 3, and 6-month old manures average H2S concentration in the headspace gas of the closed systems were 4856„b460, 3431„b208, 1037„b98 ppm, and non-detectable (

Description

Keywords

H2S, swine manure, nitrite, molybdate, emission control, room scale test

Citation

Degree

Master of Science (M.Sc.)

Department

Environmental Engineering

Program

Environmental Engineering

Citation

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DOI

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