Abstract
Harmful gases such as ammonia and hydrogen sulfide in livestock and poultry houses can seriously damage the health of livestock and poultry as well as animal keepers, so it is great significant to detect these harmful gases rapidly and accurately for the improvement of the welfare of animals and the health of animal keepers. Laser absorption spectroscopy is a gas detection method with the advantages of high sensitivity and selectivity, and is widely used in industrial gas detection. However, it needs further exploring to verify whether laser absorption spectroscopy is useful in detecting low concentration harmful gases in livestock and poultry houses. This paper researches on the method for high-sensitivity detection of harmful gases in livestock and poultry houses based on laser absorption spectroscopy by detecting the absorption signals of ammonia with a self-designed system including a tunable laser wavelength scanning system, a photoelectric detecting system and a long light path gas absorption well, and verifies that laser absorption spectroscopy can be used for detecting harmful gases in livestock and poultry houses.
Highlights
With the development of economy, livestock breeding has shifted from retail breeding to large-scale breeding
In cold winter, the livestock and poultry houses are often closed to keep a suitable temperature for the growth of the animals and cannot be ventilated regularly, and the concentration of NH3, H2S, CH4 and other harmful gases remains at a high level, which will make the animals sick or even dead[1]
This paper researches on the method for high-sensitivity detection of harmful gases in livestock and poultry houses based on laser absorption spectroscopy by detecting the ammonia with a Tunable diode laser absorption spectroscopy (TDLAS) system, and provides methods and technical supports for intelligent gas monitoring system in livestock and poultry houses
Summary
With the development of economy, livestock breeding has shifted from retail breeding to large-scale breeding. In cold winter, the livestock and poultry houses are often closed to keep a suitable temperature for the growth of the animals and cannot be ventilated regularly, and the concentration of NH3, H2S, CH4 and other harmful gases remains at a high level, which will make the animals sick or even dead[1]. Compared with other complex systematic analysis methods, TDLAS has the advantages of high sensitivity, high selectivity, rapid response[6], small size and easy operation, and it is widely used in industrial gas detection.[7] it still needs further studying and verifying to see whether TDLAS can be used for detecting harmful gases stably and accurately in complicated livestock and poultry houses for long time. This paper researches on the method for high-sensitivity detection of harmful gases in livestock and poultry houses based on laser absorption spectroscopy by detecting the ammonia with a TDLAS system, and provides methods and technical supports for intelligent gas monitoring system in livestock and poultry houses
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