A Test-Bench for Infrared Photoacoustic Analyzers Used to Measure Gas Emissions from Animal Houses and Manure Storage
Animal production is recognized as a major source of ammonia and greenhouse gases despite the high uncertainty associates to current estimates.Mitigation strategies are proposed to decrease the emissions.International standards exist for the national emission inventories or for the composition analysis of manure or soils but not for the measuring methods and associated uncertainty of the emissions of animal production.This limits considerably the quality control and the certification of existing reductions.One of the key measurements is the concentration increase of ammonia or greenhouse gas due to the animal production.Many research teams in the world have chosen Infrared photoacoustic spectroscopy analyzers(PAS ; e.g.INNOVA(R)1312 or 1412)to measure selectively the concentrations of ammonia and greenhouse gases.Network activity between them is difficult because different PAS can give different concentrations because of differences in configuration or maintenance: the chosen filters can compensate for different cross interferences.different concentrations used for calibration can induce differences in measurements,a significant drift in calibration can appear due to the infrared source or the microphones or changes following the use in highly contaminated environments.Therefore,INRA and IFIP,with the financial support of ADEME,developed a test bench that can be used to compare different PAS,to check the calibration drift during a project,to evaluate the effect of not compensated interferences when using a PAS in a new animal production system.Equipment and software allow the rapid preparation of gas mixtures with ammonia,nitrous oxide,methane,carbon dioxide at different concentration levels diluted in dinitrogen.The uncertainty of the concentrations in the mixture is evaluated based on the uncertainties of the flow meters and the gas bottles.The con-centrations measured by the PAS are compared in real time with the concentrations of the gas mixtures.
M.Hassouna,M Grandpierre,B Robin,P Guingand,N
INRA,UMR 1069,65 rue de Saint-Brieuc,35042 Rennes,France IFIP Institut du porc - La motte au Vicomte-35651 LE RHEU cedex-France
国际会议
XVIth International Congress on Animal Hygiene(第十六届动物卫生国际会议(ISAH 2013))
南京
英文
648-650
2013-05-05（万方平台首次上网日期，不代表论文的发表时间）