Saraz method adjustment for the quantification of ammonia emissions generated in opened or hybrid animal production facilities (original) (raw)

The objective of this study was to evaluate the efficiency of the Saraz method in order to quantify ammonia emissions generated in opened or hybrid animal production facilities, and to determine an equation for the adjustment method. To do this, we developed beacon equipment, with input and output gas sectors, hoods and absorbent porous material. After the collection, the amount of ammonia captured in the environment was determined in the laboratory. Different ammonia concentrations were evaluated in addition to the different speeds of the exhaust air. Considering the results, it can be concluded that for the situations analyzed the Saraz method is efficient, but as with other methods, with an increase of air velocity and concentration, its efficiency decreases. An equation for the adjustment of the Saraz method was generated to determine the concentration and the rate of ammonia emissions inside animal facilities.

Accuracy of SMDAE to Determine Ammonia Concentration in Animal Facilities in Hot Climates

2016

Considering the importance of developing reliable methodologies and low cost methods to determine ammonia concentration in animal buildings the main objective of this study was to evaluate the accuracy of SMDAE (Saraz Method for Determination of Ammonia Emissions) to quantify the ammonia concentration inside of animal facilities located in Minas Gerais, Brazil. Results obtained with SMDAE were compared to those obtained by electrochemical sensors located inside of a controlled chamber with known concentrations of 5, 10, 15, 20 and 25 ppm of ammonia. It can be concluded that the SMDAE is satisfactory accurate within the analyzed ranges. However, this accuracy is reduced for higher values of ammonia concentration. With this results an equation was adjusted for SMDAE to determine the concentration of ammonia in the environment.

Validation of Five Gas Analysers for Application in Ammonia Emission Measurements at Livestock Houses According to the VERA Test Protocol

Applied Sciences

Ammonia emissions are an important issue in livestock production. Many mitigation measures have been proposed in order to reduce the environmental impact of livestock farms, and reliable field measurements are required to evaluate the amount of released or reduced ammonia while applying these measures. Following the guideline of the Verification of Environmental Technologies for Agricultural Production test protocol, five commercially available gas analysers, i.e., INNOVA 1314, Picarro G2103, Rosemount CT5100, Gasmet CX4000, and Axetris LGD F200-A, were validated as alternative methods to the wet-chemistry method (reference method) for measuring ammonia in livestock houses. High correlations ( r > 0.99 ) were found between the analysers and the reference method. The measurement errors of the tested analysers were below 2 ppmv or 10%. Equivalence to the wet-chemistry method was demonstrated for the INNOVA and Rosemount analysers without a recalibration and for the Picarro and Axet...

A Simplified Method for Evaluation of Ammonia Release in Animal Production Systems

Determinations of the level of ammonia release in animal houses require measurements of concentrations and ventilation rates which often leads to expensive equipments and considerable labour demands. The ventilation rate will also vary considerably dependent on the outside temperature which makes it difficult to evaluate and compare measurements from different climatic conditions. The objective has therefor been to develop a simple method which gives a characterisation of the ammonia release independently on ventilation rate and outside temperature. Analyses show that two ratios TR and CR determined by measurements of ammonia concentrations and differences in temperature (TR) and carbon dioxide concentrations (CR) between indoor and outdoor air may give characteristic values of the release in-dependently of ventilation rate. The values of TR and CR are also possible to determine with simple equipments as reagent tubes and thermometers. Limitations occur at high outside temperatures ...

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