Project Location:

A farm in Beitousi Village, Yuci District, Jinzhong City, Shanxi Province, where pigs, cows, and sheep are simultaneously raised.

Project Background:

With the development of society and the expansion of the livestock industry, the impact of agricultural NH₃ emissions on environmental air quality has been increasing. These emissions have a significant presence in the natural environment and can promote the formation of secondary aerosols and haze, even indirectly affecting the production of O₃ in the atmosphere.

Project Objectives:

To understand the emission and dispersion patterns of NH₃ in livestock sheds, to comprehend the influence of NH₃ on the formation of secondary aerosols, and to employ models for accurate and comprehensive assessment of atmospheric NH₃.

Analysis Methods:

This project utilized an open-path laser NH₃ analyzer (HT8700) for online measurement of NH₃ concentrations in the livestock farm. The analyzer was mounted on a mobile platform (Figure 2.3a) and included the Healthy Photon HT8700 Atmospheric Ammonia Laser Open-Path Analyzer, data acquisition module, GPS module, ultrasonic three-dimensional wind speed module, and real-time data processing module (Figure 2.3b).

The project conducted a comparative experiment on measurement accuracy between the nano-reagent spectrophotometric method (HJ533-2009) and the open-path laser NH₃ analyzer.

Conclusion:

A comparison between the results of  NH₃ measurements obtained by the national standard method (nano-reagent spectrophotometric method) and the open-path laser  NH₃ analyzer (HT8700) revealed that HT8700 produced  NH₃ concentration values higher than those of the national standard method. However, these differences were within an acceptable range and did not hinder the use of HT8700 for measuring  NH₃ in the livestock farm. HT8700 is an open-path, real-time measurement instrument that is convenient and flexible, making it suitable for capturing short-term fluctuations in  NH₃ levels in the livestock farm.

相关论文：山西大学李瑞金、耿红、付玉玲《养殖场多畜舍NH₃排放测量及对二次气溶胶形成的影响研究》

10.27284/d.cnki.gsxiu.2021.001027