Application Case: HT8700 Open-Path Analyzer for NH3 Emission Measurement at a Multi-Animal Shed Farm of Shanxi University

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 NH₃emissions 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 O₃in the atmosphere.

Project Objectives:

To understand the emission and dispersion patterns ofNH₃in livestock sheds, to comprehend the influence ofNH₃on the formation of secondary aerosols, and to employ models for accurate and comprehensive assessment of atmosphericNH₃.

Analysis Methods:

This project utilized an open-path laserNH₃analyzer (HT8700) for online measurement ofNH₃concentrations 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 laserNH₃analyzer.

Conclusion:

A comparison between the results of NH₃measurements obtained by the national standard method (nano-reagent spectrophotometric method) and the open-path laser NH₃analyzer (HT8700) revealed that HT8700 produced NH₃concentration 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 NH₃in 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 NH₃levels in the livestock farm.

Related papers: Li Ruijin, Geng Hong, and Fu Yuling from Shanxi University, "Multiple Livestock Houses in Livestock FarmsNH₃Research on Emission Measurement and Its Impact on Secondary Aerosol Formation

10.27284/d.cnki.gsxiu.2021.001027