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Introduction

The main aim of this guideline is to describe the development of a process for a reliable forecast of the ammonia emission by using as less days of measurement as possible. It is also preferable to take into account selection criteria of the days of measurement to improve the exactitude of the emissions. With this method, the ammonia concentration is modelled for each moment with an empirical model of ammonia emission adapted to a specific animal housing. This model can be applied in so far as some climatic variables are recorded continuously (T°C inside, T°C outside, flow of ventilation). Other variables are recorded periodically like the ammoniacal concentration or management variables like the weight and the number of animals.

The following diagram represents the intermittent process of measurements which considered the annual ammonia emission:

Observed variables are :

• Outside temperature (°C)
• Inside air temperature (°C)
• Number and weight of the animals (kg), in livestock buildings case
• Gas concentration (mg/m3)
• Ventilation rate (m3/h)
• Ammonia concentration using for example Photo-acoustic multi-gas monitor (ex: INNOVA)

Guideline details

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