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Acquisition of Greenhouse gases and ammonia Emission factors specific to the Porcine Animal farms in France

Scientific and technical goals pursued by project AFEEP are the following:

• To acquire emission factors of quality for the animal farms of French pigs. The datas quality standards necessary to calculate the emission factors are:
  • the representativeness of the French animal farms conditions
  • the possibility of comparing the emission factors
  • the existence of metadata (given descriptive of the system, conditions of acquisitions)

The data will be gathered starting from robust methods allowing:

• To compare the emission factors obtained for various gases to highlight the practices driving to the lowest levels of the gas emissions
• Pooling, initially, within the framework of the Space-division switching Technological Animal farm and Environment then with other partners:
  • procedures of data acquisition on gas emissions
  • references of acquired emissions

The acquisition methods of current measurements are heavy and expensive. The variability of the current results cannot be only charged to the variability of the conduits but also to the impact of the measurements methods employed. In the majority of the cases, the data of gas emissions placed at the disposal are unusable because of the lack of information on the conditions of acquisition. That is why during the project, emissions will be measured using the same protocol on all farms, technical and climatic data will be recorded along with emissions measures.

On one hand, the literature provides data of seldom validated gas emissions (by comparison of methods). For example, it appears relevant to check that the measured ammonia emission factor is not higher than the total nitrogen losses (calculated by mass budget). On the other hand, the available data in the literature are, in most cases, for the comparison of systems and not for the determination of emissions used as absolute values in assessment tools factors.

The protocol of data acquisition rests on methods of innovating emission measurements implemented on a large scale for the first time in this project. It will be applied to a significant number of animal farms and under contrasted conditions (climate, techniques,…). To date, to the knowledge of the authors, no study of this width was undertaken in France and abroad. Moreover, simultaneous data acquisition of ammonia emissions and greenhouse gas emissions is a major innovation.

Financing: ADEME

Driver: IFIP

Partners: INRA UMR SAS, IFIP

Contact:nadine.guingand@ifp-asso.fr