project - EIP-AGRI Operational Group

Reduction of ammonia emissions from heavy pigs with diets supplemented with benzoic acid - PigBen
Ridurre le emissioni di ammoniaca del suino pesante con diete additivate di acido benzoico - PigBen

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Completed | 2021 - 2023 Italy
Completed | 2021 - 2023 Italy
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Context

Intensive livestock farms, especially pig and poultry farms, are subject to environmental regulations aimed at limiting their impact not only on water and soil, but also on the atmosphere. In order to reduce emissions, the European Directive 2010/75/EU, known as the Industrial Emission Directive (IED) or former IPPC, subjects pig farms to the adoption of BATs (Best Available Techniques) among those identified in the BREF IRPP 2017 (Intensive Rearing of Poultry or Pigs).
Among the BAT techniques, an important importance is given to feeding strategies (BAT 3), i.e. those measures that, by intervening on the animals' diet, are able to condition the characteristics of the effluents with positive effects on the entire emission chain: housing, storage and spreading. This can be achieved, firstly, by adapting the protein content of the diets to the animals' needs during the various growth phases, but also by reducing the protein content (and consequently the nitrogen) of the diets and supplementing them with synthetic amino acids, so as to come as close as possible to the ratios envisaged by the 'ideal protein' and the 'minimum balanced protein'.
Further emission reductions could be achieved by acidifying manure; to this end, the BREF identifies benzoic acid, the use of which is authorised in pig feed by Regulation 1138/2007/EC, as a urine acidifier. Benzoic acid has an acidifying effect on intestinal contents, with a bacteriostatic effect that reduces the incidence of diarrhoea especially in young animals that are fed high levels of protein. This results in improved feed digestibility and production performance.

Objectives

The goal of the OG is to evaluate the effectiveness of benzoic acid in further reducing ammonia emissions when added to standard or low-protein diets and to evaluate how prolonged urine acidification can lead to an alteration of the bone metabolism of animals.

Objectives

Obiettivo del GO è di valutare l’efficacia dell’acido benzoico nel ridurre ulteriormente le emissioni ammoniacali quando aggiunto in diete a contenuto proteico standard o ridotto e valutare in che misura una prolungata acidificazione delle urine possa portare ad un’alterazione del metabolismo osseo degli animali.

Activities

IMPLEMENTATION OF DIETS SUPPLEMENTED WITH BENZOIC ACID
The trial will be conducted on 2 experimental groups of pigs. There will be 2 cycles: a winter cycle, with standard protein content diets, and a summer cycle, with low-protein content diets.
MEASUREMENT FROM THE GROWING STAGE
It will be measured the emissions of ammonia and the odors, from the barns of pigs fed with the addition of benzoic acid to both the standard and the low-protein diets.
MEASUREMENT OF NH3 EMISSIONS FROM THE SLURRY SPREADING
The ammonia emissions in the agronomic use of slurry will be assessed for slurry derived from the untreated pigs and from those fed with benzoic acid as supplement, for both standard and low-protein diets
 

Activities

APPLICAZIONE DELLE DIETE ADDIZIONATE DI ACIDO BENZOICO
La sperimentazione sarà condotta su 2 gruppi sperimentali di suini. Sono previsti 2 cicli: con diete a tenore proteico standard e con diete a basso tenore proteico.
MISURE DALLA FASE DI ALLEVAMENTO
Si misurano le emissioni di ammoniaca e odori dalle stalle dei suini alimentati con aggiunta di acido benzoico alla dieta standard e a quella a ridotto tenore proteico
MISURA DELLE EMISSIONI DI NH3 DALLA FASE DI SPANDIMENTO
Si valuta la entità delle emissioni ammoniacali nella fase di utilizzazione agronomica dei liquami per le tipologie di liquame che derivano dalle prove in stalla
 

Project details
Main funding source
Rural development 2014-2020 for Operational Groups
Rural Development Programme
2014IT06RDRP003 Italy - Rural Development Programme (Regional) - Emilia-Romagna
Location
Main geographical location
Reggio nell'Emilia
Other geographical location
Modena

EUR 178007.88

Total budget

Total contributions from EAFRD, national co-financing, additional national financing and other financing.

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2 Practice Abstracts

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Contacts

Project coordinator

  • CRPA - Centro Ricerche Produzioni Animali Soc. Cons. p.A.

    Project coordinator

Project partners