Effets de la séparation des déjections porcines sous les planchers lattés sur les émissions gazeuses et d'odeurs

Authors: Lachance, Isabelle
Advisor: Marquis, Alfred; Godbout, Stéphane
Abstract: Literature has shown separating urine from feces and frequently removing both fractions is suitable for diminishing gas and odor emissions from pig building. On average, under-slat separation systems in piggeries can reduce ammonia and odor emissions by up to 50%. The focus of the present research study was to assess, in the same experimental design, the effect of diverse manure handling systems on various aspects relative to air quality. Twelve identical and completely independent experimental rooms were built. Each room housed four grower-finisher pigs from 30 to 80 kg over two 8-week period trials. Five treatments, of which three separation systems (V-shaped scraper, net, belt) were tested simultaneously. The scraping frequency and the effectiveness of the separation process were evaluated. Results showed there was a significant effect of the treatment on ammonia emissions (p=0.02). Without the solid-liquid separation, removing the manure every 2-3 days significantly reduced ammonia emissions by 46% (52.7 mg day-1 kgpig-1) compared to the control. Within a storage period of 2-3 days, the separation of the urine and feces directly under slats allowed a significant 49% (50.0 mg day-1 kgpig-1) reduction of ammonia emissions compared to the control. The different separation systems had the same ammonia reduction capacity. Results revealed there is no advantage at a statistically significant level (P> 0.05) for the separation process not for the removal frequency on carbon dioxide and methane emissions, within a week period. For the same period, it was not beneficial at a statistically significant level (P> 0.05) to separate excrement and urine directly under slats for reducing odor releases. Manure handling systems did not have an effect on the hedonic tone.
Document Type: Mémoire de maîtrise
Issue Date: 2005
Open Access Date: 11 April 2018
Permalink: http://hdl.handle.net/20.500.11794/18108
Grantor: Université Laval
Collection:Thèses et mémoires

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