TY - JOUR
T1 - Effect of slurry funnels with partial pit ventilation on emissions from pig houses
AU - Hansen, Michael Jørgen
AU - Guldberg, Lise Bonne
AU - Feilberg, Anders
PY - 2023/4
Y1 - 2023/4
N2 - The aim was to investigate the emissions from a pig house with a novel funnel slurry system with partial pit ventilation. Two experimental pig houses were designed for growing finishing pigs (30–110 kg body mass) and were fitted with two-thirds slatted floor and one-third solid floor. One had a funnel slurry system (with partial pit ventilation) and the other a standard slurry system with a 600 mm deep slurry pit beneath the slatted floor. During two periods (each 77 d) ammonia was measured continuously by cavity-ring-down spectroscopy, odorants were measured by proton-transfer-reaction mass spectrometry over a period of seven days in each period and methane was measured weekly by gas chromatography. The results of the study showed that, compared to a standard slurry system, the funnel slurry system could lower the emission of ammonia by 10–30%, odour by 10–40%, and methane by 65–70%. Over the two periods with 10% partial pit ventilation the funnel slurry system collected ∼50% of ammonia and ∼30% of odour. When partial ventilation was increased to 20 or 30% over 24 h periods in the first period, the collection efficiency increased to ∼80% for ammonia and 45–60% for odour without increasing emissions compared to a standard slurry system. Thus, the funnel slurry system can lower emissions of both ammonia, odour and methane. Also, a substantial part of emitted ammonia and odour can be collected in partial pit ventilation for further treatment in an air cleaner.
AB - The aim was to investigate the emissions from a pig house with a novel funnel slurry system with partial pit ventilation. Two experimental pig houses were designed for growing finishing pigs (30–110 kg body mass) and were fitted with two-thirds slatted floor and one-third solid floor. One had a funnel slurry system (with partial pit ventilation) and the other a standard slurry system with a 600 mm deep slurry pit beneath the slatted floor. During two periods (each 77 d) ammonia was measured continuously by cavity-ring-down spectroscopy, odorants were measured by proton-transfer-reaction mass spectrometry over a period of seven days in each period and methane was measured weekly by gas chromatography. The results of the study showed that, compared to a standard slurry system, the funnel slurry system could lower the emission of ammonia by 10–30%, odour by 10–40%, and methane by 65–70%. Over the two periods with 10% partial pit ventilation the funnel slurry system collected ∼50% of ammonia and ∼30% of odour. When partial ventilation was increased to 20 or 30% over 24 h periods in the first period, the collection efficiency increased to ∼80% for ammonia and 45–60% for odour without increasing emissions compared to a standard slurry system. Thus, the funnel slurry system can lower emissions of both ammonia, odour and methane. Also, a substantial part of emitted ammonia and odour can be collected in partial pit ventilation for further treatment in an air cleaner.
KW - Ammonia
KW - Emission
KW - Methane
KW - Odour
KW - Pigs
KW - Slurry
UR - http://www.scopus.com/inward/record.url?scp=85152625152&partnerID=8YFLogxK
U2 - 10.1016/j.biosystemseng.2023.03.021
DO - 10.1016/j.biosystemseng.2023.03.021
M3 - Journal article
SN - 1537-5110
VL - 229
SP - 200
EP - 208
JO - Biosystems Engineering
JF - Biosystems Engineering
ER -