Effects of a partial pit ventilation system on indoor air quality and ammonia emission from a fattening pig room

Saha, Chayan Kumer; Zhang, Guoqiang; Kai, Peter; Bjerg, Bjarne

doi:10.1016/j.biosystemseng.2009.11.006

Cited by 65 publications

(50 citation statements)

References 18 publications

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“…Automatic ventilation systems in barns, led to a reduction in MORT. According to Saha et al (2010) the purpose of the ventilation system is to maintain a particular temperature while controlling levels of humidity and removing gaseous contaminants introduced by the animal and their waste. Therefore, the efficient removal of gases and moisture will depend on the type of ventilation control system used.…”

Section: Discussionmentioning

confidence: 99%

Management factors affecting mortality, feed intake and feed conversion ratio of grow-finishing pigs

Agostini

Fahey

Manzanilla

et al. 2014

Animal

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The aim of this study was to determine the effect of animal management and farm facilities on total feed intake (TFI), feed conversion ratio (FCR) and mortality rate (MORT) of grower-finishing pigs. In total, 310 batches from 244 grower-finishing farms, consisting of 454 855 Pietrain sired pigs in six Spanish pig companies were used. Data collection consisted of a survey on management practices (season of placement, split-sex by pens, number of pig origins, water source in the farm, initial or final BW) and facilities (floor, feeder, ventilation or number of animals placed) during 2008 and 2009. Results indicated that batches of pigs placed between January and March had higher TFI ( P = 0.006), FCR ( P = 0.005) and MORT ( P = 0.03) than those placed between July and September. Moreover, batches of pigs placed between April and June had lower MORT ( P = 0.003) than those placed between January and March. Batches which had split-sex pens had lower TFI ( P = 0.001) and better FCR ( P < 0.001) than those with mixed-sex in pens; pigs fed with a single-space feeder with incorporated drinker also had the lowest TFI ( P < 0.001) and best FCR ( P < 0.001) in comparison to single and multi-space feeders without a drinker. Pigs placed in pens with <50% slatted floors presented an improvement in FCR ( P < 0.05) than pens with 50% or more slatted floors. Batches filled with pigs from multiple origins had higher MORT ( P < 0.001) than those from a single origin. Pigs housed in barns that performed manual ventilation control presented higher MORT ( P < 0.001) in comparison to automatic ventilation. The regression analysis also indicated that pigs which entered to grower-finisher facilities with higher initial BW had lower MORT ( P < 0.05) and finally pigs which were sent to slaughterhouse with a higher final BW presented higher TFI ( P < 0.001). The variables selected for each dependent variable explained 61.9%, 24.8% and 20.4% of the total variability for TFI, FCR and MORT, respectively. This study indicates that farms can increase growth performance and reduce mortality by improving farm facilities and/or modifying management practices.

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Section: Discussionmentioning

confidence: 99%

Management factors affecting mortality, feed intake and feed conversion ratio of grow-finishing pigs

Agostini

Fahey

Manzanilla

et al. 2014

Animal

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“…However, the air purification system is quite expensive because of high investment and operation costs related to energy, chemical and filter consumption and maintenance for both ventilation and purification systems (Melse et al, 2009). One proposed strategy to reduce the costs is cleaning only a partial amount (e.g., 10% of the maximum ventilation rate) of exhaust air extracted from the main source zone where highly concentrated air pollutants originated from (Saha et al, 2010;Zong et al, 2014a). A partial pit ventilation (PPV) system with an extra pit exhaust under slatted floor has therefore been developed.…”

Section: Introductionmentioning

confidence: 99%

Ammonia and greenhouse gas emissions from fattening pig house with two types of partial pit ventilation systems

Zong

2015

Agriculture, Ecosystems & Environment

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“…NH 3 is a colorless and gaseous irritant which is lighter than air and soluble in water. NH 3 is the most abundant alkaline constituent in the atmosphere, which is considered to be the crucial factor on air quality and has a significant influence on the animal welfare and human health [5,6]. This noxious gas may cause eye irritant, respiratory ailment such as coughing, upper respiratory tract bleeding, excessive secretion, etc.…”

Section: Introductionmentioning

confidence: 99%

Measurement and analysis of ammonia emission from a pig farm in the northeast of China

Xu¹,

Guan²

2014

Ecological Chemistry and Engineering S

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Abstract:China is the largest swine production country in the world. The fast development has consequently brought various environmental issues which have already seriously threatened the environmental quality. This study is aimed to measure the concentrations of NH3 in the pig houses in the selected pig farm, try to conclude characteristics on the concentration change and the correlation between the concentrations and the environmental factors. The NH3 concentration was monitored in two fattening pig houses. The concentrations fluctuated between 11.0 and 26.9 ppm, 11.0 and 28.5 ppm respectively during the measurement periods, peaking at the early morning and in the afternoon before cleaning. The concentrations of NH3 correlated to the indoor temperature in winter, whereas, there was no correlation between relative humidity and NH3 concentrations.

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Effects of a partial pit ventilation system on indoor air quality and ammonia emission from a fattening pig room

Cited by 65 publications

References 18 publications

Management factors affecting mortality, feed intake and feed conversion ratio of grow-finishing pigs

Management factors affecting mortality, feed intake and feed conversion ratio of grow-finishing pigs

Ammonia and greenhouse gas emissions from fattening pig house with two types of partial pit ventilation systems

Measurement and analysis of ammonia emission from a pig farm in the northeast of China

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