AMMONIA VOLATILIZATION AND DUST CONCENTRATION AS AFFECTED BY VENTILATION SYSTEMS IN HOUSES FOR FATTENING PIGS

1997 ◽  
Vol 40 (4) ◽  
pp. 1161-1170 ◽  
Author(s):  
A. J. A. Aarnink ◽  
M. J. M. Wagemans
Keyword(s):  
Ammonia Volatilization ◽  
Dust Concentration ◽  
Fattening Pigs ◽  
Ventilation Systems

scholarly journals Influence of different ventilation systems on inhalable and respirable dust particles concentrations distribution in weaning and finishing fattening pig houses

2003 ◽  
Vol 48 (2) ◽  
pp. 187-204
Author(s):  
Goran Topisirovic
Keyword(s):  
Experimental Treatment ◽  
Dust Concentration ◽  
Dust Particles ◽  
Breathing Zone ◽  
Airflow Velocity ◽  
Significant Decrement ◽  
Ventilation Ducts ◽  
Finishing Pig ◽  
Mechanical Extraction ◽  
Ventilation Systems

The application of different mechanical extraction ventilation systems in reducing and controlling dust concentrations in weaned and finishing pig houses was analyzed and discussed in this work. Dust concentrations and airflow velocities have been measured at 20 measuring points, smoothly positioned over the house cross section, in the net consisting of 4 horizontal and 5 vertical rows. The lowest horizontal row was positioned at the pigs breathing zone (40 cm above the floor), and the highest (fourth) horizontal row was positioned at the workers breathing zone (160 cm). Control values were measured in houses with closed doors and windows and all the fans switched off. These values were compared with three experimental sets of values achieved with: floor, roof and both ventilation systems. Dust concentrations were measured by konimeter (Konimeter 10, Karl Zeiss Jena), airflow velocity in ventilation ducts with a turbine anemometer and the airflow velocity at measuring points with hot wire anemometer. In the finishing house significant decrement of inhalable (F = 44.35, P << 0.01) and respirable (F = 43.82, P << 0.01) dust concentration was achieved in the third experimental treatment. In the weaned piglets house, significant decrement of inhalable (F = 49.43, P << 0.01) and respirable (F = 42.69, P << 0.01) dust concentration was achieved with floor ventilation.

scholarly journals Behavior and Welfare of Undocked Heavy Pigs Raised in Buildings with Different Ventilation Systems

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2338
Author(s):  
Marika Vitali ◽  
Enrica Santolini ◽  
Marco Bovo ◽  
Patrizia Tassinari ◽  
Daniele Torreggiani ◽  
...  
Keyword(s):  
Animal Welfare ◽  
Ventilation System ◽  
Affective State ◽  
Live Weight ◽  
Behavioral Measures ◽  
Mechanically Ventilated ◽  
Health Measures ◽  
Positive Affective State ◽  
Fattening Pigs ◽  
Ventilation Systems

The present study aimed to evaluate animal welfare of pigs from the same farm, raised with two ventilation systems. The study involved 60 pens of fattening pigs, raised in two buildings: one naturally ventilated (NV) and the other mechanically ventilated (MV). Pigs were assessed on three observation days: at 40 kg (T1), 100 kg (T2), and 160 kg (T3) of live weight. Animal-based measures were used such as qualitative behavioral analysis (QBA), behavioral measures (BMs), and lesion and health measures (LHMs). Housing conditions (HCs) measured at each observation day were the number of pigs per pen, space allowance, temperature, light, and CO2. The association study was performed using a general linear model and analysis of variance. Ventilation effect was analyzed by performing computational fluid dynamics. Results showed that overall pigs raised in the MV were in a more positive affective state. Despite that, with hot temperatures, the higher occurrence of pig soiling indicated heat stress in pigs and consequent welfare impairment. The higher frequency of pigs showing dog sitting behavior at T2 and T3 suggest welfare worsening in the last phases of fattening. The study concludes that ventilation system influences animal behavior and overall animal welfare, especially during the warmer season.

The influence of nutritional factors on metabolism of growing fattening pigs in conditions of technological stress

2019 ◽  
Vol 332 (9) ◽  
pp. 49-54
Author(s):  
R.V. Nekrasov ◽  
◽  
M.G. Chabaev ◽  
N.V. Bogolyubova ◽  
E.Yu. Tsis ◽  
...  
Keyword(s):  
Nutritional Factors ◽  
Fattening Pigs ◽  
Technological Stress

Experience of using BIM-technologies in design course of heating and ventilation systems

2019 ◽  
Author(s):  
Mariia Sergeevna Rostova ◽  
Elizaveta Albertovna Saifullina ◽  
Inna Ivanovna Sukhanova
Keyword(s):  
Ventilation Systems

Effects of Stilbestrol and Testosterone Pellets Implanted into Growing-Fattening Pigs

1951 ◽  
Vol 10 (4) ◽  
pp. 889-892 ◽  
Author(s):  
H. L. Woehling ◽  
George D. Wilson ◽  
R. H. Grummer ◽  
R. W. Bray ◽  
L. E. Casida
Keyword(s):  
Fattening Pigs
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