Abstract High ammonia (NH 3) levels (> 25 ppm) in poultry houses reduce the body weight
gain, feed conversion, survival ability, carcass conviction rate, and immune system of birds …

There was an increasing interest in reducing production and emission of air pollutants to
improve air quality for animal feeding operations (AFOs) in the US in the 21st century …

To comprehensively assess conventional vs. some alternative laying-hen housing systems
under US production conditions, a multi-institute and multi-disciplinary project, known as the …

Indoor air pollutants at high concentrations in poultry houses can potentially affect workers'
health, and animal welfare and productivity. This paper presents research results of a 2-year …

Highlights•CFD model was developed for simulating indoor thermal environment of layer
houses.•Model was validated by field measurements in summer, autumn, and winter.•Heat …

Wintertime episodes of high aerosol concentrations occur frequently in urban and
agricultural basins and valleys worldwide. These episodes often arise following …

Ammonia (NH 3) is a major gaseous pollutant in poultry houses and adversely affects
production performance and the health of layers and workers. Knowledge of three …

Higher concentrations of ammonia (NH 3) and carbon dioxide (CO 2) in animal barns can
negatively affect production and health of animals and workers. This paper focuses on …

Air pollutants emitted from confined animal buildings can cause environmental pollution and
ecological damage. Long-term (> 6 months) and continuous (or high frequency) monitoring …

Highlights•Composting buildings of manure-belt poultry houses emit significant ammonia
(NH 3).•Daily and seasonal means of NH 3 concentration and emission factors were …