The Environmental Impact of Pig Farming
This study aimed to develop a methodology to evaluate the protection of animals and people from the harmful effects of the farm’s microclimate and environment, taking into consideration the energy, economic and environmental indicators. To achieve this goal, the following were determined for 2019 for the eight countries which are the world leaders in the field of pig farming: the volumes of carbon dioxide pollution, ammonia, dust and manure, and the analytical dependencies between the feed consumption, pig productivity and the concentration of ammonia inside the farm. The weight gain of pigs reduced by 15% with an increase in the concentration of ammonia in the internal air of livestock houses to 20 mg/m3 , but the feed wastage increased by 12%. Mathematical models were developed to estimate the relationships between the feed consumption, pig productivity and the concentration of harmful gas (ammonia) which is one of the main parameters of the microclimate. The results will be used in making technical and technological decisions in the field of microclimate, cleaning and disposal of farm manure.
Keywords: pig, farming, ecology, environment
 Samarin, G. N. (2008). Habitat Management of Farm Animals and Birds: Monograph. Velikie Luki: FGOU VPO Velikolukskaya State Agricultural Academy.
 Samarin, G. N., et al. (2018). Optimization of Microclimate Parameters Inside Livestock. Buildings. Intelligent Computing & Optimization (Advances in Intelligent Systems and Computing) (vol. 866). Cham: Springer.
 Novitsky, I. (2016). Industrial Pig Breeding and the Environment. Agricultural Portal. Pig Breeding, vol. 1 pp. 14-31
 Aguirre-Villegas, H. A. and Larson, R. A. (2017). Evaluating Greenhouse Gas Emissions from Dairy Manure Management Practices using Survey Data and Lifecycle Tools. Journal of Cleaner Production, vol. 143, pp. 169-179.
 Cobuloglu, H. I. and Bueyuektahtakin, I. E. (2015). Food vs. Biofuel: An Optimization Approach to the Spatio-Temporal Analysis of Land-Use Competition and Environmental Impacts. Applied Energy, vol. 140, pp. 418-434.
 Divyalakshmi, D., et al. (2017). Assessment of Microclimate and Gaseous Pollutants in Dairy and Pig Sheds in an Organized Farm. Indian Journal of Animal Sciences, vol. 87, issue 6, pp. 93-96.
 Frutos, O. D., et al. (2015). Simultaneous Biological Nitrous Oxide Abatement and Wastewater Treatment in a Denitrifying Off-Gas Bioscrubber. Chemical Engineering Journal, vol. 288, pp. 28-37.
 Kaufmann, T. (2015). Sustainable Livestock Production: Low Emission Farm. The Innovative Combination of Nutrient, Emission and Waste Management with Special Emphasis on Chinese Pig Production. Animal Nutrition, vol. 1, issue 3, pp. 104-112.
 Liu, F., et al. (2017). Bioscrubber Treatment of Exhaust Air from Intensive Pig Production: Case Study in Northern Germany at Mild Climate Condition. Engineering in Life Sciences, vol. 17, issue 4, pp. 458-466.
 Loyon, L., et al. (2016). Best Available Technology for European Livestock Farms: Availability, Effectiveness and Uptake. Journal of Environmental Management, vol. 166, pp. 1-11
 Loyon, L., et al. (2016). Assessment of NH3 reduction and N2O Production during Treatment of Exhausted Air from Fattening Pigs Building by a Commercial Scrubber. Agricultural Sciences, vol. 7, issue 10, pp. 693-709.
 Purdy, A., et al. (2018). Towards Sustainable Farming: Feasibility Study into Energy Recovery from Bio-Waste on a Small-Scale Dairy Farm. Journal of Cleaner Production, vol. 174, pp. 899-904.
 Lewis, N. S., et al. (2016). The Global Antigenic Diversity of Swine Influenza A Viruses Group. Elife, vol. 5, p. e12217
 Wenke, C., et al. (2018). Impact of Different Supply Air and Recirculating Air Filtration Systems on Stable Climate, Animal Health, and Performance of Fattening Pigs in a Commercial Pig Farm. Plos One, vol. 13, p. 3.
 Zakharov, A. A. (1986). Application of Heat in Agriculture. Moscow: Agropromizdat.
 Prokopenko, A. A. (1997). Scientific Justification and Development of Technology for the use of Optical Radiation to Combat Harmful Aerosols in Industrial Poultry Farming. (Dissertation for a Doctorate in Veterinary Sciences, All-Russian Research Institute of Veterinary Sanitation, Hygiene and Ecology, 1997).
 Georgievsky, V. I. (1990). Physiology of Farm Animals. Moscow: Agropromizdat.
 Onegov, A. P., Hrabutovskij, I. F. and CHernyh, V. I. (1984). Hygiene of Farm Animals. Moscow: Kolos.
 Afanasiev, V. N., et al. (2005). Practical Guide for Agricultural Enterprises on Environmental Protection. St. Petersburg: NWNIIMESH.
 Bava, L., et al. (2017). Environmental Impact of the Typical Heavy Pig Production in Italy. Journal of Cleaner Production, vol. 140, pp. 685-691.
 Calsamiglia, S., et al. (2018). A Stochastic Dynamic Model of a Dairy Farm to Evaluate the Technical and Economic Performance under Different Scenarios. Journal of Dairy Science, vol. 101, issue 8, pp. 7517-7530.
 Cowley, F. C., et al. (2015). Immediate and Residual Effects of Heat Stress and Restricted Intake on Milk Protein and Casein Composition and Energy Metabolism. Journal of Dairy Science, vol. 98, issue 4, pp. 2356-2368.
 Das, R., et al. (2016). Impact of Heat Stress on Health and Performance of Dairy Animals: A Review. Veterinary World, vol. 9, issue 3, pp. 260-268.
 Dumont, E. (2018). Impact of the Treatment of NH3 Emissions from Pig Farms on Greenhouse Gas Emissions. Quantitative Assessment from the Literature Data. NEW Biotechnology, vol. 46, pp. 31-37.
 Ferreira, J. B., et al. (2018). Influence of Microclimate Conditions on the Cumulative Exposure of Nursery Pigs to Swine Influenza A Viruses. Transboundary and Emerging Diseases, vol. 65, issue 1, pp. e145- e154.
 Gernand, E., Konig, S. and Kipp, C. (2019). Influence of On-Farm Measurements for Heat Stress Indicators on Dairy Cow Productivity, Female Fertility, and Health. Journal of Dairy Science, vol. 102, issue 7, pp. 6660-6671.
 Kino, E., et al. (2019). Exploration of Factors Determining Milk Production by Holstein Cows Raised on a Dairy Farm in a Temperate Climate Area. Tropical Animal Health and Production, vol. 51, issue 3, pp. 529-536.
 Mellado, M., et al. (2016). Climatic Conditions, Twining and Frequency of Milking as Factors Affecting the Risk of Fetal Losses in High-Yielding Holstein Cows in a Hot Environment. Tropical Animal Health and Production, vol. 48, issue 6, pp. 1247-1252.