EKOLOGICAL STUDY OF CO2 EMISSIONS IN TWO TYPES OF INDUSTRIAL BUILDINGS FOR DAIRY COWS | Екологично проучване за CO2 емисиите в два типа производствени сгради за дойни крави
2012
Krastev, K., Institute of Animal Science, Kostinbrod (Bulgaria)
Two types of buildings are investigated. One of them is a monolithic building of 100 dairy cows, arranged in two rows of 50. Crib is against each other with nutritional path between them. There is natural ventilation and manure cleaning is done by plank-chain conveyor. Another is a panel building for 200 dairy cows located in 4 rows of 50. Inside there is a mechanical ventilation by installed axial fans on the two longitudinal walls. Cleaning of the fertilizer is done by water and excrement collected in the channel beneath grate beds of dairy cows. Highest concentration of carbon dioxide is measured in winter. Its average value is 1600 ppm in the monolithic building, but in the panel building is 1200 ppm. In summer concentration of CO2 emission is the lowest. Its average value is 1000 ppm in the monolithic building but in the panel building is 700 ppm. The concentration of CO2 is highest at 5 am in winter in the both types of buildings. Its average value is 2300 ppm in the solid building but in the panel building is 2100 ppm. The data shows that the established content of CO2 emission in both types of buildings is at lower levels of zoo-hygiene norms - 3000 ppm.
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