Ecological Study of H2 SEmissions in Two Types of Industrial Buildings for Cows

Abstract

Two types of buildings are investigated. One of them is a monolithic building of 100 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 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 cows. Highest concentration of H2 S is measured in summer. Its average value is 9 mg/m3 in the panel building. In winter concentration of H2 S emission is the 3–5 mg/m3. Its average value is none in the monolithic building but in the panel building is 4 mg/m3. The concentration of H2 S is highest at 5. The data shows that the established content of H2 S emission in both types of buildings is at lower levels of zoo-hygiene norms (10 mg/m3).