Сarbon dioxide emission from cattle manure removed by scrapers
2017
Vtoryi, V., Institute for Engineering and Environmental Problems in Agricultural Production - IEEP, Tyarlevo, Pushkinsky distr., St. Petersburg (Russian Federation) | Vtoryi, S., Institute for Engineering and Environmental Problems in Agricultural Production - IEEP, Tyarlevo, Pushkinsky distr., St. Petersburg (Russian Federation) | Gordeev, V., Institute for Engineering and Environmental Problems in Agricultural Production - IEEP, Tyarlevo, Pushkinsky distr., St. Petersburg (Russian Federation) | Lantsova, E., Institute for Engineering and Environmental Problems in Agricultural Production - IEEP, Tyarlevo, Pushkinsky distr., St. Petersburg (Russian Federation)
Prolonged exposure of human and animal organisms to carbon dioxide can cause chronic poisoning, various diseases, and reduction in productivity. The normative permitted content of carbon dioxide in the indoor air of cattle premises is 0.25 %. Carbon dioxide emission from cattle manure when removed by a scraper-chain conveyor was studied in a typical barn for 200 head with the tied housing system, natural ventilation and 11 t• dE-1 manure output. The study included continuous measurements of carbon dioxide concentration before, during and after manure removal. In the experiment, CO2 concentration was measured just above the manure canal and in the opposite ends of the barn – near the milk collecting unit and manure accumulation tank with the un loading conveyor. For study purposes IEEP designed a mobile unit for microclimate monitoring. The study revealed that during manure removal, which lasted for 15-17 minutes, the CO2 concentration increased 1.3 to 1.5 times in different parts of the barn. When manure removal was completed, the concentration of carbon dioxide decreased and after 6 to 10 minutes, returned to initial values. This short-term increase in CO2 concentration, even in case the permissible values were slightly exceeded, was not dangerous for the animal care personnel and had no adverse effect on animals and their productivity. The study revealed the dependences of CO2 emissions; relevant mathematical models were created.
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