Effectiveness of multi-stage scrubbers in reducing emissions of air pollutants from pig houses

摘要: Emissions of air pollutants from livestock houses may raise environmental problems and pose hazards to public health. They can be reduced by scrubbers installed at the outlets houses. In this study, three multi-stage were evaluated in terms their effectiveness reducing emissions airborne dust, total bacteria, ammonia, CO2 pig winter. The one double-stage scrubber (acid stage+ bio-filter), stage + bio-scrubber), triple-stage (water acid bio-filter). Results showed that these concentrations PM10 61% 93%, PM2.5 47% 90%, bacteria 46% 85%, ammonia 70% 100%. Concentrations not affected. Most emitted larger than 3.3 µm (73% 95%). removed 53% 92% them, compared with -42% 20% removal size range 0.65 µm. was most efficient removing dust ammonia. Compared single-stage scrubbers, all performed more consistently reduction PM10, PM2.5, efficiently. It should noted measurements winter low ventilation rates, thus loadings scrubbers.