NH3 EMISSIONS AND N–BALANCES FOR A 1.6 MILLION CAGED LAYER FACILITY: MANURE BELT/COMPOSTING VS. DEEP PIT OPERATION

摘要: NH3 levels and resulting emissions during the handling of manure within animal–production facilities have significant health, safety, odor–generation, environmental impacts. Aerial concentrations ammonia were measured in air leaving downwind a 1.6 million caged layer poultry facility using two types management: belt/composting deep pit. In addition, N–balances done controlled volume approach based on N/ash ratios. Results showed clear advantages belt/composting over conventional deep–pit systems, with N retention in compost of 0.559 kg bird–1 yr–1 versus 0.265 manure. even high leaving the composting building (90 160 ppm), 24–hour average atmospheric less than 0.61 ppm beyond 152 m, total half that systems. Data are presented terms source concentrations emission rates. The practices associated housing systems studied outlined as background material.