Technical Abstract: Odor and air emissions released by some commercial, large swine operations can be a nuisance. Research has shown that some swine confinement buildings can emit significant amounts of odors, hydrogen sulfide (H2S) and other gases, especially from deep pit buildings with long-term manure storage. A monitoring test conducted in a swine barn with a flush system in Northwest Missouri showed odor concentration increased to approximately three times higher than the baseline concentration when flushing occurred. Practical and cost-effective mitigation for odor and air emission is needed. Effectiveness of a scraper system was evaluated at commercial tunnel-ventilated swine barns in Northwest Missouri, where odor concentrations of a scraper barn were 76% lower than flush barns. Scraper system can be a practical alternative for the control of odor emitted from tunnel-ventilated swine barns. Another reason to consider a scraper system is to collect manure more frequently for biogas production (anaerobic digestion). The scraper system can be incorporated into flushing or shallow-pit barns, or for new construction. For existing deep-pit or flushing barns of 1000-head capacity, such a scraper system can be adapted or retrofitted as well. The cost of installing a scraper system in an existing 1000-head finisher building is about $7,200, and the time spent on maintenance of the system is estimated at 3 hours per week. Assuming the two scraper systems operate 12 times/day each, with an electricity rate of $0.08/kW-hr, the electricity consumption of the scraper system is $8.20/month per barn.