Manure management tasks such as pulling pit-drain plugs put workers at risk of hydrogen sulphide exposure. In order to reduce the production of hydrogen sulphide, an in-barn manure handling system that provides more frequent and complete removal of manure from production rooms was investigated. Gas levels were compared in two grow-finish rooms; one with a manure scraper and the other with the conventional pit-plug system. The scraper room had 90% lower hydrogen sulphide concentrations. Ammonia emissions were not affected. The cost of installing this technology is around $2-3 per pig though worker safety has many benefits as well.
Manure Scraper System Reduces Hydrogen Sulphide Levels in Swine Barns (full article)
