Biosolids and livestock manure are valuable high-carbon soil amendments, but they commonly contain antibiotic residues that might persist after land application. While composting reduces the concentration of extractable antibiotics in these materials, if the starting concentration is sufficiently high then remaining residues could impact microbial communities in the compost and soil to which these materials are applied.…
Composted Horse Manure and Stall Bedding Pilot Project
Why Study Compost as Bedding for Horses?
The purpose of this project was to study and promote the use of compost as an alternative horse stall bedding and encourage horse owners and managers to think more creatively about manure management. Our objective was to reduce bedding use, and improve manure management practices at equine facilities in Snohomish County, Washington State.…
Sustainable Dairy Production Housing / Manure System: Compost Bedded Loose Housing Dairy Barn
What Are Compost Bedded Dairy Barns?
In the U.S., the first compost bedded loose housing (CBP) dairy barns were developed by Virginia dairy producers in the 1980’s to increase cow comfort and longevity. The key component of a CBP dairy barn is a large, open resting area generally bedded with sawdust or dry, fine wood shavings that is tilled to support aerobic composting.…
Horse Manure Composting: Facilities and Methods
Managing horse manure may involve mechanical equipment, physical labor and conveying of manure. It is generally practiced outdoors in all types of weather. Composting is the aerobic decomposition of organic materials by microorganisms under controlled conditions. Microorganisms consume oxygen while feeding on organic matter and as a result, give off heat and CO2.…