A two-cell manure storage system with a cover on the first cell was constructed in the late summer of 2009 in Eastern South Dakota. The covered cell acts as a simple anaerobic digester. Continuous temperature monitoring for 8 months shows the winter effluent temperature equilibrated to around 6°C, and that the effluent temperature trend lagged the ambient temperature trend by a month. Manure composition was also analyzed and was found to be relatively steady throughout the system. Volatile solids were the only component that dropped appreciably across the treatment cell, with an observed maximum of 50% reduction.
Darrington, J. and Cortus, E.
"Long Term, Continuous Temperature Monitoring of a Simple Anaerobic Digester and Open Manure Storage Pond in Eastern South Dakota,"
The Journal of Undergraduate Research: Vol. 9
, Article 4.
Available at: http://openprairie.sdstate.edu/jur/vol9/iss1/4