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Options for Post Digestion Management of Effluent and Solids

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Bioenergy Engineering, 11-14 October 2009, Bellevue, Washington  BIO-097993.(doi:10.13031/2013.28872)
Authors:   Bernard B Sheff, Theodore M VanAken
Keywords:   Biogas, Manure Solids, Bedding, Composting

As anaerobic digestion in the dairy industry becomes better understood as an accepted primary method for manure management, the treatment of the effluent and the associated solids has become a significant issue. The management of effluent and solids at two dairies, a 1,000 head facility in western Washington (Farm A) and a 12,000 head facility in Indiana (Farm B) are discussed. Both facilities utilize plug flow type digestion for primary treatment of the manure, one a flush facility bedding cows on sand and then selling the digested and aerobically composted manure solids for bedding off-site and one a scrape facility bedding on sand.

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