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Simulation of Anaerobic/Facultative Lagoon Performance Using a 1,000 Liter Pilot Facility

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

Citation:  Paper number  034155,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13897) @2003
Authors:   Douglas W. Hamilton, Ivan N. Kourtchev, Pius M. Ndegwa, Hector J. Cumba, Fabrizio Gioelli
Keywords:   Lagoon, Simulation, Manure, Biological Treatment, Pilot Facility, Carbon Emissions

For the last five years, researchers at Oklahoma State University (OSU) have successfully operated a pilot bioreactor consisting of 4, 270 liter columns that recreate the exact environmental conditions experienced by anaerobic/facultative lagoons. Design and construction of the pilot facility was reported in ASAE Paper 98-4112. In August 1998, the pilot facility was inoculated with effluent and sludge from the OSU Swine Center lagoon, and programmed to repeat heating and lighting patterns experienced by a lagoon under late-summer conditions at 35o N latitude in Oklahoma. An air-conditioning/wind-tunnel system was added to simulate lagoon atmospheric interactions. The atmospheric interaction sub-system became fully functional in 2001. The bioreactors have responded to environmental conditions similar full-sized lagoons as measured by pH and electric conductivity. Methane and Carbon dioxide emissions were measured at 190-280 kg/ha-day and 350-530 kg/haday, respectively. Measured carbon emissions account for 82% of the applied chemical oxygen demand, and respond in a predictable pattern to liquid VFA concentrations.

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