Pilot‐Scale Distillery Spentwash Biomethanation
Publication: Journal of Environmental Engineering
Volume 116, Issue 6
Abstract
Mesophilic biomethanation of distillery spentwash has been investigated at a pilot scale with a diphasic anaerobic process. An operational strategy to suppress sulfide inhibition through pH control in the methane phase has also been validated. The acid phase has been operated on lime‐neutralized spentwash at an organic loading rate of Methane phase operation without solids recycling enabled 65% COD reduction and of biogas production with 60% methane per kilogram COD utilized at an organic loading rate of The contact methane phase at and 27 day mean cell‐residence time achieved 70% COD reduction and gas production with 70% methane per kilogram of COD utilized. An energy audit revealed over 13 times the energy production per unit energy consumed in the process. A mathematical model for the acid phase predicted volatile acid concentrations within 15% of experimental results. The methane phase model incorporated inhibition and was independent of growth or nongrowth associated phenomena. The model predicted effluent substrate concentrations and gas yields within 10% and 15% of experimental values in the methane phase, respectively.
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Information & Authors
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Published In
Journal of Environmental Engineering
Volume 116 • Issue 6 • October 1990
Pages: 1029 - 1045
Copyright
Copyright © 1990 ASCE.
History
Published online: Oct 1, 1990
Published in print: Oct 1990
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