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Improving the Value of Anaerobic Digestion Through Integration of Ammonia Recovery, Biomethane Production and Lignocellulosic Pretreatment

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

Citation:  Paper number  131618647,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: http://dx.doi.org/10.13031/aim.20131618647) @2013
Authors:   Dennis A Burke
Keywords:   Anaerobic Digestion substrate pretreatment ammonia recovery ammonium bicarbonate fertilizer biogas cleanup biomethane

Abstract. Anaerobic Digestion (AD) reduces the odor of waste, substantially reduces methane Green House Gas (GHG) emissions while producing renewable energy. However, AD substantially increases fugitive ammonia emissions from digestate storage, NOx emissions from power generation, while producing a low quality gas with poor economic benefits. This paper describes an alternative process configuration that doubles or triples AD income without increasing the capital and operating costs. Inexpensive pretreatment, ammonia reclamation, and biomethane production technologies are presented.

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