Anaerobic digestion of municipal solid waste |
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Authors: | Rivard C J Rodriguez J B Nagle N J Self J R Kay B D Soltanpour P N Nieves R A |
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Institution: | 1.Alternative Fuels Division, National Renewable Energy Laboratory, 80401, Golden, CO ;2.Department of Agromony, Colorado State University, 80523, Fort Collins, CO ; |
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Abstract: | Tuna processing wastes (sludges high in fat, oil, and grease FOG]) and municipal solid waste (MSW) generated on Tutuila Island,
American Samoa, represent an ongoing disposal challenge. The biological conversion of the organic fraction of these wastes
to useful products, including methane and fertilizer-grade residue, through anaerobic high-solids digestion is currently in
scale-up development. The suitability of the anaerobic digestion residues as a soil amendment was evaluated through extensive
chemical analysis and greenhouse studies using corn as an indicator crop. Additionally, native Samoan soil was used to evaluate
the specific application rates for the compost. Experiments established that anaerobic residues increase crop yields in direct
proportion to increases in the application rate. Additionally, nutrient saturation was not demonstrated within the range of
application rates evaluated for the Samoan soil. Beyond nutrient supplementation, organic residue amendment to Samoan soil
imparts enhanced water- and nutrient-binding capacities. |
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Keywords: | Index Entries" target="_blank">Index Entries Anaerobic digestion tuna sludge MSW high solids compost |
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