Energy and protein production from pulp mill wastes. Progress report, June 15, 1977--September 15, 1977

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Experiments conducted during this past quarter demonstrated the decided difference both in amount and composition of the gas produced from the fermentation of ozonated versus unozonated yeast-plant SSL. Gas from ozonated SSL averaged over 80% methane content while unozonated effluent was mostly carbon dioxide. Gas production rates and retention time studies indicated that the fermentation was substrate-limited. Preliminary tests using supplemental carbon sources have verified this. The success of the ozonation process in producing fermentable substrates was clearly shown by the appreciable yeast growth in the ozonated SSL. Of particular significance was the maximum yield obtained at the short ozonation … continued below

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9 pages

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Jurgensen, M. F. & Patton, J. T. September 15, 1977.

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Experiments conducted during this past quarter demonstrated the decided difference both in amount and composition of the gas produced from the fermentation of ozonated versus unozonated yeast-plant SSL. Gas from ozonated SSL averaged over 80% methane content while unozonated effluent was mostly carbon dioxide. Gas production rates and retention time studies indicated that the fermentation was substrate-limited. Preliminary tests using supplemental carbon sources have verified this. The success of the ozonation process in producing fermentable substrates was clearly shown by the appreciable yeast growth in the ozonated SSL. Of particular significance was the maximum yield obtained at the short ozonation time of 10 minutes as compared to the 2-hour treatment. It is possible that shortening the ozonation time could also increase the amount of substrate available for methane production. This would be very important in transferring this process to a commercial basis and reducing the operating costs.

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9 pages

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Dep. NTIS, PC A02/MF A01.

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  • September 15, 1977

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  • Jan. 22, 2018, 7:23 a.m.

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  • July 21, 2020, 11:56 a.m.

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Jurgensen, M. F. & Patton, J. T. Energy and protein production from pulp mill wastes. Progress report, June 15, 1977--September 15, 1977, report, September 15, 1977; United States. (https://digital.library.unt.edu/ark:/67531/metadc1055551/: accessed May 29, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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