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Fermentation and chemical treatment of pulp and paper mill sludge

United States Patent

8,900,457
December 2, 2014
View the Complete Patent at the US Patent & Trademark Office
A method of chemically treating partially de-ashed pulp and/or paper mill sludge to obtain products of value comprising taking a sample of primary sludge from a Kraft paper mill process, partially de-ashing the primary sludge by physical means, and further treating the primary sludge to obtain the products of value, including further treating the resulting sludge and using the resulting sludge as a substrate to produce cellulase in an efficient manner using the resulting sludge as the only carbon source and mixtures of inorganic salts as the primary nitrogen source, and including further treating the resulting sludge and using the resulting sludge to produce ethanol.
Lee; Yoon Y. (Auburn, AL), Wang; Wei (Auburn, AL), Kang; Li (Auburn, AL)
Auburn University (Auburn, AL)
13/ 391,549
20120273413
August 20, 2010
STATEMENT OF GOVERNMENT INTEREST This invention was made with government support under grant number DE-FG36-07G07G01702 awarded by the Department of Energy, and subaward number S-00000307. The Government has certain rights in the invention.