Recovery of biomass cellulose from waste sewage sludge |
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Authors: | Shun'ichi Honda Naoyuki Miyata Keisuke Iwahori |
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Institution: | (1) Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan, JP;(2) Institute for Environmental Sciences, University of Shizuoka, 52-1 Yada, Shizuoka 422-8526, Japan Tel. +81-54-264-5659; Fax +81-54-264-5549 e-mail: iwahori@sea.u-shizuoka-ken.ac.jp, JP |
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Abstract: | In our previous work, the primary sludge from wastewater treatment plants was shown to contain a considerable amount of cellulose
(about 20%, based on suspended solids) owing to the discharge of toilet paper. For the purpose of using the cellulose as a
biomass resource, this study examined a simple method for its recovery. When fibrous cellulose was suspended in 0.3% sulfuric
acid and autoclaved at 130°C for 60 min, 85%–88% of the initial solids remained without dissolving. Under these conditions,
an activated sludge sample not containing cellulose was strongly hydrolyzed and only 7% of the initial solids remained. The
prescribed amounts of cellulose added to the activated sludge sample were quantitatively recovered by the autoclaving treatment.
In the treatment of primary sludge containing >20% cellulose, residual solids with relatively high levels of cellulose (>69%)
could be obtained. The results indicate that the method proposed here could recover cellulose practically from waste sewage
sludge for biomass utilization.
Received: July 17, 2000 / Accepted: July 4, 2001 |
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Keywords: | Cellulose Biomass Recovery resources Autoclaving Waste sewage sludge |
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