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Influence of Surfactant on the Hydrolysis of Used Newspaper  

Kim, Sung-Bae (Department of Chemical & Biological Engineering and ERI, Gyeongsang National University)
Shin, Hae-Joong (Department of Chemical & Biological Engineering and ERI, Gyeongsang National University)
Kim, Chang-Joon (Department of Chemical & Biological Engineering and ERI, Gyeongsang National University)
Bak, Young-Cheol (Department of Chemical & Biological Engineering and ERI, Gyeongsang National University)
Publication Information
KSBB Journal / v.22, no.1, 2007 , pp. 43-47 More about this Journal
Abstract
The effect of surfactant on the hydrolysis of used newspaper was investigated. The most suitable surfactant for the pretreatment stage was found to be NP-series surfactants among 9 kinds of non ionic surfactants. Process parameters such as surfactant concentration, mixing speed, pretreatment temperature and time were tested to optimize for maximum digestibility and 0.5%, 100rpm, 30$^{\circ}C$, and 1 h were found to be optimum, respectively. In order to maximize digestibility, substrate was pretreated with NP-20 and then the pretreated substrate was hydrolyzed by adding TW-80. The effect of surfactant on the hydrolysis of previously surfactant-pretreated newspaper was marginal. Therefore, the digestibility with the addition order of enzyme and surfactant was investigated by using surfactant only in hydrolysis stage. The results show that digestibility was more lowered as the surfactant addition after adding enzyme to substrate was more delayed.
Keywords
Newspaper; pretreatment; hydrolysis; surfactant; digestibility;
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Times Cited By KSCI : 1  (Citation Analysis)
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