Enzymatic Digestibility of Used Newspaper Treated with Aqueous Ammonia-Hydrogen Peroxide Solution

Chapter
Part of the Applied Biochemistry and Biotechnology book series (ABAB)

Abstract

Wastepaper constitutes approximately half of municipal solid waste, making it a potential source of bioenergy. Newspaper was pretreated with an ammonia-hydrogen peroxide (H2O2) mixture in a shaking bath from room temperature to 80°C, and then its enzymatic digestibility was measured. A significant amount of ink was removed from the newspaper slurry by the reciprocating movement of the shaking bath. In addition, the ammonia-H2O2 significantly swelled the substrate, thereby greatly increasing its susceptibility to enzymatic digestion. After pretreating the newspaper with conditions of 40°C, 3 h, 130 strokes/min, and 4 wt% ammonia-2 wt% H2O2, the enzymatic digestibility was almost 90% of theoretical, or about 25% higher than that of untreated substrate. Digestibility was also investigated as a function of ammonia concentration, H2O2 concentration, shaking speed, pretreatment temperature, and time.

Index Entries

Pretreatment newspaper ammonia hydrogen peroxide enzymatic digestibility 

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Copyright information

© Springer Science+Business Media New York 2003

Authors and Affiliations

  1. 1.Division of Applied Chemical Engineering and ERIGyeongsang National UniversityJinjuKorea

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