Making Cardboard and Paper Recycling More Sustainable: Recycled Paper Sludge For Energy Production and Water-Treatment Applications

Rising socioeconomic level and increasing popularity of e-commerce have dramatically increased the use of cardboard packaging materials, and consequent related recycling and wastes. Large amounts of sludge (up to 40% of input mass) is formed through the recycling process, with sludge solids that are...

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Published inWaste and biomass valorization Vol. 12; no. 3; pp. 1599 - 1608
Main Authors Peretz, Roi, Mamane, Hadas, Wissotzky, Eli, Sterenzon, Elizaveta, Gerchman, Yoram
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.03.2021
Springer Nature B.V
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Summary:Rising socioeconomic level and increasing popularity of e-commerce have dramatically increased the use of cardboard packaging materials, and consequent related recycling and wastes. Large amounts of sludge (up to 40% of input mass) is formed through the recycling process, with sludge solids that are very rich in cellulose fibers (~ 75% w/w). To date this sludge is mostly disposed in landfills, resulting in added economic and environmental costs to the recycling process. Short ozonation pretreatment of RPS resulted in enzymatic release of ~ 34% of the cellulosic fraction of the sludge as sugar, and fermentation of these sugars by yeasts resulted in production of ~ 15 g/L ethanol. The solid remnants, were used as a bio-sorbent, efficiently removing dyes from textile wastewater. Recycled paper sludge waste was thus a good source for both energy and water-treatment applications, increasing sustainability and circular economy in the paper and cardboard recycling industry.
ISSN:1877-2641
1877-265X
DOI:10.1007/s12649-020-01117-y