Polluted lignocellulose-bearing sediments as a resource for marketable goods—a review of potential technologies for biochemical and thermochemical processing and remediation
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Published:2021-07-02
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Volume:
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ISSN:1618-954X
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Container-title:Clean Technologies and Environmental Policy
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language:en
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Short-container-title:Clean Techn Environ Policy
Author:
Haller HenrikORCID, Paladino Gabriela, Dupaul Gabriel, Gamage Shiromini, Hadzhaoglu Burdzhu, Norström Sara, Eivazi Alireza, Holm Svante, Hedenström Erik, Jonsson Anders
Abstract
AbstractLignocellulose-bearing sediments are legacies of the previously unregulated wastewater discharge from the pulp and paper industry, causing large quantities of toxic organic waste on the Baltic Sea floor and on the bottom of rivers and lakes. Several km2 are covered with deposits of lignocellulosic residues, typically heavily contaminated with complex mixtures of organic and inorganic pollutants, posing a serious threat to human and ecological health. The high toxicity and the large volume of the polluted material are challenges for remediation endeavours. The lignocellulosic material is also a considerable bioresource with a high energy density, and due to its quantity, it could appeal to commercialization as feedstock for various marketable goods. This study sets out to explore the potential of using this polluted material as a resource for industrial production at the same time as it is detoxified. Information about modern production methods for lignocellulosic material that can be adapted to a polluted feedstock is reviewed. Biochemical methods such as composting, anaerobic digestion, as well as, thermochemical methods, for instance, HTC, HTL, pyrolysis, gasification and torrefaction have been assessed. Potential products from lignocellulose-bearing sediment material include biochar, liquid and gaseous biofuels, growing substrate. The use of a contaminated feedstock may make the process more expensive, but the suggested methods should be seen as an alternative to remediation methods that only involve costs. Several experiments were highlighted that support the conception that combined remediation and generation of marketable goods may be an appropriate way to address polluted lignocellulose-bearing sediments.
Graphic abstract
Funder
Mid Sweden University
Publisher
Springer Science and Business Media LLC
Subject
Management, Monitoring, Policy and Law,Environmental Chemistry,Environmental Engineering,General Business, Management and Accounting,Economics and Econometrics
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