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Removal of dissolved and colloidal substances from mechanical pulping white waters by flotation
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)ORCID iD: 0000-0002-0770-2086
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (Organisk kemi)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (Organisk kemi)
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2011 (English)In: 16th International Symposium on Wood, Fiber and Pulping Chemistry - Proceedings, ISWFPC / [ed] Wang, L. et al., Tianjin: China Light Industry Press , 2011, 1238-1242 p.Conference paper, Published paper (Other academic)
Abstract [en]

Various sorts of process water, foaming agents and a new chelating surfactant have been investigated in the chemical optimization of flotation ofwaters generated at laboratory and white water from mechanical pulping. Turbidity measurements, the Orcinol method for quantitative carbohydrate analysis and total organic carbon (TOC) as well as gas chromatography (GC) of extractives, have been carried out to determine theremoval and characteristics of Dissolved and Colloidal substances (DisCo). The tests have been realized under different conditions, such as using different flotation cells, foaming agents and complexing agents at different temperatures and pH values. It was found that a reduction of thewhite water turbidity of 70% and a 50% removal of the lipophilic substances from the white water can be obtained in a single-stage flotationunit, and that the selection of suitable flotation equipment, foaming agents and solution conditions plays a very important role in the removalcapacity of the unwished substances.

Place, publisher, year, edition, pages
Tianjin: China Light Industry Press , 2011. 1238-1242 p.
Keyword [en]
Complexing agents; Extractives; Flotation; Foaming agents; Separation; White water
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-14654Scopus ID: 2-s2.0-84855712244OAI: oai:DiVA.org:miun-14654DiVA: diva2:452283
Conference
16th International Symposium on Wood, Fiber and Pulping Chemistry, ISWFPC;Tianjin;8 June 2011through10 June 2011;Code88003
Projects
CLEAN
Available from: 2011-10-28 Created: 2011-10-28 Last updated: 2016-12-15Bibliographically approved

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Zasadowski, DariuszAndersson, FredrikEdlund, HåkanAlmesåker, AnnHedenström, ErikNorgren, Magnus
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