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Determination of relative solids concentration in homogeneous dual component pulp-filler suspension by multi-spectrophotometer
University of Oulu, Oulu, Finland.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. KTH, Stockholm.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.ORCID iD: 0000-0003-3381-5516
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2020 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 35, no 1, p. 71-77Article in journal (Refereed) Published
Abstract [en]

The concentration of fibers and fillers in the pulp suspension is an important parameter in the monitoring process. This paper proposes a versatile optical measurement system to estimate the concentration of a solids mixture in water. The geometry used in a multi-spectrophotometer (MSM) enables the controlled observation of transmission, and forward scattering light from the suspension in the UV-visible spectral range. We have developed the new fibers mixing system which gives a homogenous distribution of the fines and fillers making it possible to increase the reproducibility and accuracy of the measurement. The data analysis is based on the Beer-Lambert law and CIELAB color space equations. The results show that the proposed method is accurate for measuring the fines and filler concentrations in multicomponent suspensions. 

Place, publisher, year, edition, pages
2020. Vol. 35, no 1, p. 71-77
Keywords [en]
Color, Fillers, Forward scattering, Meteorological instruments, Optical data processing, Spectrophotometers, Absorption co-efficient, Beer Lambert law, Filler concentration, fines, Monitoring process, Optical measurement systems, Reproducibilities, Solids concentrations, Suspensions (fluids)
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:miun:diva-38488DOI: 10.1515/npprj-2018-0058ISI: 000518380700008Scopus ID: 2-s2.0-85079054151OAI: oai:DiVA.org:miun-38488DiVA, id: diva2:1395298
Available from: 2020-02-21 Created: 2020-02-21 Last updated: 2020-03-26Bibliographically approved

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Forsberg, VivianeZakrisson, DanielEngberg, Birgitta A.Thungström, Göran

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