Correlation of wood-based components and dewatering properties of waste activated sludge from pulp and paper industry

Hanna Kyllönen, J. Lehto, Pentti Pirkonen, Antti Grönroos, H. Pakkanen, Raimo Alén

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

Large amounts of wet sludge are produced annually in municipal and industrial wastewater treatment. Already in pulp and paper industry, more than ten million tons of primary sludge, waste activated sludge, and de-inking sludge is generated. Waste activated sludge contains large quantities of bound water, which is difficult to dewater. Low water content would be a matter of high calorific value in incineration but it also has effects on the volume and the quality of the matter to be handled in sludge disposal. In this research waste activated sludges from different pulp and paper mills were chemically characterised and dewatered. Correlations of chemical composition and dewatering properties were determined using multivariate analysis. Chemical characterisation included basic sludge analysis, elementary analysis and analysis of wood-based components, such as hemicelluloses and lignin-derived material. Dewatering properties were determined using measurements of dry solids content, flux and flocculant dosage. The effects of different variables varied according to the response concerned. The variables which were significant regarding cake DS increase in filtration or centrifugation and flocculant dosage needed in filtration were different from those which were significant regarding flux.
Original languageEnglish
Pages (from-to)387-393
Number of pages7
JournalWater Science and Technology
Volume62
Issue number2
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Fingerprint

pulp and paper industry
Paper and pulp industry
Dewatering
dewatering
activated sludge
Wood
sludge
Sludge disposal
Fluxes
Calorific value
Incineration
Centrifugation
Paper and pulp mills
Sewage sludge
Lignin
Wastewater treatment
Water content
incineration
multivariate analysis
lignin

Keywords

  • characterisation
  • dewatering
  • pulp and paper industry
  • sludge
  • wood-based components

Cite this

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title = "Correlation of wood-based components and dewatering properties of waste activated sludge from pulp and paper industry",
abstract = "Large amounts of wet sludge are produced annually in municipal and industrial wastewater treatment. Already in pulp and paper industry, more than ten million tons of primary sludge, waste activated sludge, and de-inking sludge is generated. Waste activated sludge contains large quantities of bound water, which is difficult to dewater. Low water content would be a matter of high calorific value in incineration but it also has effects on the volume and the quality of the matter to be handled in sludge disposal. In this research waste activated sludges from different pulp and paper mills were chemically characterised and dewatered. Correlations of chemical composition and dewatering properties were determined using multivariate analysis. Chemical characterisation included basic sludge analysis, elementary analysis and analysis of wood-based components, such as hemicelluloses and lignin-derived material. Dewatering properties were determined using measurements of dry solids content, flux and flocculant dosage. The effects of different variables varied according to the response concerned. The variables which were significant regarding cake DS increase in filtration or centrifugation and flocculant dosage needed in filtration were different from those which were significant regarding flux.",
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Correlation of wood-based components and dewatering properties of waste activated sludge from pulp and paper industry. / Kyllönen, Hanna; Lehto, J.; Pirkonen, Pentti; Grönroos, Antti; Pakkanen, H.; Alén, Raimo.

In: Water Science and Technology, Vol. 62, No. 2, 2010, p. 387-393.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Correlation of wood-based components and dewatering properties of waste activated sludge from pulp and paper industry

AU - Kyllönen, Hanna

AU - Lehto, J.

AU - Pirkonen, Pentti

AU - Grönroos, Antti

AU - Pakkanen, H.

AU - Alén, Raimo

PY - 2010

Y1 - 2010

N2 - Large amounts of wet sludge are produced annually in municipal and industrial wastewater treatment. Already in pulp and paper industry, more than ten million tons of primary sludge, waste activated sludge, and de-inking sludge is generated. Waste activated sludge contains large quantities of bound water, which is difficult to dewater. Low water content would be a matter of high calorific value in incineration but it also has effects on the volume and the quality of the matter to be handled in sludge disposal. In this research waste activated sludges from different pulp and paper mills were chemically characterised and dewatered. Correlations of chemical composition and dewatering properties were determined using multivariate analysis. Chemical characterisation included basic sludge analysis, elementary analysis and analysis of wood-based components, such as hemicelluloses and lignin-derived material. Dewatering properties were determined using measurements of dry solids content, flux and flocculant dosage. The effects of different variables varied according to the response concerned. The variables which were significant regarding cake DS increase in filtration or centrifugation and flocculant dosage needed in filtration were different from those which were significant regarding flux.

AB - Large amounts of wet sludge are produced annually in municipal and industrial wastewater treatment. Already in pulp and paper industry, more than ten million tons of primary sludge, waste activated sludge, and de-inking sludge is generated. Waste activated sludge contains large quantities of bound water, which is difficult to dewater. Low water content would be a matter of high calorific value in incineration but it also has effects on the volume and the quality of the matter to be handled in sludge disposal. In this research waste activated sludges from different pulp and paper mills were chemically characterised and dewatered. Correlations of chemical composition and dewatering properties were determined using multivariate analysis. Chemical characterisation included basic sludge analysis, elementary analysis and analysis of wood-based components, such as hemicelluloses and lignin-derived material. Dewatering properties were determined using measurements of dry solids content, flux and flocculant dosage. The effects of different variables varied according to the response concerned. The variables which were significant regarding cake DS increase in filtration or centrifugation and flocculant dosage needed in filtration were different from those which were significant regarding flux.

KW - characterisation

KW - dewatering

KW - pulp and paper industry

KW - sludge

KW - wood-based components

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DO - 10.2166/wst.2010.273

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