Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Low-temperature drying of industrial biosludge with simulated secondary heat
Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology, Division of Biomass Technology and Chemistry, SE- 90183 Umeå, Sweden.
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2017 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 116, 792-798 p.Article in journal (Refereed) Published
Abstract [en]

Drying is an energy-intensive unit operation and future sludge dryers should be able to take advantage of the secondary energy of industrial environments. This work reports the use of a pilot cyclone for drying biosludge at low temperatures and simulating the use of secondary waste heat. The pilot-scale experiments were performed according to an experimental design and the results interpreted using principal components and multiple linear regression. The dry solids content of processed sludge increased from 9 to 19-68% during the experiments with a predicted energy consumption of <1.7 kWh kri H2O. However, the combined energy consumption was 80-230% higher indicating that the efficiency of sludge drying was governed by the availability of secondary heat. Drying sludge to solid contents sustainable for fossil fuel replacement at pulp and paper mills could be performed with secondary heat at a temperature of 70 degrees C, a pilot-scale feeding capacity of 170 kg h(-1) and a corresponding energy consumption of 1.0 kWh kg(-1) H2O. The results suggest that the use cyclones could be an efficient option for future sludge drying at pulp and paper mills.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2017. Vol. 116, 792-798 p.
Keyword [en]
Biosolids, Convective drying, Process integration, Regression modelling, Response surface methodology, Waste heat
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:umu:diva-134213DOI: 10.1016/j.applthermaleng.2017.02.010ISI: 000397550300067OAI: oai:DiVA.org:umu-134213DiVA: diva2:1110902
Available from: 2017-06-16 Created: 2017-06-16 Last updated: 2017-06-16Bibliographically approved

Open Access in DiVA

fulltext(1741 kB)34 downloads
File information
File name FULLTEXT01.pdfFile size 1741 kBChecksum SHA-512
211c4b7ac7aa997a3b45c56a11e6c804756d27aec65550cf157e6a1d01e85906ca72cf34126621712761da1e53830362e074bd3c6566064c91581a86b0ec5328
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Geladi, Paul
By organisation
Department of Applied Physics and Electronics
In the same journal
Applied Thermal Engineering
Energy Systems

Search outside of DiVA

GoogleGoogle Scholar
Total: 34 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 42 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf