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Thermal drying of wastewater sludge: Change in drying area owing to volume shrinkage and crack development

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Abstract

The drying of wastewater sludge with or without an artificial crack was monitored using an electronic balance and an X-ray micro-computerized tomography scanner (micro-CT). The drying rates for sludge cake without a crack was 50-60% of pure water test. With an artificial crack of triangular cross section whose orientation was parallel to (P-type) or normal to (N-type) the air flow, their peak drying rates would be higher than that of cake without a crack. Also, the drying rate of sludge cake with P-type crack was higher than that with N-type crack, being attributable to the additional surface yielded by artificial crack. Using the total surface area as a basis, the effective drying fluxes from sludge cake were noted to close to the water drying test. Copyright © 2005 Taylor & Francis, Inc.
Original languageEnglish
Pages (from-to)669-682
JournalDrying Technology
Volume23
Issue number3
DOIs
Publication statusPublished - 2005
Externally publishedYes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Research Keywords

  • Crack
  • CT
  • Drying
  • Fluxes

Policy Impact

  • Cited in Policy Documents

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