PHYSICAL, CHEMICAL AND MECHANICAL PROPERTIES OF DREDGED SLUDGE AND EFFECT OF DESICCATION ON THE PROPERTIES

• TAKISAWA Tomoaki

  Graduate School of Environmental Science, Okayama University

• MURAKAMI Akira

  Graduate School of Environmental Science, Okayama University

• NISHIMURA Shin’ichi

  Graduate School of Environmental Science, Okayama University

Abstract

  This paper examines the relationship between physical, chemical and mechanical properties and effect of the desiccation of dredged sludge. The characteristics of dredged sludge with high water content can be improved by various methods, i.e., solidification with stabilizing materials, mechanical dehydration, desiccation and stabilization by heat. The physical and chemical properties were investigated using consistency tests, ignition loss (Li) tests, pH tests, XRF analyses and X-ray diffraction analyses. The mechanical properties were measured by standard consolidation and permeability tests. The experimental results indicate that 1) desiccation can dramatically reduce the liquid limit of sludge and 2) the reduction rate of the compression indices between the original wet materials and the desiccated materials is proportional to the ignition loss of the materials when Li exceeds 12%.

Journal

• Journal of Environmental Science for Sustainable Society

  Journal of Environmental Science for Sustainable Society 1 61-66, 2007

  Graduate School of Environmental and Life Science, Okayama University

Keywords

• Dredged sludge
• Desiccation
• Ignition loss

Details

• CRID: 1390001205275168128
• NII Article ID: 130004487659
• DOI: 10.3107/jesss.1.61
• ISSN: 18815073
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed