Influence of cation leaching on water retentivity of drinking water sludge

Y. Watanabe, H. Komine

Research output: Contribution to conferencePaper

Abstract

Drinking water sludge (DWS) is discharged during water purification. It is presently classified as industrial waste. To use DWS in geotechnical works safely, it is important to focus on changeable water retention of DWS. This study investigated the influence of cation leaching to water retentivity of DWS. Cation leaching was simulated using column leaching tests. As a result, the water retentivity of DWS decreased after cation leaching. It was discussed that the hydrophilic part of flocculating agent used in water purification process was deformed by interaction with water and leached as Al. One calculation result showed that the change of water retention of DWS occurred around 7 years from the utilization. Therefore, it is beneficial to monitor the geotechnical utilization of DWS from the viewpoint of changeable water retentivity.

Original languageEnglish
Publication statusPublished - 2011 Dec 1
Externally publishedYes
Event14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011 - Hong Kong, China
Duration: 2011 May 232011 May 27

Conference

Conference14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011
CountryChina
CityHong Kong
Period11/5/2311/5/27

ASJC Scopus subject areas

  • Soil Science
  • Geotechnical Engineering and Engineering Geology

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    Watanabe, Y., & Komine, H. (2011). Influence of cation leaching on water retentivity of drinking water sludge. Paper presented at 14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011, Hong Kong, China.