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Use of dilatometric and drying techniques for assessing sludge dewatering characteristics

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Various methods have been used to characterize the water distribution present in waste sludge samples. This study investigated constant temperature (35°C) drying and dilatometric techniques for quantifying the bound water content of sludges. Preference was stated for the use of dilatometric methods. Bound water content decreased following polymer or freeze-thaw conditioning of waste chemical and biological sludges. Also, mechanical dewatering produced a significant decrease in bound water content and corresponding increase in dewatered cake solids concentration. Interstitial water was found to have a key role in defining dewatered cake solids concentrations.

Keywords: analysis; bound water; conditioning; dewatering; dilatometry; drying; sludge

Document Type: Research Article


Publication date: 1992-01-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research� (WER�) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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