Sludge treatment studies

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Solid formation in filtered leachates and wash solutions was seen in five of the six sludges treated by Enhanced Sludge Washing. Solid formation in process solutions takes a variety of forms: very fine particles, larger particulate solids, solids floating in solution like egg whites, gels, crystals, and coatings on sample containers. A gel-like material that formed in a filtered leachate from Enhanced Sludge Washing of Hanford T-104 sludge was identified as natrophosphate, Na{sub 7}(PO{sub 4}){sub 2}F{center_dot}19H{sub 2}O. A particulate material that formed in a filtered caustic leachate from Hanford SX-113 sludge contained sodium and silicon. This could be any of ... continued below

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43 p.

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Beahm, E. C.; Weber, C. F.; Dillow, T. A.; Bush, S. A.; Lee, S. Y. & Hunt, R. D. June 1997.

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Description

Solid formation in filtered leachates and wash solutions was seen in five of the six sludges treated by Enhanced Sludge Washing. Solid formation in process solutions takes a variety of forms: very fine particles, larger particulate solids, solids floating in solution like egg whites, gels, crystals, and coatings on sample containers. A gel-like material that formed in a filtered leachate from Enhanced Sludge Washing of Hanford T-104 sludge was identified as natrophosphate, Na{sub 7}(PO{sub 4}){sub 2}F{center_dot}19H{sub 2}O. A particulate material that formed in a filtered caustic leachate from Hanford SX-113 sludge contained sodium and silicon. This could be any of a host of sodium silicates in the NaOH-SiO{sub 2}-H{sub 2}O system. Acidic treatment of Hanford B-202 sludge with 1 M, 3 M, and 6 M HNO{sub 3} sequential leaching resulted in complete dissolution at 75 C, but not at ambient temperature. This treatment resulted in the formation of solids in filtered leachates. Analyses of the solids revealed that a gel material contained silica with some potassium, calcium, iron, and manganese. Two phases were embedded in the gel. One was barium sulfate. The other could not be identified, but it was determined that the only metal it contained was bismuth.

Physical Description

43 p.

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INIS; OSTI as DE98054712

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  • Other Information: PBD: Jun 1997

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  • Other: DE98054712
  • Report No.: ORNL/TM--13371
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/665941 | External Link
  • Office of Scientific & Technical Information Report Number: 665941
  • Archival Resource Key: ark:/67531/metadc707539

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  • June 1997

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • June 14, 2016, 9:22 p.m.

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Beahm, E. C.; Weber, C. F.; Dillow, T. A.; Bush, S. A.; Lee, S. Y. & Hunt, R. D. Sludge treatment studies, report, June 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc707539/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.