Status and progress in sludge washing: A pivotal pretreatment method

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Description

Separation of the bulk soluble chemical salts from the insoluble metal hydroxides and radionuclides is central to the strategy of disposing Hanford tank waste. Sludge washing and caustic leaching have been selected as the primary methods for processing the 230 million L (61,000,000 gal) of Hanford tank waste. These processes are very similar to those selected for processing waste at the West Valley Site in New York and the Savannah River Site in South Carolina. The purpose of sludge washing is to dissolve and remove the soluble salts in the waste. Leaching of the insoluble solids with caustic will be ... continued below

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14 p.

Creation Information

Barton, W. B.; MacLean, G.T.; Meng, C.D. & Winkler, C.M. January 1, 1995.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • Westinghouse Hanford Company
    Publisher Info: Westinghouse Hanford Co., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Description

Separation of the bulk soluble chemical salts from the insoluble metal hydroxides and radionuclides is central to the strategy of disposing Hanford tank waste. Sludge washing and caustic leaching have been selected as the primary methods for processing the 230 million L (61,000,000 gal) of Hanford tank waste. These processes are very similar to those selected for processing waste at the West Valley Site in New York and the Savannah River Site in South Carolina. The purpose of sludge washing is to dissolve and remove the soluble salts in the waste. Leaching of the insoluble solids with caustic will be used to dissolve aluminum hydroxide and chromium hydroxide, and convert insoluble bismuth phosphate to soluble phosphate. The waste will be separated into a high-level solids fraction and a liquid fraction that can be disposed of as low-level waste after cesium removal. The washing and leaching operations involve batchwise mixing, settling, and decanting within the existing underground storage tanks.

Physical Description

14 p.

Notes

INIS; OSTI as DE95006768

Source

  • Waste management `95, Tucson, AZ (United States), 26 Feb - 2 Mar 1995

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  • Other: DE95006768
  • Report No.: WHC-SA--2696
  • Report No.: CONF-950216--62
  • Grant Number: AC06-87RL10930
  • Office of Scientific & Technical Information Report Number: 27826
  • Archival Resource Key: ark:/67531/metadc669231

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  • January 1, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Feb. 9, 2016, 1:45 p.m.

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Barton, W. B.; MacLean, G.T.; Meng, C.D. & Winkler, C.M. Status and progress in sludge washing: A pivotal pretreatment method, article, January 1, 1995; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc669231/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.