Cross-Flow Filtration of Department of Energy Hanford Waste Streams Using Sintered Metal Mott and Graver Filters at the Savannah River Technology Center Page: 4 of 11
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WSRC-MS-98-00039 Rev. O
Page 1 of 8
Cross-flow Filtration of Department of Energy Hanford Waste Streams using
Sintered Metal Mott and Graver filters at the Savannah River Technology Center
Savannah River Technology Center
Waste Processing Technology Section
Westinghouse Savannah River Corporation
Aiken, South Carolina 29808
Treatment processes have been proposed that will utilize cross-flow filtration to filter
supernate and concentrated sludge waste streams at a Department of Energy plant in
Hanford, Washington. Two waste processing applications have been identified as
candidates for this technology.' The first of the Hanford applications involves filtration
of the decanted supernate from sludge leaching and washing operations. This process
requires the concentration and removal of dilute fines from the bulk of the supernate
(0.05 wt %). The second application involves filtration to wash and concentrate the
sludge during out-of-tank processing of a relatively concentrated (8 wt %) solids feed
Filter studies were conducted with a 0.5 micron cross-flow sintered metal Mott filter and
0.1 micron cross-flow Graver filter using two simulants to demonstrate solid-liquid
separation of the waste streams.
Simulants were developed at Pacific Northwest National Laboratory (PNNL)2 for testing
of cross-flow filtration processes. The composition of the simulants are shown in Table
1. The simulants represent Hanford waste and were developed to accurately reflect the
physical properties, in particular the particle size, of the Hanford waste. The simulant
that contained 0.05 wt % insoluble solids represents supernate from the settled sludge
while the 8.0 wt % simulant represents unwashed retrieved sludge.
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Walker, B.W. & McCabe, D.J. Cross-Flow Filtration of Department of Energy Hanford Waste Streams Using Sintered Metal Mott and Graver Filters at the Savannah River Technology Center, article, May 1, 1998; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc689754/m1/4/: accessed January 22, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.