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Accession Number DE2012-1016380
Title Experiments on Cake Development in Crossflow Filtration for High Level Waste.
Publication Date Apr 2011
Media Count 20p
Personal Author C. Nash M. Duignan
Abstract Crossflow filtration is a key process step in many operating and planned waste treatment facilities to separate undissolved solids from supernate slurries. This separation technology generally has the advantage of self cleaning through the action of wall shear stress, which is created by the flow of waste slurry through the filter tubes. However, the ability of filter wall self cleaning depends on the slurry being filtered. Many of the alkaline radioactive wastes are extremely challenging to filtration, e.g., those containing compounds of aluminum and iron, which have particles whose size and morphology reduces permeability. Low filter flux can be a bottleneck in waste processing facilities such as the Salt Waste Processing Facility at the Savannah River Site and the Waste Treatment Plant at the Hanford Site. Any improvement to the filtration rate would lead directly to increased throughput of the entire process. To date, increased rates are generally realized by either increasing the crossflow filter axial flowrate, which is limited by pump capacity, or by increasing filter surface area, which is limited by space and increases the required pump load. In the interest of accelerating waste treatment processing, DOE has funded studies to better understand filtration with the goal of improving filter fluxes in existing crossflow equipment.
Keywords Aluminum
Crossflow filtration
Filter cake
Filter fluxes
High level radioactive wastes
Radioactive waste processing
Waste treatment facilities

Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 77G - Radioactive Wastes & Radioactivity
68F - Radiation Pollution & Control
Corporate Author Department of Energy, Aiken, SC. Savannah River Site.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1226
Contract Number DE-AC09-08SR22470

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