Bench-Scale Filtration Testing in Support of the Pretreatment Engineering Platform (PEP)

Billing, Justin M.; Daniel, Richard C.; Kurath, Dean E.; Peterson, Reid A.

doi:10.2172/967931

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Table 4.2 in Billing et al 2009). (b) The range of particle size values is derived from PSD results reported for Integrated Tests A and B Geeting et al 2009).…”

Section: Waste Simulantmentioning

confidence: 99%

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Filtration Understanding: FY10 Testing Results and Filtration Model Update

Daniel¹,

Billing²,

Burns³

et al. 2011

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SummaryThis document completes the requirements of Milestone 2-4, Final Report of FY10 Testing, discussed in the scope of work outlined in the EM31 task plan WP-2.3.6-2010-1. The focus of task WP-2.3.6 is to improve the U.S. Department of Energy's (DOE's) understanding of filtration operations for high-level waste (HLW) to improve filtration and cleaning efficiencies, thereby increasing process throughput and reducing the Na demand (through acid neutralization). Developing cleaning/backpulsing requirements will produce much more efficient operations for both the Hanford Tank Waste Treatment and Immobilization Plant (WTP) and the Savannah River Site (SRS), thereby significantly increasing throughput by limiting cleaning cycles. Indeed, current program results derived from Pacific Northwest National Laboratory (PNNL) studies indicate that a ~35% increase in filter throughput can be achieved by optimization of backpulse frequency alone. In this report, the results of FY10 testing conducted under EM31 task plan WP-2.3.6-2010-1 are presented and discussed. The scope of this work is to develop the understanding of filter fouling to allow developing this cleaning/backpulsing strategy.The overall approach to this task is:  Review previous cross-flow testing at SRS, PNNL, and other peer review journals to direct testing activities for this task. Develop a predictive model that reflects the important physical mechanisms of fouling and cleaning for use in determining effective filter cleaning strategies for a variety of feeds. Develop simulants that can result in significant irreversible fouling, but also are representative of the types of materials that are present in HLW. Test these simulants in bench-scale equipment to identify the cleaning requirements for these feeds. Develop a cleaning strategy to optimize throughput while minimizing added Na. Validate the model and operational strategy with actual waste samples as appropriate.The FY10 work discussed in the current report focused on tests that would improve understanding of filter fouling dynamics to allow development of improved filtration models. To this end, three filtration test programs were conducted to provide insight into dynamics of filter fouling and the efficacy of flux recovery operations, including both backpulsing of the filter and chemical cleaning regimens. The three testing programs were: Series 1, Long Term Fouling Tests -examined flux decline when filtering the Pretreatment Engineering Platform (PEP) waste simulant slurry for long periods of time without backpulsing. Previous filtration testing has only studied filter flux dynamics over relatively brief periods of operation (4-12 hours) with respect to expected filtration operation times at WTP (on the order of 100 hours). The aim of Series 1 testing was to answer this need. Series 2, Component Fouling Tests -determined the filtration behavior of the major components that comprise the PEP simulant. By examining each solid component separately, the nature of particle-particle and particle me...

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“…Table 4.2 in Billing et al 2009). (b) The range of particle size values is derived from PSD results reported for Integrated Tests A and B Geeting et al 2009).…”

Section: Waste Simulantmentioning

confidence: 99%

“…Finally, the slurry volumes for Series 1 testing were selected to be similar with the slurry solids to filter surface area ratios employed in PEP Low-Solids Scaling Tests Billing et al 2009). An extensive set of physical property data were not available at the time test volume was selected.…”

Section: Waste Simulantmentioning

confidence: 99%

Filtration Understanding: FY10 Testing Results and Filtration Model Update

Daniel¹,

Billing²,

Burns³

et al. 2011

Self Cite

View full text Add to dashboard Cite

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A Brief Review of Filtration Studies for Waste Treatment at the Hanford Site

Daniel¹,

Schonewill²,

Shimskey³

et al. 2010

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SummaryThis document completes the requirements of Milestone 1-2, PNNL Draft Literature Review, discussed in the scope of work outlined in the EM-31 Support Project task plan WP-2.3.6-2010-1. The focus of task WP-2.3.6 is to improve the U.S. Department of Energy's (DOE's) understanding of filtration operations for high-level waste (HLW) to enhance filtration and cleaning efficiencies, thereby increasing process throughput and reducing the sodium demand (through acid neutralization). Developing the processes for fulfilling the cleaning/backpulsing requirements will result in more efficient operations for both the Hanford Tank Waste Treatment and Immobilization Plant (WTP) and the Savannah River Site (SRS), thereby increasing throughput by limiting cleaning cycles.The purpose of this document is to summarize Pacific Northwest National Laboratory's (PNNL's) literature review of historical filtration testing at the laboratory and of testing found in peer-reviewed journals. Eventually, the contents of this document will be merged with a literature review by SRS to produce a summary report for DOE of the results of previous filtration testing at the laboratories and the types of testing that still need to be completed to address the questions about improved filtration performance at WTP and SRS. To this end, this report presents 1) a review of the current state of crossflow filtration knowledge available in the peer-reviewed literature, 2) a detailed review of PNNLrelated filtration studies specific to the Hanford site, and 3) an overview of current waste filtration models developed by PNNL and suggested avenues for future model development.This extensive review provides a starting point to help achieve the ultimate goal of the current project, which is to identify technologies such as modifications to the process (e.g., reconfiguration of the filter geometry or changes to operational techniques) or the use of physical property modifiers that increase the sustainability of the filter process. Overall, two avenues of future model development are recommended: 1) determination of long-term filtration dynamics of actual waste and waste simulant slurries and 2) evaluation of the impact of solution chemistry on the rate of filtration and filter fouling. A better understanding of these long-term fouling dynamics and solution chemistry effects will help in developing better predictive models and improved process optimization.v

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Bench-Scale Filtration Testing in Support of the Pretreatment Engineering Platform (PEP)

Cited by 2 publications

References 8 publications

Filtration Understanding: FY10 Testing Results and Filtration Model Update

Filtration Understanding: FY10 Testing Results and Filtration Model Update

A Brief Review of Filtration Studies for Waste Treatment at the Hanford Site

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