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EPA 540-A5-90/007
E.I. DuPont De Nemours & Company/Oberlin Filter
Company Microfiltration Technology
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E.I. DuPont De Nemours & Company/Oberlin Filter
Company Microfiltration Technology (2.1M)
ABSTRACT
E.I. DuPont De Nemours & Company/Oberlin
Filter Company Microfiltration Technology
Applications Analysis Report
EPA 540-A5-90/007
October 1991
The DuPont/Oberlin microfiltration technology uses an automatic pressure filter
(developed by Oberlin Filter Company) with a new microporous TyvekŪ filter media
(TyvekŪ T-980) to remove metals (present in soluble and insoluble form) and
particulates from liquid wastes. The technology removes particles that are 0.1
microns in diameter, or larger, produces a filter cake with a 40 to 60% solids
content and a filtrate that meets applicable disposal requirements. The membrane
filtration system is applicable to hazardous waste suspensions, particularly
heavy metal- and cyanide bearing liquid wastes (e.g., electroplating rinsewaters),
heavy metal contaminated groundwater, landfill leachate and process wastewaters
containing uranium. The technology was demonstrated at the Palmerton Zinc Superfund
site in Palmerton, Pennsylvania over a 4-week period in April and May 1990.
Heavy metal contaminated goundwater obtained from site wells was used for the
test. The groundwater was contaminated with dissolved heavy metals, including
cadmium, lead, a nd zinc. The microfiltration system achieved zinc and total
suspended solids (TSS) removal efficiencies of about 99.95 % and a filter cake
solids content of 41 %. The filter cake contained no free liquids and a composite
sample from all the demonstration runs passed both the extraction procedure
toxicity test and the toxicity characteristic leaching procedure (TCLP) test.
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Posted February 26, 1999
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