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Disc Tube Module Technology
Rochem Separation Systems, Inc.
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Demonstration Bulletin - SITE
Demonstration Bulletin Disc Tube Module Technology
, Rochem Separation Systems, Inc. (24K)
Evaluation Report - Rochem
Separation Systems, Inc. Disc Tube Technology
Innovative Technology Evaluation Report (275K)
Capsule - Site Technology
Capsule Rochem Separation Systems, Inc.
Disc Tube Module Technology (83K)
U.S. EPA Superfund Innovative Technology Evaluation (SITE) Program
Rochem Disc Tube Module System
Rochem Separation Systems, Inc.
ABSTRACT
The Rochem Disc Tube Module System
uses membrane separation to treat aqueous solutions ranging from seawater to leachate
contaminated with organic solvents. The system uses reverse osmosis through a
semipermeable membrane to separate purified water from contaminated liquids. Osmotic
pressure causes water (or other compounds with similar diffusion rates) to flow across a
semipermeable membrane from a lower salt concentration toward a higher salt concentration
until the concentrations are in equilibrium. In reverse osmosis, the more saline solution
is pressurized such that water flows through the membrane leaving concentrated
contaminants behind. The purified water is recovered and hazardous chemicals are
concentrated in an aqueous brine. Open-channel, fully turbulent flow prevents accumulation
of suspended solids on the separation membranes, ensuring efficiency is not reduced by
settled solids. The technology was demonstrated for 3 weeks in August 1994 at the Central
Landfill Superfund site in Johnston, Rhode Island. Over 99% of total dissolved solids,
over 96% of total organic carbon, and 99% of all target metals were removed from the
landfill leachate, at flow rates of 4 gpm.
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Posted June 22, 1999
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