Self Contained Electrochemical System for Treating Paint Residue

EPA Contract Number: 68D60025
Title: Self Contained Electrochemical System for Treating Paint Residue
Investigators: Tennakoon, Charles
Small Business: Lynntech Inc.
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1996 through March 1, 1997
Project Amount: $70,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1996) RFA Text |  Recipients Lists
Research Category: Hazardous Waste/Remediation , SBIR - Waste , Small Business Innovation Research (SBIR)


Disposal of paint residue from aircraft depainting operations poses a problem as the polymeric paint contains toxic metal impurities. The metals (particularly chromate) cause the entire spent media and paint residue to be classified as a hazardous waste. The innovative approach described in the proposal deals with: 1) leaching of toxic metals into an aqueous phase by acid digestion; 2) combined removal of toxic metals by precipitation using an electrochemical step; and 3) electrodeposition from a mixed metal solution to form a chromium containing alloy. It is anticipated that acid digestion would detoxify the polymeric waste for disposal in a landfill. The process is novel because it both extracts the metallic impurities from the paint residue and then recovers the metals in the form of an alloy. In Phase I, bench-scale proof of concept studies will be carried out to demonstrate the principles of the innovation. This will provide the technical foundation to develop a lab-scale reactor to conduct parametric studies to obtain necessary data for scaling up the process, and validate the bench-scale results.

Supplemental Keywords:

small business, SBIR, engineering, chemistry, reuse, recovery, hazardous waste., RFA, Scientific Discipline, Waste, Sustainable Industry/Business, cleaner production/pollution prevention, Environmental Chemistry, Hazardous Waste, Engineering, Hazardous, Environmental Engineering, aircraft depainting, polymeric waste, cleaner production, waste minimization, waste reduction, chromate, paint removal, paint stripping, clean technology, electrodeposition, electrochemical techniques, leaching of toxic metals, innovative technology, hazardous chemicals, acid digestion, pollution prevention, paint residue, green technology, polymeric coatings

Progress and Final Reports:

  • Final