Recycling of Solid, Inorganic, Zinc-Bearing Industrial Process Wastes

EPA Contract Number: 68D10065
Title: Recycling of Solid, Inorganic, Zinc-Bearing Industrial Process Wastes
Investigators: Waite, Michael D.
Small Business: Chemical Reclamation Technologies
EPA Contact: Manager, SBIR Program
Phase: II
Project Period: September 1, 1991 through April 1, 1993
Project Amount: $150,000
RFA: Small Business Innovation Research (SBIR) - Phase II (1991) Recipients Lists
Research Category: Small Business Innovation Research (SBIR)


Each year many millions of pounds of solid, inorganic waste is generated by zinc processing industries in the USA. In addition to zinc, these wastes typically contain other toxic heavy metals like barium, copper, cobalt, man- ganese, magnesium, lead, and nickel. Few of these wastes are recycled. Generally they are dumped into either a hazardous waste facility or sanitary land fill.

A recycle technology has been developed by Chemical Reclamation Technologies that is capable of nearly 100% recovery of such wastes. Samples of solid zinc-bearing wastes from zinc phosphate pretreatment, zinc plating, and steelmaking operations have been successfully reclaimed. The process generates two endproducts which are poten- tially marketable. Both end products have wide industrial application. The recovery technology features an electro- chemical method of removing iron from the various waste sources. Iron is a major contaminant in nearly all zinc wastes.

The purpose of the Phase II effort is to continue to develop the technology to the point of commercialization. Four principal objectives must be met to accomplish the mission: (1) design and construct a prototype process, (2) pilot operation to determine optimum methods and cost, (3) adaptation of the process to other potential waste sources, and (4) front end engineering.

Supplemental Keywords:

RFA, Scientific Discipline, Toxics, INTERNATIONAL COOPERATION, Waste, Sustainable Industry/Business, Chemical Engineering, cleaner production/pollution prevention, Environmental Chemistry, Sustainable Environment, chemical mixtures, Technology for Sustainable Environment, Hazardous Waste, New/Innovative technologies, Chemistry and Materials Science, Engineering, Hazardous, 33/50, Environmental Engineering, hazardous liquid waste, complex mixtures, hazardous waste disposal, hazardous waste treatment, cobalt, industrial waste, chemical waste, hazardous waste recycling, lead & lead compounds, recycled waste products, lead, metal complexes, metal recovery, electrochemical techniques, electrochemical, zinc phosphating, chemical releases, nickel & nickel compounds, extraction of metals, electrochemical treatment

Progress and Final Reports:

  • Final