Zero Waste Logo The Zero Wate Network the University of Texas at Arlington Center for Environmental Excellence Environmental Training Institute Logo  

Join Us on:

Social Network Nav Bar

Lean and P2 Workshops

Houston, TX
11/18/14 - 11/20/14

 

More...

 

Environmental Management Systems Workshops

Arlington, TX
03/03/15 - 03/06/15

Houston, TX
04/07/15 - 04/10/15

Albuquerque, NM
05/12/15 - 05/15/15

 

More...

Case Study Database

           Add Story    |    Search Case Studies    |   

 

Alenco

Year Submitted: 2003

Process: Painting/Coating

Industry: Metal Fabrication

Wastes Reduced: Solid waste

Substance: Chromium

Equipment: Zirconium Plating

Location: Bryan TX

No. of employees: 850

Contact: Chuck Fontaine

Phone: (409) 779-7770



Description:

ALENCO extrudes and paints aluminum for the building products industry. The extrusions were conversion coated with hexavalent chromium prior to painting to enhance the adhesion between the coating and the aluminum. In 1991, ALENCO made a corporate decision to eliminate chromium from its operation. After extensive testing, a zirconic acid system was selected. The equipment was modified and additional equipment installed in December 1991. On-line testing began in January 1992. Production began in June 1992. To date, in excess of 45 million pounds of aluminum have been successfully coated with this system.

P2 Application:

The technology of replacing chromium with zirconium is not new. Some formulation modifications were necessary to improve flow and provide more uniform drying. Other minor application changes were also required. The major factor in the success of this project was the corporate decision to make it happen.

Environmental Benefits:

The process eliminated the use of hexavalent chromium that had to be converted to trivalent chromium to be acceptable for disposal. The conversion was costly and produced over 160 cubic yards of waste to be landfilled. The potential liabilities were enormous. The change to the zirconic acid system eliminated the use of chromium, its associated waste streams and its liabilities.

Details of Reductions

Additional Information :

Modifications to the existing system cost $60,000. Disposal cost savings for the first year were $60,000. Return on investment was one year. With constantly increasing disposal costs, the economic benefits are clear.

Source: TCEQ



SHEP Shield
Safety
Health and
Environmental
Professional



ERP Shield
Environmental
Regulatory
Professional



ESP Shield
Environmental
Science
Professional



EMP Shield
Environmental
Management
Professional

Attend a workshop and
earn credits toward a
Professional Certification

 

 



The Zero Waste Network is one of eight Pollution Prevention Resource Exchange P2RxCenters , serving as a national network of regional information centers: NEWMOA (Northeast), WRRC (Southeast), GLRPPR (Great Lakes), ZeroWasteNet (Southwest), P2RIC (Plains), Peaks to Prairies (Mountain), WSPPN (Pacific Southwest), PPRC (Northwest). We are a proud member of the National Pollution Prevention Roundtable.

National P2 Roundtable Logo