Steel manufacturer conducts engineering study on water treatment

June 25, 2014
In this installment of What Works, US Steel gets its $1.8 million waste treatment under control.

US Steel was interested in significantly reducing the generation of hazardous waste from its finishing operation in Portage, Indiana. Recently, its cyanide-based plating solution was replaced with an MSA-based bath at the tin mill. This left chromium as the sole hazardous waste constituent generated from the plant. Also, a new acid pickle recycling service was installed, which affected the chromium waste treatment process. This change required the steel manufacturer to purchase chromium reduction chemicals at an annual cost in excess of $300,000/year. The treatment chemicals reduced the hexavalent chromium to a trivalent form, which was then precipitated at the chrome waste treatment plant. The resulting 35 million lb/year of hazardous chromium sludge was disposed of on-site at a captive land fill. A planned new treatment plant maintained the status quo and didn’t offer any benefits, such as elimination of hazardous waste generation via chromium recovery or water recycle. Waste treatment and disposal costs were approximately $1.8 million/year and didn’t include the manufacturer’s corporate environmental liability for potential cleanup of the landfill.

Read the full story here

Sponsored Recommendations

Reduce engineering time by 50%

March 28, 2024
Learn how smart value chain applications are made possible by moving from manually-intensive CAD-based drafting packages to modern CAE software.

Filter Monitoring with Rittal's Blue e Air Conditioner

March 28, 2024
Steve Sullivan, Training Supervisor for Rittal North America, provides an overview of the filter monitoring capabilities of the Blue e line of industrial air conditioners.

Limitations of MERV Ratings for Dust Collector Filters

Feb. 23, 2024
It can be complicated and confusing to select the safest and most efficient dust collector filters for your facility. For the HVAC industry, MERV ratings are king. But MERV ratings...

The Importance of Air-To-Cloth Ratio when Selecting Dust Collector Filters

Feb. 23, 2024
Selecting the right filter cartridges for your application can be complicated. There are a lot of things to evaluate and consider...like air-to-cloth ratio. When your filters ...