Case Study: Siemens Microfiltration System Reduces Battery Maker's Heavy Metal Waste by Two-Thirds

Sponsored by

Challenge
A manufacturer located in Waco, Texas, is one of a the few manufacturers of rechargeable, nickel cadmium batteries for the aerospace industry. One of the production problems associated with the manufacture of rechargeable, nickel cadmium batteries is the use of a number of heavy metals. Two of the metals which can be problematic when it comes to waste disposal are cadmium and chromium.

The amount of heavy metal waste generated at the Waco facility categorized the plant as a "significant hazardous waste generator," which created costly off-site hazardous waste disposal and extensive record keeping and documentation. Since 1972, the plant has used a diatomaceous filter system to reduce the volume and concentrate heavy metals in the waste. The plant's hazardous waste production required transport from the plant of over 100,000 pounds (45,360 kg) per year.

Solution
In 2006, the plant's outdated, operator intensive and costly process was replaced with a state of the art microfiltration and filter press system from Siemens Water Technologies. Siemens Water Technologies designed a complete wastewater treatment system consisting of metals precipitation, microfiltration, filter press dewatering and pH adjustment of the clarified effluent prior to introduction to the city sewer system.

Results
The microfiltration system is producing effluent with a cadmium and chromium monthly average of less than permitted levels. Reduced volume of waste by using a filter press is estimated to only being 30,000 pounds (13,360 kg) per year. This will lower the plant's categorization of being a hazardous waste generator to below "significant." The re-categorization also reduces the amount of report generation required. The new wastewater treatment system fit within the old system's footprint.

Click here to download a PDF of the Case Study

###

Sponsored by

TODAY'S HEADLINES

Chilean mine contract kick-starts Degremont’s mobile water business

Chilean mining company SCM Minera Lumina Copper Chile has awarded French company Degremont a contract to supply 50 m3/hour reverse omosis mobile water treatment unit...

Drinking water access to be improved in Myanmar

SUEZ ENVIRONNEMENT's engineering subsidiary SAFEGE has been selected to support the Green City project for Myanmar's second largest city, Mandalay...

Oil sands tailings reclamation to be improved with novel solar energy-driven process

University of Alberta civil engineering professors have developed a novel technique that uses solar energy to accelerate tailings pond reclamation efforts by industry, ultimately helping to make the cleanup process of oil sands tailings more environmentally friendly.

MWH to support implementation of capital improvement plan for FL county

The Palm Beach County Water Utilities Department of Florida has awarded a contract to MWH Global to assist in delivery of the company's 2015-2020 capital improvement plan as owner's advisor.

FOLLOW US ON SOCIAL MEDIA