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In 2006, the plant's outdated, operator intensive and costly process was replaced with a state of the art microfiltration and filter press system from Siemens Water Technologies.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

CH2M HILL lauded for noteworthy wastewater treatment projects

CH2M HILL has been recognized with two Global Water Awards for its exceptional infrastructure work involving Peru's Taboada Wastewater Treatment Plant and the Bahrain Petroleum Company.

Winners of 2013 Campus RainWorks Challenge targeting green infrastructure announced

Four winners of the Environmental Protection Agency's second annual Campus RainWorks Challenge were recently announced.

S.F. Bay water quality, wetlands to be improved with $5M EPA grants

Nearly $5 million in grants provided by EPA have been designated to restore water quality and wetlands throughout the San Francisco Bay watershed.

Aeration Problem?

A supposed aeration problem is often nothing of the sort; it is simply the need for an efficient and appropriate mixer. Therefore, any facility striving to achieve as much treatment as possible on-site should consider mixing to reduce total operation costs.