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In 2006, the plant's outdated, operator intensive and costly process was replaced with a state of the art microfiltration and filter press system from Siemens Water Technologies.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

New tracers help identify fracking fluids, improving shale gas wastewater treatment

Scientists at Duke University have developed new geochemical tracers that can identify hydraulic fracturing flowback fluids that have been spilled or released into the environment.

CA water district to improve operations with lab information management systems

Accelerated Technology Laboratories has officially announced that the Coachella Valley Water District of California will begin implementing ATL's Sample Master Pro Laboratory Information Management System.

PRSA honors San Diego Public Utilities Dept with Public Affairs Award for outreach program

Regarding its Water Purification Demonstration Project's public outreach program, the San Diego Public Utilities Department received the 2014 Edward L. Bernays Silver Award of Merit for Public Affairs from the Public Relations Society of America San Diego/Imperial Counties Chapter.

Washington DOE approval granted to HaloSource for hybrid water treatment technology

HaloSource recently announced that it has received the Washington State Department of Ecology's General Use Level Designation for its BHR-P50 hybrid polymer used in conjunction with Chitosan Enhanced Sand Filtration system.

FOLLOW US ON SOCIAL MEDIA