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In 2006, the plant's outdated, operator intensive and costly process was replaced with a state of the art microfiltration and filter press system from Siemens Water Technologies.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

Online Zeta Potential Measurement Provides Water Treatment Control, Cost Reduction

Online zeta potential measurements can provide real-time water quality monitoring and support effective process control under all circumstances. The value of online measurement is illustrated through the experiences of Aurora Water, which is using zeta potential at one facility as both an offline and online tool for monitoring and controlling water treatment processes.

Pacific Institute issues helpful analysis of CA water bond to better inform Nov voters

Voters on CA's November ballot will be asked whether to approve Proposition 1, the Water Quality, Supply and Infrastructure Improvement Act. As such, the Pacific Institute has released an objective new report that helps voters untangle the complexities of the water bond measure.

Research offers unique insight into monitoring groundwater at Ohio fracking sites

A new research project at the University of Cincinnati is taking a groundbreaking approach to monitoring groundwater resources near fracking sites in the state of Ohio.

EPA announces preliminary determination to regulate strontium in drinking water

EPA has announced that it has officially made a preliminary determination to regulate strontium in U.S. drinking water. Strontium is a naturally occurring element that, at elevated levels, can impact bone strength in individuals who do not consume enough calcium.

FOLLOW US ON SOCIAL MEDIA