Removal of Toxicity, COD, and Fe from a Metal-Working Facility UF Permeate
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 18, Issue 1
Abstract
A metal-working facility employs two ultrafiltration (UF) membrane systems to treat spent metal working fluids and oily waste from sumps and other nonpoint sources. The facility is regulated for oil/grease, toxicity and Fe. Chemical-oxygen demand (COD) will be added in future permits. Also, the facility’s domestic wastewater treatment plant is aging, requiring replacement. Short-term treatment solutions were developed for toxicity and total Fe. A long-term approach for addressing Fe, toxicity, and COD and treatment of the facility’s domestic wastewater in a single bioprocess was also investigated. In the short term, granular activated carbon (GAC) columns were selected to remove toxicity and an aeration/pH adjustment/settling process was selected for Fe. Toxicity, COD, and Fe were removed successfully in a biological sequencing batch reactor (SBR) process, and a packaged conventional wastewater treatment plant will most likely be the chosen long-term solution. Depending on the discharge COD limit, an activated carbon polishing step may be needed prior to discharge.
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Published In
Journal of Hazardous, Toxic, and Radioactive Waste
Volume 18 • Issue 1 • January 2014
Pages: 2 - 10
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Mar 8, 2012
Accepted: Dec 26, 2012
Published online: Dec 29, 2012
Discussion open until: May 29, 2013
Published in print: Jan 1, 2014
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