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The sludge is green in color so we think it contains significant amount of nickel. Could we plate out the nickel?

Due to a huge increase in production of our aluminum products, we are evaluating the installation of an anodize line into our plant in order to anodize the parts in house instead of shipping parts off-site. Currently, we do not have any process wastewater discharges to the sewer. However, the scrubber water overflow does go to drain. Because this flow is very small, probably less than 100 gallons per day, the supplier says that this scrubber water can be discharged to the sewer “with no problem.”

Looks like our replacement project failed. Before we try again, do you have experience with this issue?

Do you have any more insight on this pesky issue? Since the permit limitation for molybdenum has significantly changed, the city is giving us some time to address the issue before they start issuing notices of violation.

Is there a process or commercial equipment to electrodeposit Zn, Ni, Cr, Fe, and remove the heavy metals from the wastewater?

Can you provide information on a pH/precipitation system that will speed up the process of removing metals and patina chemicals from wastewater?

Question: We operate a metal fabrication shop with our own five-stage iron phosphate washer.

Stand-alone system can link to new or existing processing lines to optimize cleaning chemical costs, reduce waste disposal expenditure and enhance production quality.

Question: We do acid and alkaline zinc as well as copper/nickel/chrome plating.