Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Recycling of chrome plating sludge
Junior Sales Representative - Resintech, Camden, NJ
Nadcap Chemical Processing Auditor - PRI, traveling
Process Engineer / Chemist - Denver Metal Finishing, Colorado
Q. Can we recycle the Ferro Chrome sludge to reduce the Fe content by firing the sludge at high temp of 1500-1600 °C in Rotary Kiln to increase the Chrome & Alumina content in it?
Sanjay JoshiHobbyist - NASHIK [India]
August 14, 2022
⇩ Related postings, oldest first ⇩
Q. I would like to find out if there is any electrotechnology that could be used to recycle chromium oxide from plating sludge.
Joyce JabaneResearcher involved in waste management in plating industry. - Johannesburg, Gauteng, RSA
2003
A. Hi Joyce. Is this a sludge from the wastewater treatment of a general plating shop, which contains among other things some chrome . . . or is it the bottom sludge from a self-regulating chrome plating bath? If you can describe in more detail the concentration of chromic oxide, the contaminant levels, and the volumes you are contemplating, someone may be able to assist you with some direction. In response to the general question of whether wastewater treatment sludges from plating shops are recyclable, the current short answer is probably no. Good luck.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003
Q. My objective is to recycle chromic oxide from plating sludge. This sludge consist of 60% chromic oxide. The rest is water, Fe, Si, Al and Hydrofluoric acid. I would like to find out if there is a feasible way of recycling this chemical from plating sludge. I would also like to know the technology that could be used for recycling.
Joyce Jabane [returning]- South Africa
2004
A. The answer is yes.You can do it in Gauteng
piet van Eeden- Germiston, Gauteng. South Africa
November 16, 2011
November 16, 2011
Hi, Piet, and thanks.
But Joyce's question was how she can do it ("...like to know the technology..."), rather than where she can find someone to do it for her (I think.)
Can you introduce the general technology for how she can do it?
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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A. Yes. These wastes could also be treated by the biohydrometallurgy, and further recovering the valuable metals from them.
Vincent Zhou- Changsha, Hunan, China
November 12, 2018
Recycling of off spec hard chrome plating bath
Q. We have an off spec hard chrome HEEF bath that we need to get rid off. Approximately 2,000 gallons worth of it. We've already pumped it out of the tanks and remade the tanks to spec, so I need to dispose of this 2,000 gallons of off spec bath. Seems like such a shame to pay to have it disposed of as a hazardous material when it contains thousands and thousands of dollars worth of chromium. Do I have any options for recycling it, either in house or through a recycling disposal company?
Brandon ChaseEHS Manager in plating shop - Detroit, Michigan
February 4, 2020
Q. The most obvious place to ask this question is AtoTech where you originally bought the chemicals.
That said, the answer may well be: "We have no better idea than to properly dispose it through a permitted treatment and disposal company."
And that will not be cheap.
It should be motivation to take better care of your chrome bath in the future. There are certainly chrome baths being operated which are now decades old.
Jeffrey Holmes, CEF
Spartanburg, South Carolina
February 12, 2020
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