Summary for spent sulfuric acid Discussion
Spent sulfuric acid is the focus keyphrase here: David M. Weaver of Toccoa, Georgia offered excess sulfuric acid from an anodizing-line acid recovery unit free to anyone who could use it, suggesting it might work well as a waste-treatment additive and noting that analysis could be provided on request. In response, Wadsworth, Ohio said the material sounded like a good application for waste treatment, pointing out that the aluminum content could help with mechanical settling and that the sulfuric acid would be less hazardous to handle than concentrated sulfuric acid. The responder then raised a practical question of their own: why not use the recovered acid for waste treatment at the source? The thread is brief and contains no disagreement, only a practical endorsement of reuse and an implied suggestion to evaluate in-house use first.
Q. Have excess sulfuric acid from acid recovery unit from an anodizing line. Would make excellent waste treatment additive, and we would be willing to give the solution free to someone who could use it. We can provide analysis of solution upon request.
David M. Weaver [deceased]
– Toccoa, Georgia
Ed. note: With great sadness we must advise that David passed awayt on Aug. 15, 2003.
1998
A. This sounds like a good application to me. The aluminum ought to be helpful in mechanical settling, and the sulfuric acid is less dangerous to work with than concentrated sulfuric. Which demands the question: why can’t you use it for waste treatment yourself?
Ted Mooney, P.E.
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.
1998
A. It seems anodizers always have an excess of acid, particularly sulfuric with dissolved aluminum. It would be nice if we could match up with someone with the opposite problem. However, wouldn’t some hazardous waste regulation prevent this kind of exchange. i.e.,storing,transporting,etc. It only makes too much sense
Chris Jurey, Past-President IHAA
Luke Engineering & Mfg. Co. Inc.
Wadsworth, Ohio
1997
Q. We do use it in our waste treatment system, but our processes generate more than what we can utilize. Also, if the solution is good waste treatment chemicals it can be shipped like any normal solution you buy from your industrial chemical supplier i.e sulfuric acid. There are a lot of non-anodizer facilities that would make a good match thats what I am trying to accomplish, and yes you are right, it does make too much sense, it would be a win-win situation for the anodizer and the final end-user recycling this product for good use.
David M. Weaver [deceased]
– Toccoa, Georgia
Ed. note: With great sadness we must advise that David passed awayt on Aug. 15, 2003.
A. Mfgrs. of Aluminum sulphate use a lot of sulfuric.
Mike Williams
1999