Alum for water treatment
Alum for water treatment
(OP)
We have a water precipitator to treat river water that will be used for equipment cooling, not for boiler water or drinking water. Some of the cooling water is returned to the river without further treatment. We use "purified" alum as a coagulant. Is there a such thing as "un-purified" alum that would be less expensive? If so, are there environmental concerns?
Thanks,
Brian
Thanks,
Brian





RE: Alum for water treatment
RE: Alum for water treatment
If so, what they do with spent sulfuric acid anodizing solution [some purify, most neutralize into alum & dump].
Also, ask what alloys they mostly anodize [2024 & 7075 have Cu, Cr, Zn, etc.; 5000- & most 6000-series are better].
May get for free but need to test for Cu, Cr & Zn.
RE: Alum for water treatment
RE: Alum for water treatment
http://www.genchemcorp.com/products/alumliq.shtml
http:
Alum was formerly supplied without NSF certification. Ask them if there is a cost difference with/without NSF certification.