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Letter 20094
Is RH meter necessary for a treatment
plant treating CR6+ [India]
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Hello -
I am consulting for an company having its own Effluent treatment
plant for treating hexavalent chromium. They are using sodium
bisulphite, sulphuric acid and sodium hydroxide in the process. The
system is automatic and they are using PH meters and RH meters. I
understand the need for PH meter but why is a RH meter necessary in
the plant?? There is no misting in the plant!! Looking forward to
some insights!!
Anand Narayan
NCS Associates - Coimbatore, Tamilnadu, INDIA
First of two simultaneous responses -- +++
Sorry, I don't know what you mean by 'RH meter', that's not a
phrase I am familiar with. But ORP meters are necessary to determine
if the hexavalent chromium has been reduced to trivalent form.
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Ted Mooney, P.E.
finishing.com
Brick, NJ
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Second of two simultaneous responses -- +++
Maybe the "RH meters" are ORP [oxidation-reduction potential]
meters. ORP meters/controllers are needed for automated treatment of
hexavalent chromium.
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Ken Vlach
- Goleta, California
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