Precipitation of drinking water after boiling
Precipitation of drinking water after boiling
(OP)
I run a small potable water treatment plant which uses convetional method (flocculation, sedimentation and filtration), chemicals used are alum and lime and HTH, all are added at once in the floculation chamber, turbidity,pH and residual chlorine levels after treatment are all ok. If you boil the water it precipitates some whitish stuff and is cause some itching after taking a hot bath (what should i do). The chemistry of the treated water is as follows;
Total alkalinity = 140ppm
Sulphate = 164ppm
calcium = 23.9ppm
magnesium = 29.1ppm
The water is sourced from a river.
Total alkalinity = 140ppm
Sulphate = 164ppm
calcium = 23.9ppm
magnesium = 29.1ppm
The water is sourced from a river.





RE: Precipitation of drinking water after boiling
What is the combined chlorine (chloramine) concentration (total chlorine minus free chlorine)? If this is above 0.2 ppm or so, it's capable of causing the itching problem.
Is the whitish precipitate calcium sulfate?
Orenda
RE: Precipitation of drinking water after boiling
S. Bush
www.water-eg.com
RE: Precipitation of drinking water after boiling
Sbush, what level of aluminum is expected in the effluent if it is overfed? - thank you.
RE: Precipitation of drinking water after boiling
Gary Schreiber, CWS VI
The Purolite Co.
RE: Precipitation of drinking water after boiling
There is nothing in the information that you have presented that will cause dry skin.
"Most of us experience dry and itchy skin from time to time, but you should seek medical attention if discomfort becomes severe," says Dr. Lauren Sternberg, a dermatologist at NewYork-Presbyterian Hospital/Weill Cornell Medical Center. "The best thing you can do to relieve the itch is to moisturize your skin because, unfortunately, you can't do anything about the weather."
"Remember, dry skin is due to lack of water. Apply moisturizers immediately after bathing or showering, while your skin is still wet to trap water in the skin," notes Dr. Sternberg.
She suggests the following tips to turn your skin from alligator into suede:
-- Moisturize daily. Cream moisturizers are better than lotions for normal to dry skin. People with sensitive skin should choose a moisturizer without fragrance or lanolin.
-- Cleanse your skin, but don't overdo it. It is enough to wash your face, hands, feet, and between the folds of your skin once a day. The trunk, arms, and legs can be rinsed daily, but it is not necessary to use soap or cleanser on these areas every day. Too much cleansing removes the skin's natural moisturizers.
-- Limit the use of hot water and soap. If you have "winter itch," take short lukewarm showers or baths with a non-irritating, non-detergent-based cleanser. Immediately afterward, apply a "water-in-oil" -- type moisturizer. Gently pat skin dry.
http://www
RE: Precipitation of drinking water after boiling
For the "itching skin" after bathing, I believe that is caused by the residue of the combination of water minerals and bath soap, in the water conditioning industry called "Scud". Some complain of itching and some complain of dry skin. It may not be dry skin but it does feel like that. Usually corrected by water softening. Not pitching soft water here. Just 35 years of experience in the industry.
Gary Schreiber, CWS VI
The Purolite Co.
RE: Precipitation of drinking water after boiling