Control of organic acids in raw water
Control of organic acids in raw water
(OP)
Can anyone tell me if the Sodium Hypoclorite destroys the organic acids present in raw water (source = water dike) and then retained in a sand/anthracite or an activated carbon filter.





RE: Control of organic acids in raw water
I don't think the C in the HO-C=O would have an affinity for substitution either. You would need some agressive oxidation. Maybe ozone or peroxide.
But if you do modify the acid activated carbon may not be effective if the organic remains polar. And sand work best with solids in solutions. I'll try to look into this some more. Very interesting problem. Give me some feedback.
RE: Control of organic acids in raw water
A brief description of our water system is the following:
We receive the raw water directly from a surface water supply and we have problems with algae, silica and organic acids.
The water is introduced into a pond and then pumped to the filtration unit. Immediately after the pump we dose Sulfuric acid for pH adjustment, alum as coagulant, Sodium Hypoclorite as biocide and a commercial polyelectrolite as flocculant trying to do an inline clariflocculation. In this condition the water passes thru eight sand/anthracite filters, next goes to a reservoir tank (we will try to dose additional Sodium Hypoclorite before entering the tank so as to get 1 - 1.5 ppm at the exit.) Then the water is pumped in to directions. One goes directly to the Cooling Water make-up and the rest (approx 190 m3/hr) goes to a clariflocculation unit with additional dosing of coagulant and flocculation chemicals. After that the water passes thru another sand/anthracite filtration unit, we dosify sodium bisulfite to eliminate chlorine and then we have the demineralization plant.
Our intention is to include and Activated carbon unit after the second sand filters unit to eliminate excess chlorine and mechanical filters with 3 microns mesh before de demin water unit.
I am very interested in your comments about the use of ozone or peroxide but am aware about which will be the effect on the cation resins in the demineralizer and capital and operating costs.
Which would be your advise on where should we introduce them to succeed in eliminating the organic acids(maybe fraction of Humic and Fulvic acids formed from decaying vegetation)and where or how retain them.
thanks in advance.
You can also reach me at: jbertoni@prefertil.com.ar
RE: Control of organic acids in raw water
I'll try to look into this some more.
RE: Control of organic acids in raw water
The chorine to carbon loading is low. You will be using alot of carbon with a cost increase for disposal.
RE: Control of organic acids in raw water
¿ Any comments ?
RE: Control of organic acids in raw water
RE: Control of organic acids in raw water
RE: Control of organic acids in raw water
I think I'm getting of the track here, and I don't want to drift away from the original question. Let me know where you stand.