Iron and manganese in ground water
Iron and manganese in ground water
(OP)
Has anybody had any dealings with a company in San Francisco called 'World Construction Company'? I'm wanting information on their ground water filter media high contact oxidation membrane. Can anybody recommend it?
Thanks, Ross Douglas, New Zealand.
Thanks, Ross Douglas, New Zealand.





RE: Iron and manganese in ground water
RE: Iron and manganese in ground water
Prof. Bill Knocke at Virginia Tech also has done work in this area.
Geo Clifford White's Handbook of Chlorination and Alternative Disinfectants, Chap 12 (wiley Interscience, New York, 1999) has a discussion of ClO2 for manganese removal, along with pretty good references. Its available from the American Water Works Association Bookstore (www.awwa.org)
AAR
RE: Iron and manganese in ground water
Regards
Andrew Y
RE: Iron and manganese in ground water
RE: Iron and manganese in ground water
RE: Iron and manganese in ground water
RE: Iron and manganese in ground water
RE: Iron and manganese in ground water
- is your water quality consistent
-do you have interferring gases such as carbon dioxide or hydrogen sulphide.
-what is your ph range
-what is the iron and manganese level.This is important as some of the methods suggested such as oxidation will not achieve high removal if iron content is high as the oxidants will tend to react with iron forst leaving the more stable manganese.
- What quantities are you dealing with.
Iam based in New Zealand and my experience so far is that you need pilot tests before you decvide on which method to embark on. You can contact me and we can share notes on selection criteria.
RE: Iron and manganese in ground water
RE: Iron and manganese in ground water
Ihave a case concerning water treatment of a small community. It is need to remove the ions of the Iron and Manganese from drinking water, engaging greensand pressure filters method. There are two main water streams, which are gathered in one collection tank that will feed two filters, with the following characteristics:
Total Flow rate : 70m3/hr
Iron : 0,4 ~1,4 ppm (depending on season)
Manganese : 0,01~ 0,02 ppm (depending on season)
pH : ~7,5
I have proposed the construction of two pressure filters, working in parallel, with dimensions of: D=2m, H=2m (seem to seem) with filter velocity 11,5 m/hr each, which will be washed and rinsed .
The dosage of the chemicals, follows as :
Cl2 = 0,85 ppm
KMnO4 = 0,57 ppm
Waiting on your advise accordingly to your experience the best way of monitoring and dosage adjustment of the chemicals, taking into consideration the alteration of the concentration of Iron and Manganese during seasons turns.
Also inform us if the KMnO4 is hazardous for human health when the dosage exceeds its normal rates, due to false adjustment of working personal.
RE: Iron and manganese in ground water
Seán
www.expertise-limited.co.uk
RE: Iron and manganese in ground water
lso have anyone used BIRM with preliminary aeration of water? Is there any background on this technology?
Thank you in advance.
RE: Iron and manganese in ground water
Seán
www.expertise-limited.co.uk
RE: Iron and manganese in ground water
Please respond at the earliest
RE: Iron and manganese in ground water
yes that will work, but depends heavily on the process design.
BobPE
RE: Iron and manganese in ground water
Seán
www.expertise-limited.co.uk
RE: Iron and manganese in ground water
Some of my competitors proposed the use of just an oxidtation with air and pressure multimedia filtration in order to remove the consentrations of Iron and Manganese.
Total Flow rate : 70m3/hr
Iron : 0,4 ~1,4 ppm (depending on season)
Manganese : 0,01~ 0,02 ppm (depending on season)
pH : ~7,5
Have anyone heard about this mehod?
Also can I use just gas-liquid dispersion system "Statiflo" prior to multimedia filter in order to oxideze the Ions and in continuance presipitate them in multimedia filter.
RE: Iron and manganese in ground water
hope my reply of a value
if u have further question just ask.
RE: Iron and manganese in ground water
Iron level 47ppm Manganese 4ppm
Also what are the other advantages disadvantages of both
RE: Iron and manganese in ground water
To answer your question, Chlorine has a Stoichemic dose of 0.63 for Fe and 1.29 for Mn. KMnO4 has a dose of 0.94 for Fe and 1.92 for Mn. These doses are the parts of Cl2/KMnO4 needed for 1 part of Fe/Mn.
If you use Cl2 for oxidation of Fe, you will need a total of (47*0.63) or 29.61 mg/l of Cl2. If KMnO4 is used to oxidize the Mn you will need (4*1.92) or 7.68 mg/l of KMnO4.
My experience has been that Mn is hard to treat; however, when the Fe/Mn ratio is 10:1 or better, the Mn co-precipitates out with the Fe on a relatively easy basis. I have not had iron levels as high as yours however.
Both will oxidize the metals; however, because of the higher cost for KMnO4, chlorine is more economical to use. It's drawback is the slow precipitation of the Mn. The KMnO4 has a higher oxidation rate (just a few minutes). Both may require pH adjustment dependent upon your water characteristics.
Cl2 will precipitate the Mn; but, at your high levels KMnO4 may be needed to make the plant smaller and less costly. I would plan for it as the costs involved are low (metering pump, storage tank, and mixer).