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Suggesting Suitable Treatment Method: Sample Characterization Provided

Please suggest a suitable treatment for the following characterized Bore well water sample for a apartment for domestic purpose.

TDS : 4600 ppm

Hardness : 1150 ppm

Calcium : 244 ppm

Magnesium : 906 ppm

Iron : 0.05 ppm

Kindly give details regarding what method of treatment should be adopted. End use will be for domestic use in a single apartment. Information regarding costs of treatment options will also be welcomed.

Shantha

guna_lokesh@yahoo.co.in

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Comments

1.

Dear Shantha,

The TDS level of 4600 ppm can only be treated with Reverse Osmosis desalination. However, the cost would run into several lakhs of rupees for a plant to treat just the water requirement of a single apartment.

My advice would be to locate a better source of water with a TDS level not exceeding 1000 ppm as this would be more economically viable to treat. Also, it would be better for all the residents in all the apartments in the building to participate in going for suitable treatment as it would be more economical.

Regards

S.S.Ranganathan
Advisor
Ion Exchange
Bangalore

2.

Dear Ms. Shantha

The analysis confirms that water is brackish & is not at all suitable for Domestic use.

Only solution is to install RO plant

50 lph plant for a family of 5 person will generate around 1000 l in 20 hr operation. Water requirement for 5 persons will not be more than 750 l/day
The only draw back will be wasting of 50 to 60 % of water as reject. You can use reject for flushing the toilets or for the gardening.

Prof. R. V. Saraf
Director
Viraj Envirozing India Pvt. Ltd.
21 Radhakrishna, Near SBI Maid Road, Pune 38
watersgs@vsnl.net
website http://www.virajenvirozing.com

3.

Dear Shantha,

Presented report on bore well water characteristics shows that TDS and Hardness are very high. Most of domestic RO systems generally give a maximum limit for TDS in feed water to be around 2000mg/L.

Further, with such high hardness, one will have to go in for pretreatment for its removal prior to RO treatment. RO system itself costs around Rs15, 000-25,000. Cost of Pretreatment cartridges will have to be added to this. Maintenance cost includes periodic replacement of cartridges and RO membrane itself.

Regards

Leela Iyengar
Advisor
Arghyam
Bangalore

4.

Dear Shantha,

As the TDS of your borewell is very high, you should go for Reverse Osmosis Treatment. At such high TDS commercial R.O. will work.

Regards,

AMIT KR. SINGH,
CHEMIST,
P.H.E.D. WATER TESTING LAB,
KARNAL-132001, HARYANA
09416204204
ak_ranaji3@yahoo.co.in

Amit Kr. Singh,
Govt. of Haryana,
Public Health Engg. Department,
Water Testing Lab,Karnal-132001(haryana)
09416204204,09729248248,
ak_ranaji3@yahoo.co.in

5.

Dear Shantha,

Your water sample is not fit for drinking as per IS:10500. Water sample has mineral contaminants beyond permissible limits. There are many conventional processes for treatment of such water. But the problem is that end user in your case are residents of apartments, who may not have technical and Operational & Maintenance expertise.

I think you should opt for packaged treatment plant available in the market. Reverse osmosis may be the best treatment process for your case. These types of plants are manufactured by many companies in India. Conventional process may not be suitable in your case.

With regards,

Diponkar Bordoloi
Assistant Engineer
Public Health and Engineering Department (PHED)
Guwahati, Assam

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