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Optimal Water Purification Technique - Test Report Attached: Ongole, Andhra Pradesh

                I am from Ongole, Andhra Pradesh. Find attached a test report of ground water from my premises. I plan to construct an apartment & use the groundwater as the primary source of waterfor purposes other than drinking. Atleast 15 families are to be provided for and the water purified to cater to the needs as mentioned above (bathing, washing etc). Kindly go through the test report and suggest what would the optimal solution for the same. No alternate water sources are currently available. Suggestions regarding cost & efficiency in the long run are welcome. Contact information of consultants who are able to tackle this will also be welcome.

Vishwa

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1. OPTIMAL WATER PURIFICATION TECHNIQUE.

Dear RV,

As per the test report attacheh by you your water is not fit for construction (as per IS456:2000) as well as drinking purpose(as per IS10500:1991). The only method is demineralisation followed by Reverse Osmosis filteration as the TDS is very high.You should contact Ion Exchange dealers for the solution.

regards.

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

2. Optimal purification technique for your bore well water.

Dear Mr.Viswan,

I have seen the very brief bore well water analysis of your well water.It has a Total Dissolved Solids content in excess of 11000ppm(just under 12000ppm).It is not possible to purify this water economically.

The only method that can purify this water is Reverse Osmosis(RO) desalination with special SWR membranes(i.e membranes used to treat sea water).Even if you can afford to install an RO plant,the running costs will be phenomenally high.The worst thing is the waste water which is produced by the RO will have an extremely high TDS level which cannot be disposed off in any way.

My advice to you would be to see if an alternative supply of water is available with a TDS level that is less than 1000ppm and if it is,use that source even if it means bringing it in by tankers.

If you want you can call me on 09343734229 and discuss it with me.

 

S.S.Ranganathan

3. Disposal of impure water

Dear Mr.Ranganathan,

I am wondering if disposing the impure water(with very high TDS from RO plant) into corporation/municipality drainage system is not a feasible solution? Is there any known drawback to this solution?

Thanks,

Ashok

 

4. Disposal of 'impure' water

Calling waste water from an RO desalination plant handling an input water with a TDS as high as 12000ppm as ' impure' would be a major understatement.The waste water technically called as ' reject' water would have a TDS close to that of seawater.Disposal of such water in a city's sewarage system is not a solution, but an offence as per existing pollution control laws.Any state pollution control board would insist on such water being re-cycled and not discharged anywhere.The only way such waste can be handled is by thermal evaporation.

S.S.Ranganathan

5. Disposal of Reject water from RO

Forgive my ignorance sir,

1. But I do not understand what danger this reject water might pose to the drainage/sewage system when all of it ends up in the sea as in Chennai and other places. Adding some 'seawater like' high TDS water to the sea should not be a big deal, right? Or does the drainage/sewage water serve some purpose that this reject water might ruin?

2. Further more, the reject water cannot be hazardous than what's already running in sewage already(domestic wastes, chemicals, etc.). Can it?

curiously,

Ashok

6. Disposal of Reject Water From RO

Hi,

The subject matter has been discussed on the forum earlier, on a number of occasions.

Kindly go through the same here:

http://indiawaterportal.org/ask/5681

http://indiawaterportal.org/ask/5689

http://indiawaterportal.org/ask/5559

http://indiawaterportal.org/ask/5328

Accessing the earlier discussions will provide a good idea regarding the current levels of information & debate regarding the same.

 

7. Disposal of RO reject water.

My thanks to iwp for posting the 4 useful links related to earlier questions on this subject.I would suggest that Ashok read them.None of them can be misunderstood to mean that it is OK to dispose of RO reject any how!

India pumps millions of litres of untreated waste water into the sea.This does not make it right.After all, we also eat the fish caught in these very same polluted seas.

Having spent several decades dealing with industrial use of water,I can say that industries are now being directed by pollution control boards of the various states that they can not dispose of waste water,but instead re-use it.This is called the Zero discharge concept and industries have to conform.

Domestic users of water are not an exception.At least in Bangalore where I live, builders of housing/commercial complexes have approached me to find out why the KSPCB has issued strict norms on disposal of waste water.The quality of waste water that can be discharged is so 'tight' that the cost of purifying it will be so high as to make it viable/essential to re-use it.

It is far better in the long run to protect water sources from degradation than to spend large sums of money to purify the water.The waste will ultimately come back to poison the users!

S.S.Ranganathan

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