Is It feasible to drain waste water of RO plant having 5000 ppm TDS to bore having depth of 100 ft where already TDS is higher t
Submitted by pankaj joshi on February 7, 2010 - 13:30
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1. RO reject water into borewell
It is absolutley NOT recommended to do that. You will permanently damage the aquifer if you put R.O rejects with such high salinity in it.
Put in place a salt recovery system using evaporation techniques
zenrainman
2. You can not use RO reject, as
You can not use RO reject, as also effluent from STP, for GW recharge. That has been already replied many times in the IWP. However the question remains, how do you then dispose it off. I am afraid there is no satisfactory solution to this problem.
zenrainman has suggested evaporation pens where the water is evaporated, by solar heat of course, leaving behind solid salt. I do not want to be seen as if opposing that, but (and apart from the practical aspects of actually implementing it) the question still remains, how do you then dispose off the salt. If you dispose it in your solid waste, it will end up in the city waste dump, from where it will leach back in to the aquifer.
All problems do not necessarily have an entirely satisfactory solution, and this is one such. Relatively, it may be best to let it flow in the surface drains or sewage to eventually meet the river. This should NOT be construed as if I am approving disposal of high TDS water in the river. But, of all the possible options, this could be the least evil.
Chetan Pandit
3. drain waste water of RO
Dear Mr Paknkaj Joshi,
Your question of feasibility to drain waste water of RO plant having 5000 ppm TDS to bore having depth of 100 ft where already TDS is high- only f the bore well water has a TDS of more than 5000 ppm-(which seems to be highly improbable situation) would it be advisable - in all other cases it is advisable to recover the salt by simple evaporation as suggested by zenrainman.
By putting this RO water in the bore well you will cause not only saline water conditions in the aquifer, but will also land up creating soil salinity problems in the shallow soil zone., long term effects could be a formation of hard salt pan and water logging, etc.. and a total break down of the natural ecosystem.
Dr. Anil LAlwani
www.wellwaterworks.com
4. Dear Pankaj Joshi, In my
Dear Pankaj Joshi,
In my opinion, it is not good to drain the RO waste water to the bore, as bore water is already high in TDS. Thus in spite of dilution, bore well water will have high TDS.
Regards
Leela Iyengar
Advisor
Arghyam
Bangalore
5. R.O. REJECT WATER.
Dear Pankaj,
Kindly tell me what is the source of your feed water to R.O. and weather you have got the water sample of your borewell analysed or you are just guessing that the TDS of the water is more than 5000 PPM. In my opinion you should not drain the R.O. reject water directly in the borewell as the reject of R.O. will have quality of water different than that of your aquifer. However if there is not any noticable difference than you can dispose this water through recharge pits but you should avoid the direct draining of water into borewell.
regards
AMIT KR. SINGH,
GOVT. OF HARYANA,
PUBLIC HEALTH ENGG. DEPARTMENT,
WATER TESTING LAB,KARNAL-132001(HARYANA)
09416204204,09729248248,
ak_ranaji3@yahoo.co.in
6. Dear Pankaj Joshi, Reject
Dear Pankaj Joshi,
Reject management is a problem in case of toxic contaminants. We are facing such problem in Assam in case of Arsenic and Fluoride. RO effluents may cause damage to the aquifers; one should not drain directly to a bore well. Perhaps dilution will be the most effective option before disposing it to any place. The same may be disposed in septic tank, sewerage line, very large surface water course like river or even may perhaps be used in construction site.
With regards,
Diponkar Bordoloi
Assistant Engineer
Public Health and Engineering Department (PHED)
Guwahati, Assam
7. Dear Pankaj, It is not
Dear Pankaj,
It is not feasible and should not be done either as it violates pollution control laws in our country and also those of most individual states.
Water containing such a high TDS can not be discharge until is treated to reduce the TDS. Besides, draining the high TDS water into a water which already contains a higher TDS will, over time increase the TDS level in the acquifer that feeds the bore well. Any other well that drilled to tap into this acquifer will get water that can not be used for any thing.
Whoever it is that has raised this query should be advised to do rain water harvesting to recharge the water in this well.With this it is possible that the water quality in the well can improve and also see a TDS reduction.
With regards,
S.S. Ranganathan
Advisor
Ion Exchange
Bangalore