Published by Mahmud Ghasempour, effluent treatment manager at Mahmud
Dear All
We have a wastewater with Total Hardness 3900 , I want know what is the the best solution for Reach to ZLD .
we calculate softening with caustic-soda, but it consumes lots of chemicals and OPEX is too high .
Many Thanks
Investigate a weak solution of sodium hexameta phosphate. We have had brilliant results on hard water.
Published by Richard Holder
Caustic & soda, oply is best option for hardness removal.Increase pH to 11.5 to 12.00 & add soda accourding to jar test.
Published by Dr Pankaj Patidar, Employee at Featured - Fluence Corporation
Lime treatment is the cheapest solution for hardness reduction and ZLD.
Published by Ghulam Mustafa, Team Leader - Agra Water Supply Project at NJS Consultants Japan
one solution use lime softening and EDR achieve near 90% recovery of your waste water
Published by Ali Cheraghi, Mechanic &Process Manager in MD2
If you can mail total water analysis report we can suggest you proper solution.
Published by KUNJESH MALI, MR.
First,use NaCl and Na2SO4 in pH 9 can remove most of the Ca2+,Mg2+,then add Na2CO3 or CO2.Remaining Ca2+ to reduce hardness. Its effect is better and opex is cheaper than caustic etc.
Published by Patrick Zhang, sales manager at Wuhan Qingshuilvyuan Environmental Protection Co.,Ltd
Hi Mahmud, this is Alan Lim from Royal HaskoningDHV (Singapore Office).
I have briefly checked internally and we believe our Crystallization technology can help you. Write back to me at: Alan.lim@rhdhv.com
We have some things to clarify before confirming if Crystallization is the answer you need.
Published by Alan Liovejesus5
Hi Mahmud, you may consider using lime for softening or soda ash (sodium carbonate). These are generally much cheaper than caustic. Feel free to download the STASOFT computer software freely available on the Water Research Commission's website (South Africa). This allows you to select either of the chemicals for precipitation softening (not ion exchange or others such as that suggested by Richard) and gives you the amount required to achieve the level of hardness you want. Inputs are pH, temperature, sodium, calcium, magnesium, chloride, sulphate, TDS and alkalinity.
Published by Ian Pearson
try this url, then search for Stasoft V5. http://search.wrc.org.za/#!/
Published by Ian Pearson
apologies that you could not locate the STASOFT software. You can find it by first accessing the Water Research Commission website, then go to the Knowledge Hub, and then search for STASOFT V5. I will also try to give the programme directly, but I do not think The Water Network will allow it.
Published by Ian Pearson
My mail is qasempur@gmail.com if possible send to this address.Thanks
Published by Mahmud Ghasempour, effluent treatment manager at Mahmud
Tanks a lot for reply .I cannot locate this software too if possible send addressees to qasempur@gmail.com
Published by Mahmud Ghasempour, effluent treatment manager at Mahmud
I cannot locate this software. Could you please post the url. Thank you.
Published by Ahmed Soorma, General Manager at Soorma & Sons
We have some technology at Resourcesxtract that uses magnetic technology that has been successfully in treatment of waster water without chemicals
Published by Richard Koseluk