Salt recovery

Taxonomy

• Textile
• Sludge Separation
• Sludge Treatment
• Sludge Management
• Waste Water Treatments
• Fibers & Textiles
• Sludge Treatment & Management
• Textile

11 Answers

1. Gokul Ragupathi Dear Sir, From your description, it appears that you have a mixture of desired salts contaminated by organic sludge, which is undesired. Thus you are worried about how to remove the undesired organic sludge. 

   In view of the above, I suggest to kindly try to incinerate the whole mixture at high temperature, which will remove the organic part of the sludge, leaving behind the desired organic salts as residue. The salts will survive the high temperature & the organic sludge will burn away. Of course the emissions of the incinerator need to be properly scrubbed to avoid air pollution.  Regards, 

2. the NF+RO, the NF can remove the divalent ion ​salts , and the ​RO can remove ​all the salts ​left.

3. In the context of Bangladesh and ZLD we've been evaluating and mediating three advanced treatment technologies for brine recovery (Glauber and/or normal salt) straight from dye-baths with substantial reduction of colour and TDS whilst totally removing any evaporator costs, reduction of daily expenses for salt particularly in cotton dyeing, heat recovery as well as temperature reduction in the wastewater. Pls. feel free to accept my contact request, in case afore mentioned could represent an altenative option to you or should you generally be interested in more technical, economic and environmental details re the same.

4. I would suggest a conventional method: 

   1. Place the sludge in a chamber in which stirring can be done.
   2. Add some water and stir to obtain slurry.
   3. Add calcium chloride and stir for while. Allow calcium sulphate to settle as precipitate.
   4. remove calcium sulphate as sludge is removed or decant the supernatant now rich in sodium chloride.
   5. The sludge (gypsum) can be used as soil conditioner and solar salt can be obtained from supernatant by solar evaporation. The salt can be used in preparation of animal feed if no toxic matter is present.
   6. Since the end products will be utilisable, the scheme may be financially viable.

    

    

5. Some of them will be removed by caogulation using PAC, DEC and polyelectrolyte. If you succed to have a clear & cororless efluent after the coagulation, then you could treat by membrane nanofiltration followed by Reverse Osmosis membrane system. NaCl cannot be separated easily.

    

6. Please provide more information we may be able to help you. One option is to consider Eutectic Freeze Crystalization 

    

   1 Comment

   1. there will be many salts present in the textile industry salt recovery. we want to separate sodium chloride and sodium sulfate from the recovered salts

7. http://www.freepatentsonline.com/4242312.html

8. Do you want to separate sodium chloride and sodium sulfate from the sludge, or do you want to separate sodium chloride from sodium sulfate?  If the latter use nanofiltration.

   1 Comment

   1. I want to separate sodium chloride and sodium sulfate from the sludge 

      Also want to separate sodium chloride and sodium sulfate 

9. What are the other components present in this water ? Are there organics ? If yes, how much as the reverse osmosis may not support it.

   What are the concentrations ? If low, electrodialysis can also be looked at.

10. Reverse osmosis is an excellent option.

    1 Comment

    1. reverse osmosis will remove the salts not separate them.

       1 Comment reply

       1. the NF+RO, the NF can remove the divalent ion salts , and the RO can remove all the salts left.

11. the only process i can suggest is Evapo-concentration.

    www.kmu-loft.com

    https://www.kmu-loft.com/products/pre-and-finishing-treatment/

    1 Comment

    1. I want so separate sodium chloride and sodium sulfate sir,