Hi Solmaz. Your question ...

Hi Solmaz.

Your question don't has a quick response. Firstly, you have to consider some points to define wich treatment fits properly to your water.

In my opinion, some of these points are the followings:

- Which kind of pollutants have you in your water? If they are apolar, without electrical charge, one EDI-EDR is useless, because that treatment works based on the attraction of the particles and its removal by their electrical charge. For example, if your main pollutant is silk, you will waste your money with the best EDI-EDR system but you won't remove anything.

- If your pollutant are electrically charged particles. Which kind of charge do you have? Depends on the size of the molecule and/or its charge, it is possible that you could use a nanofiltration. RO remove all sized particules but sometimes are not needed such an aggressive process, and you can use a nanofiltration. The principle is the same, the pass through a semipermeable membrane, but in this situation, the cut is optimized to "big" molecules or divalent ones. If your main pollutant is SO4=, you can use this technology, that has a bit cheaper installation, but its clearly cheaper in its exploitation, becaouse it needs lower pressures than RO and therefore, less energy.

- How big is your flow needed to supply? And the inlet stream flow? Consider that an EDR can have a conversion rate about 50% of inlet stream while RO conversion rate is among 65-80%.

- Do you have enough energy for this systems? Which kind of energy do you have? Electricity?Thermal one? Biomass? Its cheaper in your situation boil water than apply a high pressure?

- To end, have you consider other technologies as Forward Osmosis? It's a recently developed (