Can resin-regenerated high-salt wastewater be reused?
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Can the high-salt wastewater generated during resin regeneration be reused? It seems it’s not possible, but I don’t know why. Does anyone who knows know? Recently, we have been checking the salt content, and we have started using wastewater from resin regeneration. So far, it seems to have no adverse effects on the resins; could those who are knowledgeable please explain any potential drawbacks?
Recently, the government has been monitoring salt levels, and we have started using wastewater from resin regeneration. However, so far, it seems to have no adverse effects on the resins. What does this mean?
Study the effects of high-salinity water carefully and you’ll find the answer?
I know that; it involves replacing the calcium and magnesium ions in the resin with sodium ions. Our company currently reuses the regenerated brine, then adds salt and water to saturate it before using it again. Does water hardness have an impact on the activation of the resin? At present, it has no impact on the resin regeneration time. Could you please explain the principle in detail? Thank you
I know that; it involves replacing the calcium and magnesium ions in the resin with sodium ions. Our company currently reuses the regenerated brine, then adds salt and water to saturate it before using it again. Does water hardness have an impact on the activation of the resin? At present, it has no impact on the resin regeneration time. Could you please explain the principle in detail? Thank you
Are you referring to the regeneration of softened resin? If it is a softening resin, no problems will be apparent in the short term, as such resins are usually strong-acid cation resins that exhibit greater selectivity for calcium and magnesium ions compared to sodium ions. Since you have just started using this resin, the amount of calcium and magnesium ions released during elution is not yet high. As long as the concentration of sodium ions remains high enough, the resin can be regenerated. However, as the number of regeneration cycles increases and the concentration of calcium and magnesium ions in the regeneration solution keeps rising, the regeneration efficiency will decline, and the hardness of the water output will increase until it fails to meet the required standards. Unless the regeneration solution from the subsequent stage is retained each time it is regenerated, the amount of calcium and magnesium ions in it will be much lower. It can be used in the pre-regeneration stage of resins. There is no problem with this.
Are you referring to EDI? If regeneration is carried out continuously with high-salinity water, the levels of calcium and magnesium in the regeneration solution will increase over time! Just to cope with environmental inspections in the short term! High-salt wastewater still needs to be discharged in quantified amounts!
It can be used directly as circulating water
The high-salinity water resulting from the regeneration of softened resin can be filtered and purified for reuse.
What is the purpose for which the water you produce is used? Could alternative methods be considered to replace the resin tanks? There are many glass factories in our area, and the issues related to resin tanks need to be addressed urgently. The water produced by their resin tanks is mainly used for replenishing circulating water, and electrochemical descaling equipment is currently being used to replace the resin tanks. If you are interested. We can have a conversation. My WeChat phone number is 15028870590
That’s correct; the regeneration liquid can be precipitated to remove calcium and magnesium, after which the process can be repeated