Why does the water coming out of the alkali injector turn yellow during regeneration?
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Why does the water from the alkali injector turn yellow when the desalination system is regenerated in the first-level retest, and the color of the water from the acid injector is normal?
Is the equipment not anti-corrosion equipment? Directly using iron?
If iron ions are suspected, the equipment or materials may be too dirty, or the materials may be in contact with steel, or items may be left behind during maintenance. Or there may be a problem with the material composition itself. I have seen caustic soda turn red and the prepared alkali solution turn red.
Or the alkali tank is made of carbon steel and has been corroded, rusted, etc.