The wastewater discharged from coal-fired power plants contains large amounts of sulfuric acid; what can be used to treat it before discharge?
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The wastewater discharged from coal-fired power plants contains large amounts of sulfuric acid; what can be used to treat it before discharge?
This post was last edited by shiqin778 on 2016-5-31 10:15: Neutralized with calcium hydroxide, then filtered and discharged. To recycle sulfuric acid, after adsorption by resin, it is neutralized before being discharged
The sulfuric acid in wastewater can only be neutralized and filtered before discharge, as the cost of recovery is too high. Also: Why does the wastewater from thermal power plants contain such large amounts of sulfuric acid? Where does it come from? Many systems operate in an alkaline environment; even if there is acid present, it is mostly salt acid I don’t understand.
I really haven’t heard of any production process that generates large amounts of sulfuric acid. To prevent pipe corrosion, it is not possible to discharge large amounts of sulfuric acid-containing wastewater directly. If it’s sulfate, then it’s possible. If it is indeed a large amount of sulfuric acid that provides acidity, the pH will be very low, and neutralization may be necessary depending on the situation. Regarding recycling, I agree with what was said on the third floor: the cost of concentrated sulfuric acid is very low, so its recycling value is not high; neutralization before discharge is a more appropriate approach.