Regarding the treatment of wastewater from aluminum anodization.
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The amount of wastewater is not large; there is wastewater from alkali cleaning and acid cleaning, as well as wastewater generated from the use of sodium hydroxide, sulfuric acid, hydrochloric acid, and *ao acid. What method should be used for treatment? Can the precipitate be directly filtered by pressure? . . There is also the issue of phosphorus.
Phosphorus removal should be considered; phosphorus removers and combined alkalis can be used to adjust the pH to 7-8. If the total nitrogen level is not high, filtration under pressure can be carried out after precipitation
Remove phosphorus with iron, and conduct a full analysis test
Sludge can be recycled and reused as a resource!