Which is more difficult to treat, ammonium chloride and sodium chloride wastewater?
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All are at concentrations of around 10 percent; from the perspective of electrodialysis or multi-effect evaporation, which method is better for treatment? Lower processing costs?
Relatively speaking, sodium chloride is easier to handle, while ammonium chloride presents the issue of ammonia recovery.
It seems that sodium chloride isn’t under control and can be discharged directly
At this concentration, there’s no difference unless it evaporates
At concentrations in the teens, whether it’s ammonium chloride or sodium chloride, it seems unnecessary to use electrodialysis; evaporation is sufficient. Depending on the costs of water, electricity, and steam in the user’s case, one can decide whether to use a multi-effect system or an MVR system to finally obtain salt through crystallization. If the poster wants to learn about the evaporation crystallization process, they can send the parameters of the wastewater to my email address; I will provide them with a complete evaporation crystallization solution. Email: 3225774384@qq.com
A salt concentration of over 10 percent, whether it is ammonium salts or sodium salts, is difficult to handle. If there is an ion-exchange membrane caustic soda plant in the vicinity, it is possible to try using sodium chloride wastewater as the dissolving water for the primary brine, but impurities and organic substances need to be taken into consideration. Ammonium chloride used to be used as a fertilizer, but it is unlikely that anyone will want to use it now, as chloride ions are a factor that causes soil salinization.
Ion-exchange membrane caustic soda seems to have quite high requirements regarding water quality. Can sodium chloride be completely removed after electrolysis?