Alkali slag treatment
Thread Content
After wet oxidation, the wastewater meets the discharge standards; however, its salt content is relatively high, at around 100,000 mg/L. The main components are sodium chloride and sodium sulfide. An economical and practical method is needed to reduce this salt content to around 1,000 mg/L
There is no ideal method for removing salts; evaporation crystallization or membrane concentration are used. For materials with complex compositions, multi-effect evaporation or MVR is generally employed, although the latter is not as simple and reliable to operate as the former.
Electrodialysis is more suitable for this, and crystallization evaporation is also appropriate.