According to the acid concentration, substances, suspended solids, other impurities and water purification requirements, the corresponding measures can be taken, such as:
1. Treatment of acidic water containing iron carbonate and ferric sulfate should be carried out by aeration in a graded gas column, clarification by a horizontal sedimentation tank, or treatment with lime, aeration in a staged mixing tank, coagulation and precipitation. It is also possible to add lime to the vertical mixer and then add a coagulant to the flocculator to clarify.
2. For the treatment of iron-containing acidic water with high suspended solid content, it can be treated with lime, spray aeration, mesh screening, coarse filtration in sand pond, coagulation, sedimentation, filtration and disinfection. Or treatment with lime, spray aeration, mesh screening, sand preprecipitation, electrocoagulation, precipitation, rapid filtration, exposure disinfection.
3. Treating the acidic waste water with different concentrations of, in particular, containing heavy metals and impurities more acidic waste water, the basic substance may be added to the lime, carbide slag, etc., to neutralize the acidic waste water. When lime is introduced, calcium hydroxide has a cohesive effect on wastewater impurities and is a common method. However, this method has poor labor hygiene conditions, difficult operation and management, difficulty in dehydration and high cost.
4. For the acidic sewage with less oil and salt and less acid concentration, the filtration neutralization method can be adopted.
5. If there are two kinds of alkali acid wastewater in a mine, the two kinds of wastewater can be mixed and neutralized. Suitable for treating different concentrations of acid and alkali wastewater.
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