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Secondary treatment is to remove degradable organic substances and some colloidal pollutants in wastewater by biological treatment and some chemical methods
Published on:
2022-11-15 16:31
The secondary treatment is to use biological treatment and some chemical methods to remove the degradable organic substances and some colloidal pollutants in the wastewater. After the secondary treatment, the removal rate of BOD in the wastewater can reach 80%~90%, that is, the content of BOD can be lower than 30mg/L. The water after the secondary treatment can generally meet the agricultural irrigation standards and wastewater discharge standards, so the secondary treatment is the main body of wastewater treatment.
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