1. The volume of zinc containing sludge (with a moisture content of 99.7%) in electroplating wastewater can be determined based on 4% -8% of the treated wastewater volume.

2. The zinc ion content in wastewater should not exceed 50mg/L

3. The agent can be added to the mixed flocculation time for 5-10 minutes.

4. After treatment, the cleaning water can be recycled, but attention should be paid to updating the treated water volume with fresh water applied daily by 10% -15%.

5. The optimal dosage for adding basic aluminum chloride is 15mg/L (calculated by aluminum ions).

6. The pH value of wastewater should be controlled between 8.0 and 9.0 when adding mixed flocculants.

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