Table 7302 Chlorine Dosages For Waste Treatment Plant Effluents

Approximate Dosage*

Type of Treatment (mg/1)

Primary plant effluent 20 to 25

Trickling filter plant effluent 15

Chemical precipitation effluent 15

Activated-sludge plant effluent 8

Sand filter effluent 6

Note: *Dosages vary from plant to plant and are those required to produce 0.5 to 1.0 mg/l combined residual chlorine after 15 min.

cause the organic matter in the waste exerts an immediate chlorine demand. Table 7.30.2 lists the dosages required to produce a residual of 0.5 to 1.0 mg/l.

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