Hydraulic Loading Rates

Typical hydraulic loading rates on a single-stage filter range from 0.4 to 0.6 MG/ac-d (0.37 to 0.56 m3/m2-d). If the SS in the influent to the filter will routinely exceed 50 mg/L, the hydraulic loading rate should be reduced to 0.2 to 0.4 MG/ac-d (0.19 to 0.37 m3/m2-d) to increase the filter run. In cold weather locations, the lower end of the range is recommended during winter operations to avoid the possible need for bed cleaning during the winter months.

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