Hi Mr. Zolal:The recommended ...

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Hi Mr. Zolal: The recommended air to solids ratio is 0.75 kg of air per 1 kg of dry solids. If your TSS is 50 mg/L - you would have 20,000 m3/day x 50 mg/L /1000 = 1000 kg of dry solids/day. Therefore, you would need to design your air blower system to deliver 750 kg of air/day.