Three Bottom Sections: Finding the Dose

To find one bottom section of a three-part wheel, multiply the other two, then divide the top by that result.

Dosage / Feed at 100% PurityTap a section to cover the quantity you want to find.

What remainsDose = Feed ÷ Flow ÷ Factor

1
Identify unknown
Dose
2
Choose wheel
Dosage / Feed at 100% Purity
3
Place values
Feed: 50.04 lb/day · Flow: 1.5 MGD · Factor: 8.34
4
Cover unknown
Dose is a bottom section. Multiply the other two bottom sections (1.5 × 8.34 = 12.51), then divide the top by that result.
5
Solve
50.04 lb/day ÷ 12.51 = 4 mg/L
6
Check units
The answer is in mg/L, the units of the Dose section.

This wheel uses a 100% purity example. A lower-purity product needs the full purity adjustment in Dosage & Feed.

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Lesson 7

To find one bottom section of a three-part wheel, multiply the other two, then divide the top by that result.

Dosage / Feed at 100% PurityTap a section to cover the quantity you want to find.

What remainsDose = Feed ÷ Flow ÷ Factor

1
Identify unknown
Dose
2
Choose wheel
Dosage / Feed at 100% Purity
3
Place values
Feed: 50.04 lb/day · Flow: 1.5 MGD · Factor: 8.34
4
Cover unknown
Dose is a bottom section. Multiply the other two bottom sections (1.5 × 8.34 = 12.51), then divide the top by that result.
5
Solve
50.04 lb/day ÷ 12.51 = 4 mg/L
6
Check units
The answer is in mg/L, the units of the Dose section.

This wheel uses a 100% purity example. A lower-purity product needs the full purity adjustment in Dosage & Feed.