if the raw water out of treatment plant needs a lime dose of 11 1/2 mg perL determine the setting on the line feeder in pounds per day when the flow is 2,500,000 gallons daily

To determine the setting on the lime feeder in pounds per day, we first need to convert the dosage requirement from milligrams per liter (mg/L) to pounds per day based on the flow rate in gallons per day.

### Step 1: Convert gallons per day to liters per day
There are 3.78541 liters in a gallon. Given the flow rate is 2,500,000 gallons per day:

\[
2,500,000 \text{ gallons/day} \times 3.78541 \text{ L/gallon} = 9,463,525 \text{ liters/day}
\]

### Step 2: Determine the required lime dose in milligrams per day
The required lime dose is given as 11.5 mg/L. Therefore, the total amount of lime required in milligrams per day is:

\[
9,463,525 \text{ L/day} \times 11.5 \text{ mg/L} = 108,820,537.5 \text{ mg/day}
\]

### Step 3: Convert milligrams to pounds
There are 453,592.37 milligrams in a pound. To convert the lime dosage to pounds per day:

\[
\frac{108,820,537.5 \text{ mg/day}}{453,592.37 \text{ mg/pound}} = 240 \text{ pounds/day}
\]

### Final Answer:
The lime feeder should be set to **240 pounds per day**.

Would you like any details or have any other questions?

Here are five related questions:
1. How do changes in flow rate affect lime dosage?
2. What is the impact of using different water treatment chemicals?
3. How is lime dosage typically monitored in treatment plants?
4. What safety measures are required when handling lime in water treatment?
5. How is the efficiency of lime dosing in water treatment assessed?

**Tip:** Always ensure flow rates and chemical dosages are periodically checked to maintain optimal treatment levels.

If the raw water out of the treatment plant needs a lime dose of 11 1/2 mg per L, determine the setting on the lime feeder in pounds per day when the flow is 2,500,000 gallons daily.

Discover how to calculate the lime feeder setting in pounds per day for water treatment plants. This example uses a flow rate of 2,500,000 gallons daily and a lime dose of 11.5 mg/L, demonstrating key steps like unit conversion and dosage calculation. Ideal for students in Grades 10-12.

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