What is the chemical feed rate to obtain a 4 mg/L dose in a 5 MGD flow?

What is the chemical feed rate to obtain a 4 mg/L dose in a 5 MGD flow?

• A. 15.6 days
• B. 375 days
• C. 6.25 days
• D. 9000 days

Answer: (C)

To determine the chemical feed rate required to achieve a specific concentration in a defined flow rate, you need to consider the relationship between flow rate, dosage concentration, and the total amount of the chemical needed. In this scenario, the desired concentration is 4 mg/L, and the flow is 5 million gallons per day (MGD). To find the daily dosage, you can use the formula: \[ \text{Daily Dosage (mg/day)} = \text{Flow (MGD)} \times \text{Dosage (mg/L)} \times 3.78541 \text{ (to convert MGD to Liters)} \] First, convert the flow from MGD to liters per day: \[ 5 \, \text{MGD} = 5 \times 3.78541 \times 10^6 \, \text{L/day} \approx 18,925,050 \, \text{L/day} \] Next, calculate the daily dosage: \[ \text{Daily Dosage} = 18,925,050 \, \text{L/day} \times 4 \, \text{mg/L} \] \[ \text{Daily Dosage} =

To determine the chemical feed rate required to achieve a specific concentration in a defined flow rate, you need to consider the relationship between flow rate, dosage concentration, and the total amount of the chemical needed.

In this scenario, the desired concentration is 4 mg/L, and the flow is 5 million gallons per day (MGD). To find the daily dosage, you can use the formula:

[ \text{Daily Dosage (mg/day)} = \text{Flow (MGD)} \times \text{Dosage (mg/L)} \times 3.78541 \text{ (to convert MGD to Liters)} ]

First, convert the flow from MGD to liters per day:

[ 5 , \text{MGD} = 5 \times 3.78541 \times 10^6 , \text{L/day} \approx 18,925,050 , \text{L/day} ]

Next, calculate the daily dosage:

[ \text{Daily Dosage} = 18,925,050 , \text{L/day} \times 4 , \text{mg/L} ]

[ \text{Daily Dosage} =