Your plant shows a BOD concentration of 47 mg/L with a discharge of 1.28 MGD. What is the daily discharge quantity of BOD in pounds?

Your plant shows a BOD concentration of 47 mg/L with a discharge of 1.28 MGD. What is the daily discharge quantity of BOD in pounds?

• A. 450 lbs/day
• B. 502 lbs/day
• C. 530 lbs/day
• D. 560 lbs/day

Answer: (B)

To find the daily discharge quantity of BOD in pounds, the calculation involves using the following formula: \[ \text{BOD (lbs/day)} = \text{BOD concentration (mg/L)} \times \text{flow rate (MGD)} \times 8.34 \] In this scenario, the BOD concentration is 47 mg/L, and the flow rate is 1.28 MGD. The factor of 8.34 is used to convert the concentration from mg/L to pounds per day, considering that 1 mg/L of a substance in 1 million gallons of water equals 8.34 pounds. Using the provided values: 1. Multiply the BOD concentration by the flow rate: \[ 47 \text{ mg/L} \times 1.28 \text{ MGD} = 60.16 \text{ mg/day} \] 2. Now, multiply this result by 8.34 to convert to pounds: \[ 60.16 \text{ mg/day} \times 8.34 \text{ lbs/mg} = 502.67 \text{ lbs/day} \] Rounding this gives approximately

To find the daily discharge quantity of BOD in pounds, the calculation involves using the following formula:

[

\text{BOD (lbs/day)} = \text{BOD concentration (mg/L)} \times \text{flow rate (MGD)} \times 8.34

]

In this scenario, the BOD concentration is 47 mg/L, and the flow rate is 1.28 MGD. The factor of 8.34 is used to convert the concentration from mg/L to pounds per day, considering that 1 mg/L of a substance in 1 million gallons of water equals 8.34 pounds.

Using the provided values:

1. Multiply the BOD concentration by the flow rate:

[

47 \text{ mg/L} \times 1.28 \text{ MGD} = 60.16 \text{ mg/day}

]

2. Now, multiply this result by 8.34 to convert to pounds:

[

60.16 \text{ mg/day} \times 8.34 \text{ lbs/mg} = 502.67 \text{ lbs/day}

]

Rounding this gives approximately