What is the organic loading in lbs per 1,000 cu/ft given a flow rate of 1.4 MGD and a soluble BOD of 100 mg/L?

To determine the organic loading in pounds per 1,000 cubic feet, we need to calculate the total load of BOD entering the treatment system based on the given flow rate and concentration of soluble BOD. The formula for calculating organic loading is as follows:

1. Convert MGD to cubic feet per day (CFD): Since 1 million gallons per day is equal to 7,480 gallons, you can convert MGD to cubic feet using the conversion factor (1 gallon = 0.133681 cubic feet):

[ 1.4 , \text{MGD} = 1.4 \times 7,480 , \text{gallons/day} \times 0.133681 , \text{cu ft/gallon} \approx 14,163.07 , \text{cu ft/day} ]

2. Calculate the BOD load in mg/day: Multiply the flow rate in gallons per day by the concentration of BOD in mg/L. First, convert the flow rate to liters (1 cu ft = 28.3168 liters), then apply the BOD concentration:

[ \text{BOD