Final answer:
To calculate the kilograms of suspended solids (represented as BODs) removed in the primary settling tank in a week, we first convert the flow rate to liters per day.
Step-by-step explanation:
Then, we calculate the mass of suspended solids removed using the suspended solids removal efficiency and the concentration. Finally, we convert the mass from milligrams to kilograms.
In order to calculate the kilograms of suspended solids (represented as BODs) removed in the primary settling tank in a week, we need to first calculate the flow rate in liters per day. Since the average flow rate is given in m/s, we need to convert it to liters per day. There are 86400 seconds in a day, so the flow rate is 0.050 m/s * 1000 L/m³ * 86400 s/day = 4320 L/day.
Next, we need to calculate the mass of suspended solids (represented as BODs) removed. Since the suspended solids removal efficiency is given as 70%, the mass of suspended solids removed is 0.70 * 570 mg/L * 4320 L/day = 1322640 mg/day.
Finally, we need to convert the mass of suspended solids from milligrams to kilograms. Since there are 1000 milligrams in a gram and 1000 grams in a kilogram, the mass of suspended solids removed is 1322640 mg/day / 1000 mg/g / 1000 g/kg = 1.32264 kg/day.