Calculate the dosage of activated carbon to reduce an influent concentration of 300 g/L of chloroform to 100 g/L (treatment objective) using powdered activated carbon

 Calculate the dosage of activated carbon to reduce an influent concentration of 300 μg/L of chloroform to 100 μg/L (treatment objective) using powdered activated carbon (PAC) and granular activated carbon (GAC).
State which assumptions you made in the above calculations.
Flow rate is 10 mgd. Freundlich adsorption capacity parameter K for both carbons equals to 117 μg/g*(L/μg)0.483. How long will the GAC last if the filter density ρF is 0.37 g/cm3 and EBCT is 15 min?