A membrane filtration unit is operating with 75.5 m2 of membrane and processes 111 L/min feed of wastewater. The permeate flow is 84.2 L/min. The filter removes suspended solids from a waste stream such that the concentration in the permeate is 17.5 mg/L compared to 3,210 mg/L in the retentate. Determine the flux of permeate (in L/m2/d). Report answer as a whole number (no decimal).