A membrane filtration unit is operating with 61.0 m2 of membrane and processes 142 L/min feed of wastewater. The permeate flow is 86.3 L/min. The filter removes suspended solids from a waste stream such that the concentration in the permeate is 23.1 mg/L compared to 3,142 mg/L in the retentate. Determine the flux of permeate (in L/m2/d). Report answer as a whole number (no decimal).