A tubular MF system treating an industrial wastewater is operated with an influent flow rate of 120 L/min, a flux of 45L/m2 h, and a recovery of 95%. Each membrane module contains 3.0m2 of membrane. The feed contains 6.2mg/L of suspended solids, and the overall solid rejection efficiency is 99.5%.
(a) How many modules are required?
(b) What are the concentrations of suspended solids in the permeate and concentrate?
(c) What mass of solids is sent to the solid settling pond daily?