A red pepper farmer wants to prepare process water from a brackish water source with a single

stage RO$-$unit. The source contains $3000ppm$ of salt $(NaCl)$ and the required water quality must

be below $200ppm$ salt. The required capacity is a permeate production of $10\frac{m^3}{h}.$ Four different

modules are available.

Develop a single$-$pass installation with a minimum membrane area and with a recovery of $75\%.$

Hint. Choose first the module which meets the criteria.