To translate the sugar to the Haworth projection, first number the carbon backbone, then number the ring. Then place the substituents. Knowing the sugar is in the D‑configuration tells us where to place which substituent?

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

since electrons are negative the answer is neagtaive