Symbols
$A_m$	Effective membrane area	m2
$C_1$	Salt concentration of the city network water	mg L−1
$C_2$	Desired salt concentration	mg L−1
$D$	Solute diffusivity	m2 s−1
$d_h$	Hydraulic diameter	m
$EC$	Electrical conductivity	mS cm−1
$J_p$	Volumetric permeate flux	m s−1
$k_{mt}$	Mass transfer coefficient	m s−1
$OP$	Operating pressure	kPa
$Q$	Volumetric flow rate	L min−1
$Re$	Reynolds number	-
$Sh$	Sherwood number	-
$Sc$	Schmidt number	-
$SEC$	Specific energy consumption	kWh m−3
$T$	Temperature	°C
$TDS$	Total dissolved solids	mg L−1
$v$	Water velocity in membrane module	m s−1
$V_1$	Volume of the feed tank	L
$\beta$	Polarization factor	-
$\mu$	Fluid viscosity	Pa s
$\rho$	Density of water	kg m−3
Subscripts and abbreviations
$ED$	Electrodialysis
$RO$	Reverse osmosis
$p$	permeate
$f$	feed
$R$	rejection
$m$	membrane