API	American petroleum institute	OMS	oily model solution
Al2O3	aluminum oxide	Ppm	parts per million
$C_f$	initial oil concentration in feed	PW	produced water
$C_{t0}$	initial oil concentration in feed tank	$P_{feed}$	pressure on the feed side
$C_{tn}$	oil concentration in feed at the time ${\mathrm{t}}_{\mathrm{n}}$	$P_{retentate}$	pressure on the retentate side
Coil	oil concentration	$P_{filtrate}$	pressure on the filtrate side
$C_p$	oil concentration in permeate	$R_t$	total membrane resistance
CFV	cross flow velocity	$R_f$	membrane fouling resistance
CMOS	complementary metal oxide semiconductor	$R_m$	membrane resistance
COD	chemical oxygen demand	$R_{oil}$	oil rejection efficiency
FRE	flux recovery efficiency	SiC	silicon carbide
$J_f$	water flux of fouled membrane	SiO2	silicon oxide
$J_{W0}$	pure water flux of fresh membrane	TDS	total dissolved solids
$J_{W\mathrm{c}}$	pure water flux after cleaning	TDPW	tank dewatering produced water
kDa	Kilodalton	TiO2	titanium oxide
${\mathrm{L}}_{\mathrm{w}}$	membrane permeability	TOC	total organic carbon
MF	Microfiltration	TMP	transmembrane pressure
MWCO	molecular weight cut-off	TSS	total suspended solids
µ	dynamic viscosity	UF	ultrafiltration
NF	Nanofiltraion	$V_{ft0}$	initial volume of feed at the time ${\mathrm{t}}_0$
		$V_{ftn}$	initial volume of feed at the time ${\mathrm{t}}_{\mathrm{n}}$