TABLE 1.

Reclamation processes of wastewater treatment plants.

Step	Treatment	WWTP 1	WWTP 2	WWTP 3	WWTP 4
	Coarse screening	X	X		X
	Fine screening	X		X
Pretreatment	Sifting	X	X	X	X
	Flow homogenization tank	X			X
	Grit removal	X	X	X	X
	Grease removal	X	X	X	X
Primary	Physicochemical treatment	X			X
treatment	Decantation	X	X		X
	Activated sludge	X			X
	Extended aeration		X	X
Secondary	Nitrogen removal	X	X	X	X
treatment	Phosphorus removal	X		X
	Coagulation—Flocculation	X
	Filtration	X
Tertiary	UV	X		X
treatment	Chlorination		X		X