MAXIMUM WATER RECOVERY FOR A SERIES OF WATER TREATMENT UNITS IN A SEMICONDUCTOR PLANT

Abstract

Nowadays, water demands are growing every year because most process industries and buildings
use water for a wide range of applications. In order to reduce water demand, industries have come
out with a better water management and water minimisation technique. Water pinch analysis
(WPA) is a systematic technique for the design of water recovery network to minimize the water
demands and maximize water reuse and recycling through integration of water using activities and
process. This paper considers maximizing water recovery considering injecting reused wastewater
to different location of a series water treatment units using water pinch analysis. The method was
employed to a semiconductor plant case study. The result shows that consideration of bypassing
some water treatment system unit increases further freshwater savings. It also decreases operating
cost of the treatment units.