Designing Water Reuse in a Paper Mill by Means of Computer Modelling

D. Ravnjak, G. Ilić and A. Može

Abstract
With an increasing water loop closure, the papermaking industry must implement different process changes. Computer simulation can be used as a very useful and cost-effective tool for prediction of consequences associated with such changes. In the case study presented, a computer model of papermaking process stock preparation and wet end has been created with help of WinGEMS modelling software. The process equipment change and possibilities for water reuse in terms of water quality, fresh water demand, and wastewater generation were studied by means of a computer model. The results predicted by the computer model were also verified by measurements after the equipment change had actually been made.

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Keywords
papermaking, computer modelling & simulation, waste water, water reuse