Studies ar e conducted to upgrade the wastewater reclamatıon and reuse system of a waste paper process industry (Onduline Avrasya Company) located in Sakarya. No operaıional problem was observed due to reuse of the reclaimed vvastevvater. Quality of the products were as good as those manufactured by use offresh water. In-plant control, reclamation and reuse ofwastewater, proposed treaıment plaııt dimensions mil be reduced and economy wıll be provided in the investment, managemem and water supply. As a result, some changes in the units and ın-plant control due to reuse ofwastewater show that wastewaıer and pollıttion loads will be reduced signifıcantly. in addition, reclamation and reuse of wastewater from Industries play the most important role to prevent environment and water resources.