In the paper industry limy deposits out of the circulation water in pipes, cooling systems, heat exchangers etc. are being eliminated by the utilization of lime traps. This considerably reduces the fresh water consumption and secures a sustainable improvement of the process reliability. Also the cost for maintenance and service of the systems are reduced significantly. By means of Micro Bubble Generator it has been managed to reduce the energy costs of traditional systems by more than 65%. Moreover cost- and maintenance intensive components like pressure reactors do not occur.