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WORLD PULPPAPER 55 The implementation of the PerForm PC303LM program has resulted in more stable running conditions on the paper machine efficiency. Benefits of Improved Dewatering Improved paper machine runnability Improved ply bond results on specific grades Lower total operating costs Reduced retention treatment costs by up to 75 The authors wish to extend a special thanks to the Mayr Melnhof Neuss mill which collaborated extensively with Solenis to demonstrate the success of this new methodology and polymer- based program. REFERENCES 1 Risnen K. O. Paulapuro H. and Karrila S. J. The Effects of Retention Aids Drainage Conditions and Pretreatment of Slurry on High- Vacuum Dewatering A Laboratory Study Tappi J. 78 4 140 1995. 2 Maunier C. O. and Ramarao B. V. Effect of Flocculation on Pulp Drainage Characteristics Proc. TAPPI 1996 Engineering Conf. 221. 3 Kufferath W. Dewatering Process on the Paper Machine Deut. Papierwirt. 1983 163 1983. 4 Risnen K. Karrila S. and Maijala A. Vacuum Dewatering Optimisation with Different Furnishes Paperi Puu 78 8 461-467 1996 5 Britt K. W. Unbehend J. E. and Shidharan R. Observations on Water Removal in PapermakingTappi J. 69 7 76-79 1986 6 Lindberg L. Pulsed Drainage of Paper Stock Svensk Papperstidn. 73 15 451-454 1970 7Baldwin. L. High Vacuum Dewatering Paper Technol. 38 4 23-28 1997 8 Retulainen E.Condebelt Press Drying and Sustainable Paper CyclePaperi Puu 85 6329-333 2003 9 Wahlstrm B. Wet Pressing in the 20th Century Evolution Understanding and Future Pulp Paper Can. 102 12 81-88 2001 10 Hubbe M.A. Tripattharanan T. Heitmann J.A. and Venditti R.A. The Positive Pulse Jar PPJ Aflexible Device for Retention Studies Paperi Puu 86 2004 accepted 11 Ahrens F. Alaimo N. Nanko H. and Patterson T. Initial Development of an Improved Water Retention Value Test and its Application to the Investigation of Water Removal Potential TAPPI 99 Proc.37-47 TAPPI Press Atlanta 1999 It is anticipated that the Total Dewatering Concept will support the development of novel polymers to improve dewatering at each stage of the papermaking process. 5. Conclusion The development of the Total Dewatering Concept and subsequent application to real papermaking processes has yielded significant benefits for the Mayr Melnhof mill in Neuss. The implementation of the PerForm PC303LM program has resulted in more stable running conditions on the paper machine and total operating costs have been greatly reduced through the reduction in polymer consumption. The Total Dewatering Concept can be applied in all cases where paper producers are seeking to optimise water removal in their processes whilst maintaining or improving the paper properties quality and overall machine Figure 3. Total Dewatering Concept Results