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RECYClED linERBoARD CHEMisTRY world pulppaper48 PRoGRAMME DEsiGn As a first step a high molecular weight cationic flocculant along with colloidal silica and a balance of thin versus thick stock starch provided necessary drainage on the fourdrinier. The ability to move the dry line on the fourdrinier was evident. However this particular chemistry did not result in increased machine speed or strength. Several parameters were adjusted on the fourdrinier and press section but no change provided sustained results. This was not a major setback as pre- trial audit findings suggested this was possibly due to limitations in the press section. The initial chemistry selection provided important technical information and demonstrated the Nalco teams ability to understand the papermaking process dynamics and provide a technical reason for the paper machine response observed. Nalcos next step focused on a two- component polymer approach using high molecular cationic flocculant in combination with one of Nalcos METRIX technology products. METRIX technology was selected for this customer due to proven effectiveness with similar furnishes and also due to the inability of a traditional retention and drainage programme to meet the mills key business drivers. METRIX also provides additional strength to allow for reduction in basis weight and refining. Vast experience with this technology along with a thorough understanding of the papermaking process at this manufacturers facility allowed Nalco to design a programme that would provide maximum results at the lowest sustainable cost. In designing the feed strategy of step two existing wet-end additives were considered as well as their respective location to each unit operation. A feed location was selected that provided maximum METRIX technology retention with minimal interference from disruptive fines and colloidal material. The strategy incorporated a co-mix strategy of high molecular weight cationic flocculant and METRIX. At this facility overfeeding occurs at 3.0 lbton 1.36 kgton of METRIX therefore the team selected 2.0 lbton 0.91 kgton as the final dosage. PRoGRAMME REsulTs After completing several trials with the METRIX technology programme this customer incorporated the programme on a full time basis. They realised the following economic and environmental benefits to their operation After completing several trials with the METRiX technology programme this customer incorporated the programme on a full time basis eROI is Nalcos exponential value the combined outcomes of improved performance operational efficiency and sustainable impact delivered through their services and programmes. Customer impact eROI Economic Results Increased production rate an average of 1.5-2.0 while realising a 7-10 increase in manufactured square footage Operational return on investment 750hour of production or 2900000year Savings of more than 29.4 billion BTUyear More than 135000year savings Lower basis weight resulted in bre reduction of 4847 tons year. All wet-end chemical fed on a ton basis realised an annualised reduction equivalent to dosage rate multiplied by bre savings of 4847 tons More than 1100000year savings Reduced more than 1074 lbyear of VOCs volatile organic compounds Mill is operating within VOC regulatory limits Saved 90000 gallonsyear in polymer make-down water Reduced water use footprint