Pectinase reduces the cationic demand of peroxide-bleached TMP: A paper machine trial

In two pilot paper machine trials, pectinase reduced the cationic demand of white-water filtrate by 49% and that of the total white-water by 35%. The enzyme was more effective at decreasing the cationic demand than the two commercial coagulants tested. And, at the dosages used cellulase and hemicellulase present in the commercial pectinase preparation did not significantly affect freeness or paper properties. While pectinase may allow savings in cationic chemicals, even greater savings might come from white-water conservation opportunities.