COMBINED ENZYMATIC AND CHEMICAL CONTROL AGENT METHODS TO CONTROL DCS IN APMP
Polygalacturonic acids, the main contributor of anionic trash, could be degraded by pectinase into monomeric galacturonic acid, resulting in the elimination of the cationic demand (CD) of white water. The addition of chemical control agent could destabilize the Dissolved and Colloidal Substances (DCS), and decrease the CD of white water. In this paper, APMP slurry was treated by the pectinase, chemical control agents and the combined method respectively. Results show that the CD can be decreased by 51.86％ when the white water from APMP slurry was treated by alkaline pectinase 1.5U/g (50℃, 30min, pH 8.0), and PA of 0.16％, HCS of 0.33％ and CPAM of 0.06％, respectively. The DCS was analyzed by GC-MS and the results indicated that the chemical control agent could fix the fatty acid on the fibers and remove them effectively. The GC-MS analysis also proved that pectinase degraded the polygalacturonic acids into monomeric galacturonic acid effectively. The drainage and retention properties of pulp slurry were improved efficiently by the combined method treatment, and also the strength properties of hand-sheets increased obviously.
DCS pectinase chemical control agent
Liu Jun Hu Huiren Yang Sha
Tianjin Key Lab of Pulp & Paper, Tianjin University of Science & Technology, Tianjin, 300457, China
国际会议
广州
英文
941-944
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）