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Pitch Control of Masson Pine Groundwood Puop with Lipase

Qin Menghua; Chen Jiaxiang;Yu Jialuan(South China University of Technology, Guangzhou, 5lO641)  
The biological pitch control of Pinus Masson Lamb groundwood pulp was studied. Three different lipase isolated from Candida lipolytica, Candida cylindracea and Pancreas respectively were beingused. Vibromixer deposition tests revealed that with Candida lipolytica, favorable conditions were as follows:lipase charge 5 u/g pulp, temperature 40℃,time 2h, pH7. 0. Under such conditions, the RN value (i. e. theratio of neutrals to the sum of neutrals plus weak acids)dropped from 23. 8% to 17. 8%, while 83% of theglycerides were being hydrolyzed. It has been found that the RN value was an effective measurement for the e-valuation of lipase pitch control.
【CateGory Index】: TS7
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