Determination of the Optimum Conditions of Enzyme Treatment for Reducing Energy Consumption of Chemical Mechanical Pulp From Hornbeam Wood

In this study, CMP pulp yield and refining energy consumption of treated pulp affected by the fungus Phanerochaete chrysosporium BKM - 1767 were evaluated and compared with control samples. After preparing fungal specimens, hornbeam chips were treated at three levels 1, 2 and 4 weeks under temperature 39oC with relative humidity 65%. For preparing CMP pulp from treated chips, Production conditions were as follows: cooking temperature 165oC, cooking time (80 and 90 minutes), the percentage of sodium sulfite chemicals: 14%, 18%, 22% in comparison to the cooking liquid to chips which was 7 to 1. The results showed that treated wood, rate of output has decreased. In comparison to the control group. The reduction for treatments for the weeks 1, 2 and 4 was about 1.64, 2.84, and 6.20 percent respectively. Furthermore, increasing the consumption of chemicals has increased the yield, which actually increased the severity of reactions compression yield after cooking. The results of refining showed increasing the fungal treatment period caused easier refining and less consumed energy so that the week 4 treatment caused 40% reduction in refining energy.