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바이오에탄올 생산을 위한 폐MDF의 전처리 및 효소 당화
강양래(Yang-Rae Kang),황진식(Jin-Sik Hwang),배기한(Ki-Han Bae),조훈호(Hoon-Ho Cho),이은정(Eun-Jeong Lee),조영손(Young-Son Cho),남기두(Ki-Du Nam) 한국생물공학회 2015 KSBB Journal Vol.30 No.6
The objective of this study was designed to determine the possibility of bioethanol production from wasted medium density fiberboard (wMDF). We were investigated the enzymatic saccharification characteristics using the enzyme (Cellic CTec3) after pretreatment with sodium chlorite. According to the component analysis results, the lignin contents before and after the pretreatment of wMDF (milling using sieve size of 1,000 μm) was significantly reduced from 31.13% to 4.11%. Therefore, delignification ratio of pretreated wMDF was found to be up to about 87-89% depending on the sieve size. And we were tested to compare the saccharification ratio according to the sieve size of wMDF (1,000 μm, 200 μm), but it was no significance depending on the sieve size. When enzyme dosage was 5% based on the substrate concentration, enzymatic saccharification ratio was obtained up to 70% by maintaining at 50℃ for 72 hours. We could made the substrate concentration of pretreated wMDF (1,000 μm) up to 12% and then enzymatic saccharification ratio was 76.8%, also contents of glucose and xylose were analyzed to 77,750 and 14,637 mg/L, respectively.
강양래(Yang-Rae Kang),황진식(Jin-Sik Hwang),배기한(Ki-Han Bae),조훈호(Hoon-Ho Cho),이은정(Eun-Jeong Lee),조영손(Young-Son Cho),남기두(Ki-Du Nam) 한국생물공학회 2016 KSBB Journal Vol.31 No.1
The aim of this study attempted to verify the possibility of bioethanol production using wasted medium density fiberboard (wMDF). In order to produce bioethanol from wood cellulosic materials must be carried out the process of pretreatment, saccharification, fermentation and distillation. First, the wMDF was pretreated using sodium chlorite and pretreated wMDF was prepared to 8% slurry and then slurry was saccharified with the commercial enzyme (Cellic CTec3). The fermentable sugar and pH of saccharified substrate were about 5.5% glucose and 4.4, respectively. Herein we compared the results of ethanol yield according to the nutrients added or without addition to increase ethanol yield. Ethanol fermentation was finished in about 24 hours, but it was delayed in experimental group without nutrients. Ethanol content and fermentation ratio of the final fermented mash prepared by utilizing jar fermenter was 25.40 g/L and 86.64%, respectively. At this time, the maximum ethanol productivity was confirmed as 1.78 g/Lh (ethanol content 21.38 g/L, 12 h), and the overall ethanol productivity was 1.05 g/Lh (ethanol content 25.27 g/L, 24 h). Using fermented liquid we could produced bioethanol 95.37% by continuous distillator packed with copper element in laboratory scale. These results show that wMDF has a potential valuable for bioethanol production.