유기성 폐기물로서 두부비지를 이용한 친환경 목재 방부제 개발 및 평가 (Evaluation and Development of the Environmental-friendly Wood Preservatives Formulated by Okara as Organic Waste)

서지정보

· 발행기관 : 한국폐기물자원순환학회
· 수록지 정보 : 한국폐기물자원순환학회지 / 26권 / 4호 / 319 ~ 328페이지
· 저자명 : 김호용, 최인규, 안세희, 윤영호, 양인, 구본욱

초록

As a substitute for alkaline copper quat- and copper azole-based wood preservatives, new wood preservatives were formulated with okara, which is an organic residue wasted from the production of tofu, copper chloride and/or borax. Prior to formulating the preservatives, okara was hydrolyzed by three enzymes (celluclast, pectinex and savinase) to easily penetrate the effective components of the preservatives into wood blocks. The preservatives were treated into wood blocks with vacuum-pressure method to measure the treatability of the preservatives, and the treated wood blocks were placed in hot water for three days to measure the leachability of the preservatives. The treatability and leachability of the preservatives were affected by the enzyme, but negatively affected by the addition of borax. Based on the results above, the optimal conditions for formulating okara-based wood preservatives cost-effectively and environmentally might be 0.1ml/g celluclast, 0.1 ml/g pectinex and 0.1 ml/g savinase for enzyme hydrolysis of okara. Leached wood blocks, which were treated with okara-based preservatives and then exposed to decay fungi Gloeophyllum trabeum and Postia placenta over 12 weeks, showed good efficacy. Despite hot water leaching, a number of copper-based structures in the cell lumen were still found by SEM-EDS analysis. Therefore, okara might have a potential to be used as a raw material of the environmentally friendly wood preservatives.

영어초록

As a substitute for alkaline copper quat- and copper azole-based wood preservatives, new wood preservatives were formulated with okara, which is an organic residue wasted from the production of tofu, copper chloride and/or borax. Prior to formulating the preservatives, okara was hydrolyzed by three enzymes (celluclast, pectinex and savinase) to easily penetrate the effective components of the preservatives into wood blocks. The preservatives were treated into wood blocks with vacuum-pressure method to measure the treatability of the preservatives, and the treated wood blocks were placed in hot water for three days to measure the leachability of the preservatives. The treatability and leachability of the preservatives were affected by the enzyme, but negatively affected by the addition of borax. Based on the results above, the optimal conditions for formulating okara-based wood preservatives cost-effectively and environmentally might be 0.1ml/g celluclast, 0.1 ml/g pectinex and 0.1 ml/g savinase for enzyme hydrolysis of okara. Leached wood blocks, which were treated with okara-based preservatives and then exposed to decay fungi Gloeophyllum trabeum and Postia placenta over 12 weeks, showed good efficacy. Despite hot water leaching, a number of copper-based structures in the cell lumen were still found by SEM-EDS analysis. Therefore, okara might have a potential to be used as a raw material of the environmentally friendly wood preservatives.

참고자료

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