Studies on the Hydrolysis of the Waste wood of Cortinellus edodes with Trichoderma viride Cellulase

표고재배폐재(栽培廢材)의 당화(糖化)에 관(關)한 연구(硏究)

In this study, enzymatic hydrolysis of the substrate of the waste wood of Cortinellus edodes was investigated using crude cellulase preparation of Trichoderma viride Pers. ex. Fr. SANK 16374. The crude cellulase was produced by the submerged culture process and produced in the culture fluid was salted out quantitatively by the use of ammonium sulfate. Reducing sugar was determined by the dinitrosalisylic acid (DNS) method. 1. The chemical composition of the waste wood was crude protein 2.26%, c. fat 2.57%, c. fibre 44.60%, c. ash 5.58% and lignin 13.62%. In amino acid composition, no cystine and methionine was showed, but trace amount of Vitamin A, $B_1$, and $B_2$, niacine and chloride were detected. (Table 1) 2. As heat treatment of the substrate was found to produce the highest reducing sugar yield being reacted for 48hr. with T.v cellulase, the substrate was heated to $190{\pm}5^{\circ}C$. for 45 min. either before or immediately after milling. 3. The substrate heated and ball milled at $190{\pm}5^{\circ}C$. for 45 min. the reducing sugar yield reached to 11.5%. 4. The substrate without any treatment was found to produce the highest reducing sugar yield being reacted 72hr. with T. v cellulase, the reducing sugar yield reached to 10.1%. 5. The rate of reducing sugar per each treated substrate was decreased by the order of the substrated, heated and then ball milled at $190{\pm}5^{\circ}C$. for 45 min. (11.5%)> without any treatment (10.1)> ball milled and heated at $190{\pm}5^{\circ}C$. for 45 min. (6.9%). 6. Saccharification of waste wood has been shown to be possible by heat treated and milling the substrate in contact with cellulase. And it is likely to be recommended that the waste wood may be valuable for raw materials of saccharification.

Trichoderma viride SANK 16374호(號) Cellulase에 의(依)한 표고재배폐재(栽培廢材)의 당화(糖化)에 관(關)한 연구(硏究)로서 효소생산(酵素生產)은 액체진탕(液體振盪) 배양법(培養法)에 의(依)하였다. 이와같이 하여 생산(生產)된 조효소액(粗酵素液)을 취(取)하여 유안포화도(硫安飽和度)에 의(依)한 염석효소액(鹽析酵素液)을 공시용(供試用) 효소액(酵素液)으로 사용(使用)하였다. 그리고 환원당(還元糖) 정량(定量)은 DNS법(法)에 의(依)하였다. 1. 표고재배폐재(栽培廢材)의 일반적(一般的) 조성(組成)은 조단백질(粗蛋白質)이 2.26%, 조지방(粗脂肪)이 2.57%, 조섬유(粗纖維)가 44.6%, 회분(灰分)이 5.58%, 리그닌이 13.62%, 가용무질소물(可溶無窒素物)이 23.21%였다. 그리고 아미노산(酸)의 조성분(組成分)과 비타민의 성분(成分)은 (Table 1)과 같다. 2. 표고재배폐재(栽培廢材)를 $190{\pm}5^{\circ}C$에서 45분간(分間) 열처리(熱處理)한 기질(基質)은 Cellulase에 의(依)한 반응(反應)이 48시간(時間)이면 환원당(還元糖) 생성량(生成量)이 최대치(最大値)에 달(達)하였다. 3. 표고재배폐재(栽培廢材)를 $190{\pm}5^{\circ}C$에서 45분간(分間) 열처리(熱處理)한 후(後) 분쇄(粉碎)하여 사용(使用)한 기질(基質)은 환원당(還元糖) 생성량(生成量)이 11.5%이었다. 4. 열처리(熱處理)하지 않은 표고재배폐재(栽培廢材)의 기질(基質)은 cellulase 반응시간(反應時間)이 72시간(時間)에 환원당(還元糖) 생성물(生成物)이 최대치(最大値)에 달(達)하였으며 그 양(量)은 10.1%였다. 5. 각처리별(各處理別) 환원당(還元糖) 생성량(生成量)은 폐재(廢材)를 열처리후(熱處理後) 분쇄(粉碎)한 기질(基質)(11.5%)> 열처리(熱處理)하지 않은 기질(基質)(10.1%)> 분쇄후(粉碎後) 열처리(熱處理)한 기질(基質)(6.9%) 순(順)으로 나타났다. 6. 표고재배폐재(栽培廢材)의 당화(糖化)는 기질(基質)을 열처리후(熱處理後) 분쇄(粉碎)함으로서 더욱 가능(可能)하였다. 그리고 당생성량(糖生成量)이 증대(增大)될 수 있어 당질원료(糖質原料)로 가능(可能)할 것으로 본다.