Abstract
In this study, an amylase-producing fungus, strain 15 was isolated from soil in order to saccharify food wastes with cellulolytic and amylolytic enzymes. The amylase production cultures were performed in Mandel's medium with 1% rice straw and 1% paper wastes as carbon sources. The strain produced various cellulolytic (FPase 0.25, xylanase 20.09, CMCase 3.15 U/mL-supernatant) and amylolytic ($\alpha$-amylase 1.20, gluco-amylase 0.70, $\beta$-amylase 2.40 U/mL-supernatant) enzymes in Mandel's medium. In 10 L jar fermenter, maximum amylase and FPase activities, 3.25 and 0.23 U/mL, were obtained when the culture was grown at 30$^{\circ}C$, 200 rpm and 0.6 vvm for 3 days. In 100 mL flask level and 10 L jar fermenter, amylase produced by the strain 15 showed similar cellulolytic and amylolytic enzyme activities with Trichoderma inhamatum KSJ1 isolated from rotten woods by previous researcher. The ability of saccharification to food wastes also showed similar degree. However, the isolate 15 appeared to be yellowish in YMEA plate comparing to Trichoderma inhamatum KSJ1 in greenish.
제주도 토양 샘플에서 분리한 amylase 생산균 15번 균주는 100 mL flask level와 10 L 생물반응기에서 T. inhamatum KSJ1의 FPpase, amylase 효소활성과 거의 비슷하였으며, flask level에서 두 균주의 xylanase, avicelase, CMCase, Gluco-amylase, $\beta$-amylase의 효소활성 및 음식물쓰레기의 당화능력도 모두 거의 비슷하였다. 두 균주를 YMEA 고체배지와 광학현미경으로 그 형태학적 특징을 관찰한 결과 T. inhamatum KSJ1이 녹색빛을 띠는 것과는 달리 amylase 생산균 15번 균주는 황색빛을 띠는 사상균으로 확인되었으며, 두 균주는 동일한 균은 아니지만 동일한 속으로 사료된다.
