Development and Use of a Low-Cost Extruder for the Rice-Oil Stabilization

미강안정화(米糠安定化)를 위한 저렴 Extruder의 개발 및 이용

  • Cheigh, Hong-Sik (Division of Bio-engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Chul-Jin (Division of Bio-engineering, Korea Advanced Institute of Science and Technology)
  • 최홍식 (한국과학기술원 생물공학부) ;
  • 김철진 (한국과학기술원 생물공학부)
  • Published : 1984.03.30

Abstract

A simple and low cost autogenous-type extruder with a capacity of about 400kg/hr for rice bran-oil stabilization was developed. Specific energy consumption of the extruder was 0.060-0.070 KWH/kg of rice bran during extrusion. Rice bran was easily extruded to form flakes or pellets with an increase of bulk density. And also the desired extrusion temperature of $95^{\circ}C{\;}to{\;}150^{\circ}C$ could be easily obtained without any water addition when the rice bran was properly parametered with feed rate. The moisture content of bran was reduced and peroxidase was significantly inactivated after extrusion. The rice bran stabilized by the extrusion process was excellent in storage stability without considerable increase in free fatty acids.

국내도정공장에 간단히 부착운용할 수있는 미강안정화 처리용 저렴 Extruder (K-E3030 - 100. 처리능력 시간당 400kg)를 개발하였다. 부산된 미강을 그대로 안정화기로 처리하면 pellet형으로 성형된 안정화 미강을 얻을 수 있다. 안정화 처리온도는 원료투입속도를 조절함으로서 $95-150^{\circ}C$ 범위에서 조절이 가능하며, 이때 전력 소모량은 원료미강kg 당 0.060-0.070KWH이었다. 안정화 처리미강은 처리온도에 따라 용적밀도가 원료미강의 0.313g/cc에서 0.526-0.601g/cc로 증가하였고, 수분함량은 13.08%에서 10.41-6.03%로 감소하였다. 그리고, 처리온도가 $120^{\circ}C$이상인 경우에는 학절기의 기후 조건하에서 9 주간 저장하여도 유리 지방산의 함량이 15%를 넘지 못하였다.

Keywords