초록

1. 태국의 미강생산현황조사 TISTR 및 태국 산업계와 정보교환 및 현지출장을 통하여 도정공장의 현황 및 미강의 이화학적 성질을 분석하여 태국형 미강안정화처리기의 개발의 기초자료로 한다.2. 태국형 미강안정화처리기의 개발 및 최적운전조건 확립 획득한 기초자료를 바탕으로 안정화처리기의 일반사양을 결정하고 이에 바탕을 둔 각 부품의 보완 설계를 완료하고 시험제작하고, 시험운용을 통하여 최적운전조건을 확립한다.3. 안정화처리미강의 저장성 검토 시험생산된 안정화처리미강의 태국현지에서의 저장성 실험을 통하여 최적 열처리 정도를 결정한다.

Abstract ▼

Due to the presence of lipolytic enzymes in rice bran, the free fatty acid of the rice bran oil increased if the bran oil is not extracted immediatily after milling. With the increase of free fatty acid in the rice bran oil, the oil becomes inedible and the refining cost prohibites the use of high f

Due to the presence of lipolytic enzymes in rice bran, the free fatty acid of the rice bran oil increased if the bran oil is not extracted immediatily after milling. With the increase of free fatty acid in the rice bran oil, the oil becomes inedible and the refining cost prohibites the use of high free fatty acid oil for edible purpose. Stabilization of rice bran is the procedure of inactivating the lipolytic enzyme in rice bran so that the increase of FFA in rice bran oil is checked and the oil can be used for edible purpose by the solvent extractors at their convenience.Thailand is one of the leading rice producer. The main by-product of rice, rice bran have the posiblity of the largest edible oil resources but now this is about 10% used for production of rice bran oil. It shall be possible to substitute the 50% import vegetable oil by increasing the productivity of rice bran oil if the proper stabilization process of rice bran are adapted and distributed at local mill in Thailand. There are many processed to stabilize the rice bran done by and in many countries. Among them, a extrusion-cooking process is the newest and best approach to the processing of rice bran, accomplishing both inactivation of the enzyme in the bran and agglomeration of fines. In 1981, KAIST invented Rice Bran Extrusion stabilizer with Low-Cost Cooking System (LEC). The machine and its process is very proper to be introduced into Thailand to improve utilization of rice bran oil and solve the problem of insufficient supply of vegetable oil in Thailand. This research project was carried out for technology transfeo of rice bran extrusion technology from KAIST to TISTR. The results from the first year execution of the project are the followings. 1) The stabilizing unit must be located at the rice mill having the capacity of above 20 M/T/day and multi-step milling process. And its production capacity has to classify into two scales ie., one has a capacity range 150-250kg/hr and the other has 300-400 kg/hr. 2) Stabilized bran should have less than 9% moisture and 13% FFA for five week storage and transportation periods. And it is disirable the stabilized bran will be formed into pellet form. 3) The attachment of break bars in the metering section of main screw was required to easily control the intensity of heat treatment. During extrusion of rice bran at the production rate of lower than 200kg/hr, the extrusion temperature can be ajusted with the modified main screw by simply changing the number of die hole opening. 4) The optimum number of die hole opening at the two production rate of 200kg/hr and 400kg/hr was 12 and 6 hole, respectively. 5) The specific power consumpution at the optimum condition was 57.5 KWH/M/T and about 87% of the consumed power was dissipated as viscose heat generation.The above results were obtained from the study in which a target mill have a capacity of above 20M/T/day and located in the area could be supplied the electricity. And those mills are only 5% of the total mills in Thailand. The further researches concerned on the improvement of power drive system and on the demonstration of the extraction and refining process with the stabilized rice bran are indispensable to promote the dissemination of the technology to the whole country of Thailand.The research work conserned on the solution of the problems be drived from the test operation at TISTR have to be continued to establish a bridgehead of commercialization of the stabilization technoloey.

목차 Contents

• 표지...1
• 제출문...5
• 요약문...7
• 목차...19
• 제1장 서 론...21
• 제2장 태국의 미강생산현황...26
• 제1절 태국의 도정공장...26
• 제2절 태국산 미강의 이화학적 특성...29
• 제3장 태국의 도정공장에 적합한 형태의 미강 안정화 처리기의 개발...32
• 제1절 미강안정화 처리기의 사양 결정...32
• 제2절 주요부품의 규격변경 및 시험제작...33
• 제3절 미강안정화처리기의 최적운전조건...37
• 1. 시험운전...37
• 가. 재 료...37
• 나. 운전방법...37
• 다. 결과 및 고찰...38
• 1) 역학적 검토...38
• 가) 미강투입속도...38
• 나) 운전조건에 따른 소요동력 및 전력소모율...40
• 2) 운전조건에 따른 처리온도 및 lipase 잔존활성...44
• 2. 안정화처리 미강의 저장시험...47
• 제4장 결론 및 건의사항...49
• 제1절 결 론...49
• 제2절 건의사항...50
• 참고문헌...52