Hermetic Storage of High Moisture Corn under Tropical Conditions
Shelled corn of 26% moisture content (m. c.) was stored in a CocoonTM under hermetic conditions for 96 days to demonstrate the effectiveness of maintaining its quality prior to subsequent drying or processing into feeds or ethanol. The CocoonTM was made of a plastic liner and capable of holding 11 tonnes of corn stored in standard bags. Both the CocoonTM and the control consisting of 3 bags were stored outdoors at the University of the Philippines Los Ba os, Philippines. Corn was sampled before and after storage for determination of m. c., starch, ethanol, aflatoxin, and germination rate. Temperature, oxygen and carbon dioxide concentrations were monitored throughout the storage period. The initial corn temperature in the CocoonTM reached 45℃ and then equilibrated with that of the ambient at 30℃ after the first week of hermetic storage. The initial oxygen concentration dropped within one day and remained at an average of 0.54% throughout the storage period. Average m. c. at the end of storage increased to 29%. No significant change in starch content was observed throughout the storage period. Corn in the control bags deteriorated after three days and temperature increased to 55℃. The high moisture corn in the CocoonTM initially had 59 ppb of aflatoxin due to a logistical delay of about 3 days for acquiring the corn from several farmers. Aflatoxin level increased to 90 ppb after one week of storage and remained at that level for 96 days. No presence of insects was observed in the corn samples stored in the CocoonTM. Feeding trials indicated that the corn from hermetic storage was palatable to cows and swine. Results of the study indicate that wet corn can be safely stored for extended periods of time without significant increase in aflatoxin, and without significant changes in starch and ethanol content.
hermetic storage high moisture content corn storage aflatozin ozygen carbon diozide starch ethanol
Arnold R.Elepano S.Navarro
Agricultural and Bio-Process Division, Institute of Agricultural Engineering, College of Engineering Senior Consultant, Food Technology International Consultancy Ltd., Israel
国际会议
成都
英文
259-263
2008-09-21（万方平台首次上网日期，不代表论文的发表时间）