Quality of the cocoa beans depends on many factors and stages. One of these is the fermentation stage. Using conventional instruments (wooden boxes, barrels, baskets, bamboo basket ...) for fermentation is often make the unstable and uneven product quality because of climate depending. So, design, manufacture cocoa fermenting for improving cocoa bean quality is the target of this study. WASI, Vinanhatrang and Thienphat Company have designed, manufactured and evaluted the machine in 2010.One machine has been designed and manufactured with 200 kg fresh cocoa beans/batch. It was evaluated in 2011 season with: volume of batch, the time of fermentation, the temperature during fermentation, water, quality bean and the results show that:-Volume of each batch is of 200 kg, the best time of fermentation is 5 days to 6 days, temperture is from 400 to 500C that is very profit of cocoa fermentation, it is spent 168lit waters/batch.-The bean quality is 60-80% full fermented beans, 20-40% part purlp beans, the 0% 0.2% bean, brocken slaty beans. That is very quality cocoa beans.As the result, cocoa fermentation by fermented cocoa machine (yield of 200 kg fresh beans/batch) with hot water is quite good, easy operation, revenues and expenditures.
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