Development of inclined plate honey moisture reduction system.

Abstract

Honey is delicious, nutritious and has high medicinal value in comparison to other sweeteners. Honey is usually extracted from comb as immature product which results in high moisture which makes it more liable to be fermented by osmophilic yeasts. So, it needs to be processed for moisture reduction, to delay crystallization and to overcome the problem of fermentation. In the present investigation, a honey moisture reduction system was developed and tested to reduce the moisture content of honey to about 17%. The system consisted of a flat plate inclined at an angle. The plate was heated from the underside and honey for moisture reduction was re-circulated over it until desired moisture content was achieved. Experiments were conducted for honey moisture reduction at water temperature of 40-70°C with plate inclinations of 30°-60° according to four level full factorial design of experiment. The results showed that the total reduction time required for reaching moisture content of about 17% varied with water temperature and angle of inclination. The moisture reduction time required for reaching a moisture content of 17 percent at 40°C was about five times the time required at 70°C. The energy cost of honey moisture content reduction from 21.5 to 17% was Rs. 4.7 to Rs. 12.5 per kg.