Abstract: Spray drying technology was found to be widely used in many industries. This paper summarized the developments of spray drying of biomass materails in terms of processing, mechanism, quality of product and economically utilization of energy etc. The review showed that there were some problems which needed to be improved in term of process and equipment. For examples, the product quality was degraded due to high inlet temperature, wall deposits existed in drying chamber or process pipes, energy efficency was low and active contents in the biomass were damaged, etc. Therefore the further investigation in spray drying technology was necessary.

Key words: spray drying, biomass, energy efficency, quality of product