Abstract:
Nowadays, Enzymes are more active in various industries especially detergent industry. Nevertheless, enzymes are fragile and sensitive to environmental factors that can affect enzyme activity. Encapsulation technology can improve enzymes for an excellent stability and compatibility with a wide range of commercial solid detergent. In this study, two types of encapsulated protease, matrix and multiple emulsions (W/O/W), were prepared by spray drying. The HI-CAP100 was used as wall material of both types. MCT oil and Pluronic L-31 were used in the preparation of multiple emulsions. Effect of inlet air temperature of spray drying and initial enzyme content in feed solution on enzyme powder activity was studied. Then, solid content of feed stream also experimentally be examined. Weight ratio between oil : enzyme, oil droplet size were applied on the studying of the controlling release of multiple emulsion powder. Moreover, the storage stability test which studied at 4, 25 and 45oC was applied on both powder types. The results showed that high inlet air temperature affects protease activity degradation during spray drying. The use of high concentration of protease in feed result the final enzyme activity maximum but it affected the increasing of moisture content in the powder. Enzyme powder from multiple emulsion preparation can be used for controlling release. The highest weight ratio of oil : enzyme provide the best controlling release. The encapsulation of enzyme can protect the loss of enzyme activity in storage stability test.