a b s t r a c t
Spirulina is the most extensively used microalgae for animal and human nutrition mostly because of its
high protein content, 60–65% on a dry weight basis. The drying is the most expensive operation. The aim
of the study was to characterize drying of Spirulina platensis in thin layer. A Statistical model was applied
to analyze the effects of independent variables (air temperature and loads of solids in the tray) on the
response of solubility in acid medium. The analysis of phycocyanin content was determined at the best
drying condition. The Spirulina isotherm data were adjusted through Guggenheim, Anderson and de Boer
(GAB) and Brunauer, Emmett and Teller (BET) correlations. The nonlinear regression analysis of isotherms
data showed that the GAB equation more effective adjusted the experimental data (R2 > 99% and
E% < 10%). Drying curves of Spirulina showed only a decreasing rate-drying period. The material load
and the interaction between the air temperature and material load were significant effects (P 6 0.05),
and the best results of solubility in acid medium (79%) occurred at 60 C and 4 kg/m2. In under these
conditions the phycocyanin content was determined to be 12.6% of dried Spirulina.
برای دانلود به ادامه ی مطلب مراجعه فرمایید
ادامه مطلب
+ نوشته شده توسط نارگل در پنجشنبه بیست و یکم اردیبهشت ۱۳۹۱ و ساعت
|