Evaluation of drying methods on nutritional constituents and antioxidant activities of Chlorella vulgaris cultivated in an outdoor open raceway pond.
IR@CFTRI: CSIR-Central Food Technological Research Institute, Mysore
View Archive Info| Field | Value | |
| Relation |
http://ir.cftri.com/14807/
https://doi.org/10.1007/s10811-020-02355-2 |
|
| Title |
Evaluation of drying methods on nutritional constituents
and antioxidant activities of Chlorella vulgaris cultivated in an
outdoor open raceway pond.
|
|
| Creator |
Madhubalaji, C. K.
Sandeep, N. Mudliar Chauhan, V. S. Sarada, R. |
|
| Subject |
01 Algae
02 Drying and Dehydration |
|
| Description |
Chlorella vulgaris is known for its protein, growth factor, and nutritional constituents. Chlorella vulgaris was cultivated in a
1000-L outdoor open raceway pond with a maximum volumetric productivity of 130 mg L-1 day-1. The harvested biomass was
dried through different methods, viz., sun drying (30 °C), oven drying (60 °C), lyophilization (−110 °C), drum drying (120 °C),
and spray drying (100–150 °C). The effect of the drying method on proximate composition, pigments (chlorophyll, carotenoids),
bioactive compounds (total phenolic content, flavonoid content), vitamin B12, antioxidant properties (ferric reducing antioxidant
power, DPPH, and total antioxidant activity), and the color quality of C. vulgaris biomass was evaluated. Surface characterization
by scanning electron microscopy (SEM) and functional group characterization through Fourier transform infrared spectroscopy
were also performed. The biomass dried through lyophilization and sun drying retained maximum bioactive compounds and
antioxidant activities. In contrast, drum drying resulted in a loss of nutrients, viz., protein (up to 44%), lipid (up to 41%), vitamin
B12 (up to 40%), total phenolic content (> 50%), total flavonoid content (> 50%), and antioxidant activity (> 50%). Oven drying
led to a loss of 30% in total flavonoid content and 17% in ferric reducing antioxidant power. SEM showed the destruction of cell
wall integrity in the drum-dried sample and porous structure in the spray-dried sample. This study suggests that drying methods
affect the nutrients and bioactive compounds of C. vulgaris biomass, and therefore a drying method should be selected carefully
depending on the end use of the biomass.
|
|
| Date |
2021
|
|
| Type |
Article
PeerReviewed |
|
| Format |
pdf
|
|
| Language |
en
|
|
| Identifier |
http://ir.cftri.com/14807/1/Journal%20of%20Applied%20Phycology%202021.pdf
Madhubalaji, C. K. and Sandeep, N. Mudliar and Chauhan, V. S. and Sarada, R. (2021) Evaluation of drying methods on nutritional constituents and antioxidant activities of Chlorella vulgaris cultivated in an outdoor open raceway pond. Journal of Applied Phycology. |
|