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Table 3 Carbohydrate composition of Scenedesmus acutus biomass after 30 or 180 days of wet anaerobic storage

From: Assessing the stability and techno-economic implications for wet storage of harvested microalgae to manage seasonal variability

Experimental condition

Length of storage (days)

Glucan (%, db)

Galactan (%, db)

Mannan (%, db)

S. acutus—t0 1

0

26.9 ± 0.04a

3.7 ± 0.3a

8.1 ± 0.1a

Anaerobic*

30

22.8 ± 1.1b

1.9 ± 0.2b

8.3 ± 0.1ab

180

23.5 ± 0.7b

1.3 ± 0.05b

8.7 ± 0.2b

Sulfuric acid (0.5%, db)*

30

19.2 ± 0.01c

1.3 ± 0.1b

8.4 ± 0.05ab

180

19.9 ± 0.04c

1.3 ± 0.04b

8.2 ± 0.01a

p value

 

< 0.001

< 0.001

0.018

S. acutus—t0 2

0

21.9 ± 0.4a

3.1 ± 0.1a

8.7 ± 0.3a

Glycosidase*

30

15.2 ± 0.3b

0.9 ± 0.01b

8.7 ± 0.01a

180

10.7 ± 0.01c

1.0 ± 0.00b

7.1 ± 0.02b

Glucose oxidase*

30

12.5 ± 0.2d

1.3 ± 0.1b

8.1 ± 0.2a

180

5.7 ± 0.2e

1.2 ± 0.0b

7.0 ± 0.3b

p value

 

< 0.001

< 0.001

< 0.001

  1. * Biological replicates (n = 3) were combined to accommodate all analyses. Variation is represented by standard deviation or analytical replicates (n = 2). Letters represent statistically distinct values as determined by Tukey’s test
  2. 1,2Harvest 1 and 2