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Table 4 Confirmation hydrogen production experiments

From: Bioaugmentation of Lactobacillus delbrueckii ssp. bulgaricus TISTR 895 to enhance bio-hydrogen production of Rhodobacter sphaeroides KKU-PS5

Run

Condition

X1 initial pH

X2 light intensity (klux)

X3 Mo concentration (mg/L)

HPR (ml H2/L h)

HY (mol H2/mol glucose)

Cumulative H2 production (ml H2/L)

1

Optimum

7.92

8.37

0.44

9.1 ± 0.2

9.65 ± 0.23

3396 ± 66

2

Lower

7.00

6.00

0.10

6.3 ± 0.1

8.14 ± 0.12

2726 ± 39

3

Upper

9.00

10.00

0.50

6.9 ± 0.1

8.20 ± 0.20

2585 ± 53

4

Central

8.00

8.00

0.30

8.7 ± 0.1

9.46 ± 0.19

3253 ± 20

  1. HPR hydrogen production rate, HY hydrogen yield