Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2008 by Universidad Católica de Valparaíso -- Chile
Vol. 11 No. 2, Issue of April 15, 2008
 


Table 5. Effect of sulfide removal by Alcaligenes sp. T307 in sulfide medium on biogas production over 5 days incubation.


Parameter (mg L-1)*

Control

Pre-treated by T307

 Effluent pH

8.76 ± 0.28

8.37 ± 0.10

 Effluent total sulfide

70.8 ± 1.70

12.1 ± 0.20

 Effluent dissolved sulfide

14.7 ± 0.57

10.0 ± 0.27

 Effluent H2S

1.0 ± 0.15

1.1 ± 0.16

 Effluent sulfate

100.5 ± 6.36

143 ± 4.24

 Influent COD

5790 ± 61.47

4890 ± 49.1

 Effluent COD

3670 ± 56.57

2465 ± 39.5

 COD reduction (%)

36.62 ± 0.98

49.60 ± 1.01

 Biogas produced (ml L-1d-1)

85.5 ± 32.96

240 ± 24.86

 Biogas composition

 

 

 % CH4

35.47 ± 12.99

48.06 ± 7.15

 % CO2

63.67 ± 13.29

51.53 ± 7.18

 % H2S

0.86 ± 0.69

0.41 ± 0.3

 Specific yield of CH4 (ml g-1 COD removed)

71.53 ± 18

237.81 ± 17

*Unless stated, mean value and standard deviation of six determinations


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