Environmental Engineering Reference
In-Depth Information
Ta b l e 4
Biogas (H
2
and CH
4
) yield and substrate degradation pattern observed during two stages of process integration [acidogenic (pH 6)/methanogenic
(pH 7) and photosynthetic (pH 7)] [6]
CH
4
yield (mol/kg
COD
R
)
Substrate degradation rate (kg
COD
R
/m
3
-day)
H
2
yield (mol/kg COD
R
)
Acidogenesis (or)
methanogenesis
Process Integration
Wastewater
Acidogenesis
Photo-fermentation Methanogenesis
Photo-fermentation
Acidogenesis +
Photo-fermentation
Designed synthetic
18.64
15.16
-
0.525
1.05
Methanogenesis +
Photo-fermentation
Designed synthetic
-
11.75
21.98
1.137
0.70
Acidogenesis +
Photo-fermentation
Diary based
8.26
13.70
-
0.263
1.34
Methanogenesis +
Photo-fermentation
Diary based
-
10.20
16.45
0.831
0.88
Acidogenesis +
Photo-fermentation
Chemical
11.12
8.23
-
0.306
0.84
Methanogenesis +
Photo-fermentation
Chemical
-
5.71
18.75
0.875
0.42
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