demonstration of biogas production using low moisture content

Results and Discussion
* Using LSD comparisons, mean biogas production rates with same letters are not significantly
different (α =0.05).
Table 2. Biogas production rates and other gas concentrations for Experiment 2,
conducted using LDPE containers at 35° C (95° F).
Treatment (%
Moisture)
Biogas Production Rate Gas Concentrations (%)
Mean (L/g
VS)*
St. Dev. Nitrogen (N 2 )
%
Methane
(CH 4 ) %
Carbon Dioxide
(CO 2 ) %
Water (H 2 O)
%
35% Moisture
Content
50% Moisture
Content
0.00 a 0..00 NA 4.5 NA NA
1.248 E-02 b 3.03 E-03 NA BD NA NA
57.5% Moisture
Content
65% Moisture
Content
1.920 E-02
bc
2.848 E-02
cd
4.80 E-03 NA BD NA NA
6.34 E-03 NA 3.14 NA NA
72.5% Moisture
Content
80% Moisture
Content
3.64 E-02 d 1.55 E-02 NA .23 NA NA
4.80 E-02 e 4.66 E-03 NA 2.97 NA NA
NA=not analyzed BD=below detection limit
* Using LSD comparisons, mean biogas production rates with same letters are not significantly
different (α =0.05).
Table 3. Biogas Production Rate and other gas concentrations for Experiment 3.
Treatment (%
Moisture)
Biogas Production Rate Mean Gas Concentrations (%)
Mean (L/g
VS) *
St. Dev. Nitrogen (N 2 )
%
Methane
(CH 4 ) %
Carbon Dioxide
(CO 2 ) %
Water (H 2 O)
%
50% Moisture
Content
60% Moisture
Content
70% Moisture
Content
80% Moisture
Content
4.57 E-03 a 3.98 E-03 67.85 6.57 23.6 2.47
1.15 E-01 b 3.97 E-02 7.68 58.93 28.45 4.96
1.45 E-01 b 3.19 E-02 10.7 60.16 27.02 2.12
1.33 E-01 b 8.83 E-03 11.67 52.48 32.85 3.0
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