demonstration of biogas production using low moisture content

Volatile Solids (dry weight basis) Volatile Solids Daily Biogas Production for Field Experiment Pit No. I
Experiment 1 Pit II Time (days) Production ft. 3 Production m 3
1 2 3 4 5 Avg. 1 2 3 4 5 Avg. 7/28/99 0 0
45% 49.20% 48.00% 49% 48.80% 48.00% 31.50% 42.60% 43.80% 45.30% 46.50% 41.94% 7/31/99 625 17.72
8/1/99 625 17.72
Experiment 2 8/2/99 625 17.72
1 2 3 4 5 Avg. 8/3/99 625 17.72
44% 45.30% 46.50% 32% 42.60% 41.94% Field Experiment Data 8/6/99 625 17.72
Avg. Moisture Content of Manure in Pit II: 14.32% 8/7/99 625 17.72
Experiment 3 8/8/99 625 17.72
1 2 3 4 5 Avg. Desired Moisture Content of Manure/Water in Pit II: 60-65% 8/9/99 625 17.72
30.62% 32.99% 32.02% 32.12% 32.32% 32.01% 8/10/99 625 17.72
Density of Manure: .673g/cm cu. 8/12/99 625 17.72
Pit I 8/13/99 625 17.72
1 2 3 4 5 Avg. Weight of Water: 62.4 lbs./ ft. cu. 8/14/99 625 17.72
30.62% 32.99% 32.02% 32.12% 32.32% 32.01% 8/15/99 625 17.72
Weight of Manure: .673 x 62.4 = 42 lbs./ ft. cu. 8/15/99 833 23.61
Field Experiment Data 8/16/99 833 23.61
Avg. Moisture Content of Manure in Pit I: 20% Total Available Volume of Pit II: 3,200 ft. cu. 8/17/99 833 23.61
8/18/99 833 23.61
Desired Moisture Content of Manure/Water in Pit I: 60-65% Total Wet Weight of Manure in Pit II: 3,200 x 42 = 134,000 lbs. 8/23/99 833 23.61
8/24/99 833 23.61
Density of Manure: .673g/cm cu. Total Dry Weight of Solids in Pit II: 134,000 lbs x .1432 = 114,811lbs 8/25/99 833 23.61
8/26/99 833 23.61
Weight of Water: 62.4 lbs./ ft. cu. Total Weight of Volatile Solids in Pit II: 114,811 x 41.94% = 48,151 lbs 8/31/99 833 23.61
9/1/99 833 23.61
Weight of Manure: .673 x 62.4 = 42 lbs./ ft. cu. Grams of Voltatile Solids = 48,151 lbs / 2.2(lbs/Kg) = 21,887 Kg x 1000 = 21,887,000 g 9/2/99 833 23.61
9/3/99 833 23.61
Total Available Volume of Pit I: 3,200 ft. cu. 9/20/99 833 23.61
9/21/99 500 14.17
Total Wet Weight of Manure in Pit I: 3,200 x 42 = 134,000 lbs. 9/22/99 500 14.17
9/23/99 500 14.17
Total Dry Weight of Solids in Pit I: 134,000 lbs x .20 = 107,000lbs 9/24/99 500 14.17
9/25/99 500 14.17
Total Weight of Volatile Solids in Pit I: 107,000 x 32.01% = 34,250 lbs 9/29/99 500 14.17
9/30/99 500 14.17
Grams of Voltatile Solids = 34,250 lbs / 2.2(lbs/Kg) = 15,569 Kg x 1000 = 15,569,000 g 10/1/99 500 14.17
10/2/99 500 14.17
Total biogas Production for Pit I: 25,000 ft. cu. 10/3/99 500 14.17
10/4/99 500 14.17
35.28 ft. cu. = 1 m cu. 10/6/99 500 14.17
10/7/99 500 14.17
25,000 ft. cu. / 35.28 = 708.6 m cu. 10/8/99 500 14.17
10/9/99 500 14.17
1,000 L = 1 m cu. 708.6 x 1,000 = 708,600 L 10/10/99 500 14.17
10/11/99 500 14.17
708,600 L / 20,400,000 VS = .03474 L / g VS 10/13/99 500 14.17
g
10/14/99 416 11.79
10/15/99 416 11.79
10/16/99 416 11.79
10/17/99 416 11.79
10/18/99 416 11.79
10/19/99 416 11.79
10/23/99 0 0.00
0.2500
60% Moisture Experiment 3
0.2500
80% Moisture Experiment 3
Production (L/g VS)
0.2000
0.1500
0.1000
0.0500
Rep 1
Rep 2
Rep 3
Production (L/g VS)
0.2000
0.1500
0.1000
0.0500
Rep 1
Rep 2
Rep 3
25
22.5
Field Experiment (Pit 1)
0.0000
Production (L/g VS)
0.2500
0.2000
0.1500
0.1000
0.0500
0 50 100 150 200 250 300
Time (days)
70% Moisture Experiment 3
Rep 1
Rep 2
Rep 3
0.0000
Production (L/g VS)
0.2500
0.2000
0.1500
0.1000
0.0500
0 50 100 150 200 250 300
Time (days)
95% Moisture Experiment 3
Rep 1
Rep 2
Rep 3
Production (m cu. / day)
20
17.5
15
12.5
10
7.5
5
2.5
0
7/19/99 8/8/99 8/28/99 9/17/99 10/7/99 10/27/99 11/16/99
Time (days)
0.0000
0 50 100 150 200 250 300
Time (days)
0.0000
0 50 100 150 200 250 300
Time (days)