Table 2: Composition of materials in each digester at different process variables.
Digester |
Parameter |
Substrate (kg) |
|
|
Cow Dung |
Pig Dung |
Poultry Droppings |
Chicken Rumen |
Pineapple Fruit Waste |
Water |
D1 |
F/I = 1:1 |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D2 |
F/I = 1:2 |
0.41 |
0.41 |
0.41 |
3.25 |
0.41 |
7.12 |
D3 |
F/I = 1:3 |
0.81 |
0.81 |
0.81 |
1.64 |
0.81 |
7.12 |
D4 |
F/I = 2:1 |
0.31 |
0.31 |
0.31 |
3.66 |
0.31 |
7.12 |
D5 |
F/I = 3:1 |
0.92 |
0.92 |
0.92 |
1.22 |
0.92 |
7.12 |
D6 |
T = 25°C |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D7 |
T = 30oC |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D8 |
T = 40°C |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D9 |
T = 50oC |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D10 |
T = 60oC |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D11 |
AG= 30 rpm |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D12 |
AG= 40 rpm |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D13 |
AG= 50 rpm |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D14 |
AG= 60 rpm |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
D15 |
AG= 70 rpm |
0.61 |
0.61 |
0.61 |
2.44 |
0.61 |
7.12 |
N.B: T=Temperature; F/I = Feed/Inoculum; AG = Agitation speed