| 
      
        | Factor | Name | Level |  
        |   | 1 | 2 | 3 |  
        | Time (day) | F1 | 10 | 20 | ----- |  
        | Salt (g) | F2 | 0.001 | 0.01 | 0.05 |  
        | Activated sludge (ml) | F3 | 0.02 | 0.01 | 0 |  
        | Bacteria (ml) | F4 | 0 | 0.01 | 0.02 |  
        | Composting (g) | F5 | 0.001 | 0.005 | 0 |  
        | Molasses  | F6 | 0.001 | 0.01 | 0 |  
        | Humidity (ml) | F7 | 0.05 | 0.1 | 0.25 |  
        | Urea (g) | F8 | 0 | 0.001 | 0.005 |  |