Table 4. Microorganisms groups observed in sewage sludge samples throughout the anaerobic digestion.
Microorganisms groups |
Operation time (d) |
|||
- |
0 |
20 |
40 |
60 |
Protozoa |
- |
- |
- |
- |
Eimeria spp. |
+ |
+ |
+ |
+ |
Entamoeba spp. |
+ |
- |
- |
- |
Helminth |
- |
- |
- |
- |
Ascaris spp. |
+ |
+ |
- |
- |
Trichuris spp. |
+ |
- |
- |
+ |
Toxocara spp. |
+ |
+ |
+ |
- |
Hymenolepis spp. |
- |
+ |
- |
- |
Mites |
++ |
++ |
+ |
+ |
(-) absence of microorganisms. Protozoa: (+) 1 to 5 cysts or oocysts per slide. Helminth: (+) 1 to 2 eggs per slide, (++) 3 to 10 eggs per slide. |
|