Research Article
Evaluation of Occurrence, Concentration, and Removal of Pathogenic Parasites and Fecal Coliforms in Three Waste Stabilization Pond Systems in Tanzania
Table 3
Parasite concentrations and removal in the Mwanza WSP system.
| Parasite group | Parasite species | Treatment stage | Raw wastewater | Anaerobic ponds | Facultative ponds | Maturation ponds |
| Helminth species concentration (eggs/L) | Ascaris lumbricoides | 19 | 0 | 0 | 0 | Hookworm | 32 | 1.8 | 0.8 | 0.2 | Trichuris trichiura | 0 | 0 | 0 | 0 | Trichostrongylus spp | 8 | 0.4 | 12.2 | 2.3 | Fasciola spp | 8 | 0 | 0 | 0 | Taenia spp | 0 | 0 | 0 | 0 | Total helminth concentration (eggs/L) | | 67 | 2.2 | 13 | 2.5 | Helminth removal at each stage (%) | | | 96.7 | No reduction | 80.8 | Helminth removal from raw wastewater (%) | | | 96.7 | 80.6 | 96.2 | Protozoa species concentrations ((oo)cysts/L) | Giardia lamblia | 9 | 1.6 | 0.2 | 0 | Entamoeba histolytica/dispar | 80 | 3.2 | 0 | 0 | Entamoeba coli | 127 | 5.6 | 1 | 0 | Cryptosporidium spp | 12 | 1.6 | 0.6 | 0.3 | Isospora spp | 3 | 0 | 0 | 0 | Total protozoa concentration ((oo)cysts/L) | | 231 | 12 | 1.8 | 0.3 | Protozoa removal at each stage (%) | | | 94.8 | 85 | 83.3 | Protozoa removal from raw wastewater (%) | | | 94.8 | 99.2 | 99.8 |
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