Research Article
Evaluation of Occurrence, Concentration, and Removal of Pathogenic Parasites and Fecal Coliforms in Three Waste Stabilization Pond Systems in Tanzania
Table 4
Parasite concentrations and removal in the Iringa WSP system.
| Parasite group | Parasite species | Treatment stage | Raw wastewater | Anaerobic ponds | Facultative pond | Maturation ponds |
| Helminth species concentrations (eggs/L) | Ascaris lumbricoides | 10 | 3 | 0 | 0 | Hookworm | 9.5 | 0 | 0 | 7.5 | Trichuris trichiura | 20 | 4.5 | 0 | 0 | Trichostrongylus spp | 10 | 4.5 | 0 | 0 | Fasciola spp | 0 | 0 | 0 | 0 | Taenia spp | 0 | 0 | 0 | 0.25 | Total helminth concentration (eggs/L) | | 49.5 | 12 | 0 | 7.75 | Helminth removal at each stage (%) | | | 75.8 | 100 | No reduction | Helminth removal from raw wastewater (%) | | | 75.8 | 100 | 85 | Protozoa species concentrations ((oo)cysts/L) | Giardia lamblia | 0 | 0 | 0 | 0 | Entamoeba coli | 582.5 | 49.3 | 7.5 | 0.75 | Entamoeba histolytica/dispar | 72 | 6 | 0 | 0 | Cryptosporidium spp | 15 | 0 | 2 | 0.25 | Isospora spp | 0 | 0 | 0 | 0 | Total protozoa concentrations ((oo)cysts/L) | | 669.5 | 55.3 | 9.5 | 1 | Protozoa removal at each stage (%) | | | 91.7 | 82.8 | 89.5 | Protozoa removal from raw wastewater (%) | | | 91.7 | 98.6 | 99.9 |
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