élimination (2) province (2) effluent (2) Afrique (2) Care (2) Water (2) South Africa (2) Sewage disposal plants (2) Sewage (2) Effectiveness (2) province (2) turbidité (1) norme (1) risque (1) pollution (1) séparation des masses (physique) (1) gène (1) désinfection (1) chlore (1) chloration (1) méthode (1) taux (1) survie (1) Cysts (1) Treatment (1) Methods (1) Digests (1) Identification (1) Water--Purification--Rapid sand filtration (1) Cryptosporidium parvum (1)