boue (4) taux (4) Toilets (4) Outhouses (4) laboratoire (3) Process (Law) (3) Addition (3) additif (2) biodégradation (2) commune (2) humidité (2) modélisation (2) modèle (2) matériau (2) environnement (2) effet (2) Afrique (2) Treatment (2) Moisture (2) Additives (2) Rates (2) South Africa (2) Nature and nurture (2) Moisture (2) Models and modelmaking (2) Modeling (2) Mass (2) Industrialists (2) Example (2) Examinations (2)