Subject(s): Sewage disposal - Developing countries. -- Sewage - Purification - Developing countries. -- TECHNOLOGY & ENGINEERING - Environmental - General. -- What is domestic wastewater and why treat it, excreta- related diseases, essential microbiology and biology, effluent quality, BOD removal kinetics, BATNEEC or CATNAP -- Domestic wastewater treatment options, flows and loads, preliminary treatment, waste stabilization ponds, anaerobic ponds, facultative ponds, maturation ponds -- Physical design of WSP, operation and maintenance of WSP, monitoring and evolution of WSP, wastewater storage and treatment reservoirs, constructed wetlands, upflow anaerobic sludge blanket reactors, biofiltration, simple activated sludge variants, wastewater re-use in agriculture, wastewater re use in aquaculture