Ключевые слова: aeration, bacteria, bioreactor, biosolids, chlorination, clarifier, decontamination, denitrification, digestion, discharge, ecosystem, effluent, environment, filtration, illustration, infrastructure, lagoon, nitrification, outfall, oxidation, plant, pollution, purification, recycling, sanitation, sedimentation, sewage, sludge, sustainability, treatment, ultraviolet, wastewater,