Ключевые слова: active, aerial, aerobic, aerotank, bacterium, basin, biological, chemical, circular, cleaning, dirty, drone, ecology, effluent, environment, environmental, evening, facility, factory, filtration, flow, graywater, green, industrial, industry, liquid, modern, plant, pollution, pool, process, processing, purification, purity, recycling, reservoir, round, sanitary, sedimentation, separation, sewage, sewer, sludge, sunset, tank, treatment, view, waste, wastewater, water,