Ключевые слова: aerial, blackwater, chemical, circle, circular, clean, construction, dirty, ecology, ecosystem, effluent, engineering, environment, environmental, facility, factory, filtration, green, industrial, industry, liquid, plant, pollution, pool, process, purification, purified, purity, recycle, recycled, recycling, reservoir, round, sedimentation, separation, sewage, sewage treatment, sewer, sewerage, sludge, storage, system, tank, technology, treatment, urban, view, waste, wastewater, water,