sewage treatment plant, industrial facility, water purification, biological tanks, aeration process, sludge digestion, effluent discharge, filtration systems, ultraviolet disinfection, chemical treatment, sedimentation basins, activated sludge, bacteria breakdown, waste management, environmental protection, clean water output, mechanical screens, grit removal, tertiary treatment, phosphorus removal, nitrogen control, odor control, energy-efficient pumps, sustainable design, wetlands, water cycle, effluent quality, monitoring station, full-body shot, technical structure, complex machinery, steel and concrete materials, daytime, clear sky, artificial lighting, educational illustration, cutaway view, detailed engineering drawing.