industrial waste water treatment facility with yellow sediment in concrete tank

acid aerated atmospheric basin biological building built cement chemical circle circular cloud concrete contamination control danger dangerous design detox dirty district drainage dramatic engineering equipment facility factory filtration flowing flushing haze industrial industry iron issues liquid machine machinery material outdoor outdoors overflowing pipe pipeline place plant pollution process processing purifier rationing recycle recycled recycling reinforced research reservoir reservoirs room running safety sediment sedimentation sewage sky social spilling storage supply surface tank technology toxic treatment tube wall waste water white yellow