Two-stage activated sludge pilot-plant operations at Fitchburg, Massachusetts.
D005374:Filtration; D007220:Industrial Waste; D008404:Massachusetts; D008722:Methods; D009584:Nitrogen; D010710:Phosphates; D012722:Sewage; D014876:Water Pollution / Q000517:prevention & control; D014877:Water Pollution, Chemical / Q000517:prevention & control; D014881:Water Supply
D007220:Industrial Waste; D010710:Phosphates; D012722:Sewage; D009584:Nitrogen