Volume of Sludge from 1,000,000 Gallons of Sewage
Diagram illustrating the volume of sludge obtained from 1,000,000 gallons of sewage by different methods of sewage treatment and sludge drying. Prepared by the City of Philadelphia's Department of Public Works, Bureau of Surveys, Sewage Disposal System
This item is part of the 1914 Report on the Collection and Treatment of the Sewage of the City of Philadelphia, which can be viewed here along with two preliminary reports from 1911 and 1912. To see other illustrations from this report, click “1914 Sewage Treatment Plan” in the Subject list.