Specification of William Parry and John Frearson : treating sewage.

  • Parry, William, 1817-1888.
Date:
1867
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Parry and John Frearson : treating sewage. Source: Wellcome Collection.

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    2 A.D. 18G7.—N 579. Provisional Specification. Parry ^ Frearson^s Improvements in Treating Sewage, The apparatus to be used in treating sewage, and which constitutes the second part of our Invention, is constructed as follows ;—In the tank or reservoir in which the sewage is treated, or in which after mixture with the clay, clay iron ore, or manganesic earth it is allowed to rest for the subsiding of the solid matter, we fix a flexible or a jointed pipe. The said pipe opens 5 at bottom into a conduit below the bottom of the tank or reservoir, and its top is supported by a float or buoy which keeps it at the top of the liquid. As the liquid rises and falls the top of the pipe rises and falls with it. The said pipe is furnished with valves at top and bottom, by opening which the liquid can be run off, and by closing which the liquid is retained in the tank or 10 reservoir 5 a floating scum board or guard for keeping corks and floating bodies from the pipe surrounds the top of the pipe. In using this apparatus the valves are closed during the filling of the tank or reservoir, and during the subsiding of the solid matter. When the water of the sewage has become sufficiently clear the valves are opened and it is drawn off. 15 LONDON: Printed by Geokge Edward Eyre and William Spottiswoode, Printers to the Queen's most Excellent Majesty. 1867.