Specification of Robert Stevenson Symington : apparatus for dealing with sewage, &c.

  • Symington, Robert Stevenson.
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Robert Stevenson Symington : apparatus for dealing with sewage, &c. Source: Wellcome Collection.

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    Provisional Specification. A.D. 1873.—N° 912. 3 Symington's Improvements in Apparatus for Dealmg with Sewage, fyc. be obtained by arranging one or more additional filtering compartments in the arched space. In some cases the combined receptacles for ashes, and for vegetable and animal refuse may be comprised within the lower part of the cast- 5 iron structure instead of being arranged beneath it. The improved apparatus is applicable not only for dealing with sewage or discharges from waterclosets, privies, kitchens, stables, byres, and the like, but also for dealing with any mixtures of water and solid im¬ purities, such as are ordinarily discharged from chemical or other 10 manufactories or public works into drains, sewers, or rivers. In a modification suitable for some public works a large fixed tank is constructed, by preference of a cylindrical form, and has placed within it a similar movable tank with a grated bottom to contain the ashes or other filtering medium. The impure water is admitted into a space 15 beneath the grated tank, and whilst solid matters can deposit on the bottom of the fixed tank the water filters up through the materials in the grated tank, and when these materials become saturated the grated tank can be lifted out, and one with fresh materials introduced. In some cases the water may be made to pass through two or more of 20 such filtering tanks in succession, with similar or different filtering materials in each, whilst the filtration may be made downwards in one tank and upwards in another. It will also in some cases be beneficial to cause the water to be exposed to the atmosphere, by falling in a broken manner through a sufficient 25 height before passing through the last filtering tank. LONDON: Printed by George Edward Eyre and William Spottiswoode, Printers to the Queen’s most Excellent Majesty. 1873.