Specification of Henry Young Darracott Scott : treating sewage water.

  • Scott, H. Y. D.
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Henry Young Darracott Scott : treating sewage water. Source: Wellcome Collection.

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    Provisional Scott’s Improvements in Treating Sewage Water. or chloride of iron or alumina. This will again occasion a precipitate, which is to be allowed to deposit in tank No. 2. As much of the preci¬ pitant is added as will nearly but not quite neutralize the alkalinity of the water. The effluent from tank No. 2 is next sufficiently acidified with 5 hydrochloric acid or oil of vitriol to change the color of delicate litmus paper. The above treatment of sewage water colored by dyes will have the effect of rendering the water colourless as well as free from suspended matters. 10 In lieu of using salts of iron or alumina I sometimes obtain the precipitant for tank No. 2 by digesting animal charcoal prepared either from bones or resulting from the manufacture of prussiate of potash with hydrochloric or muriatic acid, and I add the solution thus obtained either separately or in conjunction with the charcoal to the sewage 15 water, or again I sometimes dissolve impure phosphates or either of the above acids, and add the solution thus obtained to the sewage water in tank No. 2. Although I prefer the above order of procedure it is not essential to the chief object of this Invention (viz., deodorization of dyes in sewage) 20 that tank No. 2 shall be employed, as the operations in tank No. 1 and No. 2 may be combined when the precipitant is of little value, and in certain cases the second operation omitted altogether. SPECIFICATION in pursuance of the conditions of the Letters Patent, filed by the said Henry Young Darracott Scott in the Great Seal 25 Patent Office on the 18th May 1874. TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Henry Young Darracott Scott, of Ealing, in the County of Middlesex, Major-General, C.B., send greeting. WHEREAS Her most Excellent Majesty Queen Victoria, by Her 30 Letteis Patent, bearing date the Eighteenth day of November, in the year of our Lord One thousand eight hundred and seventy-three, in the thirty- seventh year of Her reign, did, for Herself, Her heirs and successors,