Specification of Frederick Jacobsen : purification of sewage, &c.

  • Jacobsen, Frederik.
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Frederick Jacobsen : purification of sewage, &c. Source: Wellcome Collection.

    6/6 (page 4)
    Jacobsen’s Improvements in the Purification of Sewage. The supernatant water may in the case where the discharges of factories have to be treated, he used over again for rewashing rags, fibre, or other manufacturing purposes, and the sludge may be used for pre¬ cipitating fresh supplies of polluted discharges. Where sewage has to be treated, I dry the sludge and dispose of it for manurial purposes. 5 In order to facilitate and accelerate the subsidence, the following in¬ gredients may in certain cases be used, namely, common salt, sulphate of zinc, chloride of iron, perchloride' of iron. I find in practice also that alum rock, alum schist, or alum sludge, slaked lime, and the water drawn from electric batteries may be used advantageously to facilitate 10 and accelerate such subsidence. The ingredients severally before mentioned may be added either singly or jointly, and either in a solid or soluble state to the precipitant. Having thus explained the nature of my Invention, and how I carry it into practical effect, I desire to say that I do not claim any apparatus 15 or construction of tanks for effecting the object herein-before set forth, but what I claim as novel and of my Invention is the using as a pre¬ cipitant of the sludge arising from the ley water of paper mills, as before mentioned, either alone or in combination with all or some one or more of the ingredients herein-before specified for the purification of 20 polluted waters in the manner before described or any mere modifi¬ cation thereof. In witness whereof, I, the said Frederick Jacobsen, have hereunto set my hand and seal, this Thirteenth day of January, Eighteen hundred and seventy-four. 25 FRED*. JACOBSEN, (l.s.) LONDON: Printed by George Edward Eyre and William Spottiswoode; Printers to the Queen's most Excellent Majesty. 1874.