An improved deodorizing, decolorizing, and filtering medium / [Owen Bowen].
- Bowen, Owen.
- Date:
- 1888
Licence: Public Domain Mark
Credit: An improved deodorizing, decolorizing, and filtering medium / [Owen Bowen]. Source: Wellcome Collection.
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Licence: Public Domain Mark
Credit: An improved deodorizing, decolorizing, and filtering medium / [Owen Bowen]. Source: Wellcome Collection.
![5 10 15 20 25 30 Date of Application, 20th Aug., 1887 Complete Left, 8th May, 1888 Complete Accepted, 8th June, 1888 A.D. 1887, 20^ August. N° 11,393. / PROVISIONAL SPECIFICATION. An Improved Deodorizing, Decolorizing, and Filtering Medium. We Owen Bowen of 66 Mark Lane in the City of London, Civil Engineer, and John Cobeldick of St. Piran’s, Stockwell Green, in the County of Surrey, Surveyor do hereby declare the nature of this invention to bo as follows :— This invention relates to an improved medium for use in filtering and deodorizing sewage, decolorizing dye waste, and for filtering purposes generally. In carrying out this invention, we make use of the shale to be found in the limestone quarries at Lyme Regis in Dorsetshire, and we mix it with ironstone and bituminous coal or coke, and calcine the mass in a kiln or retort. The proportions of the several materials are as follows :—Shale, 65 parts by weight ; ironstone or ore, 25 parts ; and bituminous coal or coke, 15 parts. The calcining may be effected readily in a kiln of the kind used for burning lime, and the materials may be arranged in layers in the kiln. The temperature may vary from 900 to 1200 degrees, and the calcining will usually be effected in from 4 to 6 hours. When sufficiently burnt, the mass is allowed to cool down, and the kiln is then drawn ; the material is then crushed in a suitable crushing mill, and is ready for use. We prefer to crush the material to such an extent that the largest pieces shall be about the size of a hazel nut, and the finest, dust. In laying a filter bed, we place the largest at the bottom and the dust at the top, and we cover the dust with perforated malting tiles. The filtration we prefer should be upward, especially in the case of sewage, the kinks for which will be suitably constructed for the purpose. The ironstone we find most useful for our purpose is that obtained in the Wellingborough district of Northamptonshire, as it contains a large quantity of alumina, with a large proportion of per-oxide of iron. To revivify the spent medium, we recalcine it with the addition of a fresh supply of the mixture of shale, ironstone, and coal, the proportions being about Jrd ot fresh material to about §rds of the spent medium. Dated this 20th day of August 1887. NEWTON & SON, Agents for the Applicants. [Priee 6d.]](https://iiif.wellcomecollection.org/image/b30740666_0001.jp2/full/800%2C/0/default.jpg)
