Specification of John James Lundy : purifying sewage water.

  • Lundy, John James.
Date:
1870
Catalogue details

Licence: Public Domain Mark

Credit: Specification of John James Lundy : purifying sewage water. Source: Wellcome Collection.

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    Lundy's Improvements in .Purifying Sewage Water. performed, to be particularly described and ascertained in and by the following statement, that is to say :— This Invention relates to improvements in effecting the decolorisation, deodorisation, and purification of foul water and waste waters, such,-for example, as those waters which foul the streams and run to waste from 5 distilleries, dye works, paper works, and other manufactories, also of sewage and of sewage supernatant water, and consists in submitting them to what is known as the carbonaceous residuum or animal charcoal, which is produced and obtained in the manufactories of prussiate of potasln 10 In carrying out the first part of my Invention I filter the foul waste waters, or the sewage, or the sewage supernatant water obtained after the separation of the more solid portions of the sewage by mechanical means, or by allowing the same to subside in settling ponds by filtering the same through the animal charcoal before described by any of the well known 15 methods of filtration, the said animal charcoal being either mixed or not mixed with or placed in alternate layers or otherwise with cinders, coke, gravel, sand, stones, or any other suitable substance or substances singly or combined, whereby the filtering beds or tanks may be kept more open according to the rapidity of the filtration required, or to the density or 20 specific gravity of the water requiring to be decolorised, deodorised, or purified. In carrying out the second part of my Invention I cause the foul water, waste waters, supernatant sewage water, or sewage to be mixed up with the before-mentioned animal charcoal by being stirred up 25 therein, whereby after the animal charcoal has been allowed to subside or precipitate the supernatent water will be found to be decolorised and deodorised. In carrying out this part of my Invention the amount of animal charcoal to be employed will be dependent on the degree of impurity of SO the waters or sewage to be treated. As nearly every foul water requiring purification will vary according to the manufacture it has been previously used for in the various ingredients it contains or in its specific gravity; and as the animal charcoal can be re-employed, I prefer to add to the first foul water operated upon an excess of the aforesaid animal charcoal 35 over and above what is actually necessary to attain the desired degree of decolorisation or deodorisation, I also prefer to wet the charcoal with a