Specification of Astley Paston Price : treating sewage.

  • Price, Astley Paston.
Date:
1870
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Astley Paston Price : treating sewage. Source: Wellcome Collection.

    6/10 (page 4)
    Trice's Improvements in the Treatment of Sewage, example, as lime, may be firstly added, and the solution of the phosphates he added subsequently, hut I prefer the former process ; or the soluble phosphates may he firstly decomposed by means of a base, such, for example, as lime, or carbonate of lime, or otherwise, and the resulting precipitate may he employed for the purpose of effecting the separation 5 of certain constituents of sewage- in conjunction with any of the before-mentioned methods of carrying out my Invention, deodorizing agents, such, for example, as animal or vegetable charcoal, may be employed, but good results will be obtained by the employment of the dissolved phosphates either alone or in con- 10 junction with a base, such as lime, as before mentioned. The sewage after treatment by either of the before-mentioned processes is allowed to settle, and the clear or supernatant water may be run off, and the deposit or precipitate collected and removed, and may be employed for agricul¬ tural purposes, either in the moist condition or after having been sub- 15 mitted to a drying or desiccating process; or the precipitated phosphates may be again submitted to the action of sulphuric acid or hydrochloric acid, or mixtures of the same, and the solution be again employed for the treatment of sewage in a manner similar to that before described. The proportions in which the soluble phosphates may be employed will 20 vary with the sewage to be operated upon and the quality of the manure desired to be obtained. I have obtained good results by the employment of about two parts by weight of the soluble phosphates to every one thousand parts by weight of sewage treated, but I do not limit myself to such pro- 25 portions. Having now described and particularly ascertained ascertained the nature of my said Invention, and the manner in which the same is or may be used or carried into effect, I would observe in conclusion that what I consider to be novel and original, and therefore claim as the Invention 30 secured to me by the herein-before in part recited Letters Patent is, the use of the natural phosphates herein-before mentioned, or mixtures of the same, for the treatment of sewage and for the production of manures, by firstly submitting such natural phosphates to the action of sulphuric acid, or of hydrochloric acid, or of mixtures of the same, and the 35 employment of such resulting products, either alone or in conjunction