Specification of Thomas Short : purifying sewage.

  • Short, Thomas.
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Thomas Short : purifying sewage. Source: Wellcome Collection.

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    Shoi't's Improvements in Apparatus for Purifying Sewage. My improved apparatus is designed for being applied in tlie course of any main sewer, a certain length of such sewer being removed for the reception of the apparatus, which I proposed to construct principally of cast iron. The apparatus comprises two chambers or compartments peculiarly 5 contrived and fitted with the view of promoting the deposition of suspended matters^ and the sewage water is allowed to flow through one of these chambers when the deposits are being removed from the other. The water before finally leaving the apparatus is made to pass through quantities of animal or other suitable charcoal contained in cages 10 arranged so that they can be easily removed for emptying and refilling. The flow of the sewage water in the apparatus is temporarily retarded by the action of a water wheel which it is made to drive on entering, but the force imparted to the water wheel is utilised in working a pump and in restoring a large proportion of velocity to the purified water as it leaves 15 the apparatus. And in order that my said Invention and the manner of performing the same may be properly understood, I hereunto append a Sheet of explanatory Drawings to be herein-after referred to and representing a modification of my improved apparatus suitable for a main sewer of 23 about three feet eight inches internal diameter. In these Drawings the same reference numerals are used to mark the same or like parts where- ever they are repeated. Figure 1 is a side view and Figure 2 is a plan, whilst Figures 3, 4, 5, are transverse vertical outlines, internal parts being indicated by blue 25 lines in all the Figures. The apparatus is formed with a flanged inlet 1 at what is represented as the left-hand end for connection to the main sewer in the course of which it is to be placed, and just within this inlet there is formed a chamber or enlargement 2 having fitted within it a paddle wheel 3 which 30 the sewage water turns on entering, losing much of its velocity in doing so. After passing the wheel the water proceeds by a deepening passage 4 to the entrances to two passages 5, 6, commanded by sluices 7, only one of which is in general open at a time. Most of the chambers and spaces herein-after to be described are in duplicate and separated from each 35 other by a longitudinal vertical partition 8 extending almost the entire length of the apparatus, and it will only be necessary to describe one