Specification of George Rydill : purifying sewage, &c.

  • Rydill, George.
Date:
1875
Catalogue details

Licence: Public Domain Mark

Credit: Specification of George Rydill : purifying sewage, &c. Source: Wellcome Collection.

    10/14 (page 8)
    Ry dill's Impts. in Machinery and Materials for Rurifying Sewage, fyc. I cover with clinker or coarse ashes, and then with a coating or layer of sieved, ground, or crushed ashes, or the pierced openings may be covered with small stones or pebbles and then with a coating of sieved, ground, or crushed coal, fire ashes, or other porous substances, and I connect an air pump or engine by means of pipes and valves with the chamber or 5 chambers for the purpose of pumping out the air to form a vacuum, so that any required quantity of polluted waters may be purified and passed through the filter bed. I further construct a vessel of cast or wrought iron, or any other suitable material, containing a chamber near its bottom, and the outlet 10 from the chamber is through a pipe and valve, which valve can be closed at pleasure so that on the sewage dye and polluted waters not passing through the filter beds in required quantity the valve is closed and the air is pumped out of the chamber with an air pump or engine to form a vacuum, and when the chamber is filled with water forced 15 through the filter bed by the pressure of the atmosphere the valve in the outlet pipe is opened ; also a valve fixed in a small air pipe which leads from the chamber to the height of the vessel, so that on the air valve being opened in the small pipe the air rushes into the chamber and allows the water to run out through the outlet pipe. When the 20 chamber is emptied the valve in the outlet pipe is closed, also the valve in the air pipe, and the air pump or engine is again set to work to pump out the air, so that the chamber may be again filled and emptied as before. If a large stream of sewage water or a polluted stream or river has 25 to be treated I construct a kind of reservoir or reservoirs, canal or canal-like channels with a chamber any required length or width along the side of the river bank leaving sufficient strength of embankment or support between the two. I prefer to construct the reservoir or canal¬ like channel near to a weir or falling ground, where the outlet could be 30 got below the inlet to prevent the purified waters from being lifted or forced from the chamber by a pump. But to make it clearly understood I will describe the construction of this reservoir or channel as made along the side of a polluted river bank, and the whole of the purified waters requiring to be pumped from the chamber, I excavate a reservoir 35 or canal-like channel the depth or below the bed of the river, and I prefer to invert the bottom or flag or pave the bottom, and wall the sides and ends any required height for a chamber area. I then construct