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Sewage disposal.

Date
1926
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Licence

Public Domain Mark
You can use this work for any purpose without restriction under copyright law.
Public Domain Mark (PDM) terms and conditions https://creativecommons.org/publicdomain/mark/1.0
Credit: Sewage disposal. Public Domain Mark

About this work

Description

Outline of domestic collecting system; disposal into the sea; direct, via tidal storage tanks. Purification by Imhoff tank and sprinkling filters. Purification by sand filtration.

Publication/Creation

England, 1926.

Physical description

1 encoded moving image (13.30 min.) : silent, black and white

Duration

00:13:30

Copyright note

Copyright previously held by British Medical Association and assigned to Wellcome in 2005

Terms of use

Unrestricted
Public Domain Mark

Creator/production credits

Production details unknown.

Notes

The film begins and ends abruptly, suggesting the beginning and end may be lost. Documentation states the film duration is 17 minutes.

Contents

Segment 1 The process of collecting waste from homes and industry is explained using an animation of a town and its sewage pipes. The main, collecting sewer is shown leading away from the town. Direct disposal of sewage into the ocean is shown using a map. A pipe is shown leading onto the sea bed, and the intertitles note that where the water is shallow, sewage is stored in tanks and discharged with the ebbing tide. Shots of the ocean follow. Next, the process of sewage purification is shown. An animation shows the process of sewage travelling down the collecting sewer into the purification plant. Each aspect of the purification plant is looked at. First, the screens, which filter the water as it passes through them. These are shown and also an animation explains how they work. Rotating screens follow, which remove finer solids. Next, the Imhoff tank is looked at. An animation shows how they work. Time start: 00:00:00:00 Time end: 00:06:41:09 Length: 00:06:41:09
Segment 2 Next, the sludge beds are explained. The solid waste is shown being carted away. The liquid sewage is further purified by sprinkling filters, and these are explained in an animation. The intertitles describe how to use them efficiently. Finally, after passing through the purification plant, the filtered sewage is passed into a brook and further purified by sand filtration. An animation explains how the sand filtration works. The water is tested and looked at under a microscope. The brook water is also tested. Time start: 00:06:41:09 Time end: 00:13:30:16 Length: 00:06:49:07

Type/Technique



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