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Home > Proceedings of the Annual Convention of the American Water Works Association Volume 23-24: (English)
Proceedings of the Annual Convention of the American Water Works Association Volume 23-24: (English)

Proceedings of the Annual Convention of the American Water Works Association Volume 23-24: (English)

          
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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...animal or vegetable matter of a malignant nature into harmless minerals, thereby removing all disease producing organic and inorganic matter. The water leaving the lower surface of the upper filter passes in drops like rain through the open air a distance of ten feet, and strikes upon the water or surface of the lower bed, causing the globules to splash and rebound similar to rain upon a roof or pavement. The globules in their descent are thoroughly aerated and benefitted by the light, while all gases are expelled into the atmosphere, and, should there lie organic matter in the globules it would be burned up or oxidized by its contact with the oxygen of the air. The water collected on lower filter beds dropped there from upper filter beds, has the benefit of electric action due to falling drops of water in contact and concussion. The water is usually 6 inches to 12 inches in depth. The shallow depth is penetrated by the purifying rays of light. The water passes by gravity through the lower filter beds again in contact with the nitrifying micro organisms within the beds supplied with air having proper inlet and outlets for its circulation. After the water has been cut off a compartment, and the surface of the filter beds been exposed to the action of air and light, it soon becomes thoroughly dry when the gelatinous deposit and sediment upon it together with % to Y inch of sand, is removed and is placed on sand pile for subsequent cleansing and re-using on beds. Some of the deposit has been used as a fertilizer. Fresh sand is employed to replace the small quantity that has been removed. The body of the beds do not require cleaning or renewing at any time, and seldom require spading or forking. The surface of the lower bed seldom requires cleaning or renewal. ...


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Product Details
  • ISBN-13: 9781130304084
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 330
  • Series Title: English
  • Weight: 590 gr
  • ISBN-10: 1130304086
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 18 mm
  • Width: 189 mm


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Proceedings of the Annual Convention of the American Water Works Association Volume 23-24: (English)
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