Skip to main content

Currently Skimming:

C Water-Mitigation Techniques
Pages 249-253

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 249...
... Typically, this is a countercurrent flow of air, which enhances radon removal. The treated water is collected in a reservoir below the tower and pumped to a pressurized storage tank or directly into the distribution system.
From page 250...
... Diffused bubble aeration Spray aeration Tray aeration Jet aeration Shallow-tray aeration Cross-current packed-tower aeration Cascade aeration Pressure aeration Slat-tray aeration Venturi or ejector aeration Sieve tray aeration Aeration in hydrophor degasification although more difficult and expensive to produce, provide a greater surface area per unit volume over which mass transfer can occur. In the most common systems, the water passes through a series of tanks (0.5-6 m deep)
From page 251...
... Cascade Aeration Cascade aeration, a very simple technology, involves construction of a series of steps over which water tumbles as in a waterfall. The system requires a hydraulic head to operate, but little else except a method of ventilation to remove the radon-contaminated air from the unit.
From page 252...
... have observed Resorption of radon during and immediately after backwashing, but the radon progeny remain sorbed. When the efficiency of a GAC unit in removing radon from water begins to decline (Lowry and others 1991; Kinner and others 1989; Kinner and others 1990; Kinner and others 1993; Cornwell and others 1999)
From page 253...
... The raw water passes along one side of a series of microporous membranes. A stream of air induced by a vacuum passes along the other side.


This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More information on Chapter Skim is available.