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The pollution of the Mediterranean Sea | Pacem in maribus
1972
Calder, Ritchie
Ecology and economics: controlling pollution in the 70s
1972
Air pollution and its control
1972
Sproull, Wayne T. (Wayne Treber)
The pollution potential in pesticide manufacturing
1972
Lawless, Edward W. | Von Rümker, Rosmarie | Ferguson, Thomas L.
Fluidic vortex bubble generator
1972
An engineering investigation and evaluation of vortex devices as bubble makers for use in the removal of suspended solids from wastewaters was conducted. Specific objectives included the development and test of bubble makers capable of generating bubbles having mean diameters of about 100 microns with vortex devices having minimum liquid passageways of 1/4 inch or greater. Bubbles having a mean diameter of 80 to 85 microns, with virtually no bubbles greater than 130 microns, were successfully produced. This mean size and size range are substantially the same as bubbles produced by pressurized water processes at similar operating pressures. Bubbles were produced both by aspirating atmospheric air directly into the vortex unit, and by aspirating atmospheric air at the suction side of the pump, dissolving it, and precipitating it or effervescing it at the vortex unit. Sufficient data now exist, however, to design vortex systems for direct functional tests in conventional air flotation systems.
Показать больше [+] Меньше [-]Pollution and the public conscience
1972
Ashby, Eric
North American reference encyclopedia of ecology and pollution | Ecology and pollution
1972
White, William | Little, Frank J.
Legal aspects of water pollution in New Jersey and Pennsylvania
1972
Basin management for water reuse
1972
Koenig, Louis
The project explored what is required and what happens if some or all of the sewage collected from a municipality is treated by advanced waste treatment (AWT) and put back in the water distribution system. Quality requirements and results of water reuse were examined by using computer programs for the preliminary design and costing of wastewater renovation by the lime-clinoptilolite-carbon processes of advanced waste treatment; for activated sludge treatment; and for pipeline conveyance of water. San Antonio, Texas was used as a specific case, at the two extremes of discharge all and reuse none and discharge none and reuse all. Costs for the conventional system and that reusing wastewater are discussed.
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