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Pollution problems in selected food industries (excludes meat, poultry and grain-based foods)
1971
Hydraulics of long vertical conduits and associated cavitation
1971
Vaidyaraman, P. P. | Chu, C. S.
Experimental studies were undertaken to examine the flow in long vertical conduits with particular reference to the design of storm water drop shafts. A distinguishing characteristic of such flow is the potential cavitation regime. Its existence depends upon the design of the structure. The cavitation regime will develop when the conduit is sufficiently long and the head sufficiently large. It can also be generated at a lower head if a control valve is installed in the supply line so that the net head can be negative. If a small amount of air is introduced into the system, the cavitation region is eliminated, the pressure gradient is more uniform, and the flow consists of a uniform mixture of air and water.
Show more [+] Less [-]Oxygen regeneration of polluted rivers: the Passaic River
1971
Whipple, William
Recovery of floating oil rotating disk type skimmer
1971
Conversion of crankcase waste oil into useful products
1971
Maizus, Solfred | Urquhart, Kenneth
Dispatching system for control of combined sewer losses
1971
A survey of alternate methods for cooling condenser discharge water | System, selection, design, and optimization
1971
Smith, N. | Maulbetsch, John S.
Polymeric materials for treatment and recovery of petrochemical wastes
1971
Klein, Elias | Desai, Shyamkant V. | Smith, James K. | Weaver, Robert E. C.
Preliminary investigational requirements-petrochemical and refinery waste treatment facilities
1971
Jewell, William | Ford, Davis L.
Eutrophication of surface waters--Lake Tahoe Indian Creek Reservoir
1971
McGauhey, P. H. (Percy Harold) | Porcella, D. B. | Dugan, Gordon L.
The water impounded at Indian Creek Reservoir near Lake Tahoe, California is approximately one-third surface runoff and direct precipitation and two-thirds reclaimed water exported from South Tahoe Public Utility District Plant. Discussed are the results of tests which determined the temporal changes and relationships between water quality characteristics of Indian Creek Reservoir and those of the reclaimed water. Initially the reservoir would not support fish life, but as the reservoir matured, ammonia levels declined to less than 4 mg/l and by 1970 it was an excellent trout fishery. Approximately 70% of the ammonia nitrogen was lost to the atmosphere by nitrification-denitrification. Good biological productivity indicated access to other phosphorus sources, probably runoff. Relative to conductivity and chemical components the water is of good irrigation quality. Various parameters showed that the reservoir responds to more complex factors than those measurable in the reclaimed waste water, raising the question of the effectiveness of tertiary treatment for recreational impoundments.
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