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Résultats 81-90 de 112
Feasibility of computer control of wastewater treatment
1970
Air quality criteria for carbon monoxide
1970
Relationship between concentration of carbon monoxide in the air and its adverse effects on man and the environment.
Afficher plus [+] Moins [-]An engineering-economic study of cooling pond performance
1970
Hogan, William T. | Liepins, A. A. | Reed, F. Everett
A procedure for predicting the temperature of a thermally loaded captive pond is presented. Using this information, the cooling pond is shown in a special case to have an economic advantage over a cooling tower and to be not much more expensive than a natural body (stream or ocean) of water. This, with the ecological and recreational assets of a captive cooling pond, would seem to encourage their expanded use with large thermo-electric power plants.
Afficher plus [+] Moins [-]Mayfly distribution as a water quality index
1970
Fremling, Calvin R.
Control of infiltration and inflow into sewer systems
1970
In-sewer fixed screening of combined sewer overflows
1970
Feuerstein, D. L.
Field sampling and measuring were conducted in conjunction with laboratory investigations on the characterization of combined sewage and the effects of solids removal on chlorination practices. Sixty combined sewage bulk samples and 60 combined sewage screenings samples retained on screens of 0.125-, 0.25-, 0.5-, and 1.0 in. aperture were analyzed and evaluated. Removals of deoxygenating materials, oils and greases, and bacteria by fixed screens placed in combined sewers were marginal. Reductions in chlorine requirements as a result of prior solids removal by fixed screening appear small. Screens with aperture sizes ranging from 0.0164 to 1.0 in. appear to have very little effect on bacterial concentrations.
Afficher plus [+] Moins [-]Use of new analytical methods in water resource development
1970
Investigation of a high-pressure foam wastewater treatment process
1970
Miller, James K. P. | Legatski, L. Karl
An electrochemical method for removal of phosphates from waste waters
1970
Sadek, Shafik E. | Brunner, C. A.
Toxic action of water soluble pollutants on freshwater fish
1970
Fromm, Paul Oliver
