خيارات البحث
النتائج 81 - 90 من 113
Mayfly distribution as a water quality index
1970
Fremling, Calvin R.
Bactericidal effects of algae on enteric organisms
1970
Davis, Ernst M. | Gloyna, Earnest F.
Retention basin control of combined sewer overflows
1970
Feasibility of computer control of wastewater treatment
1970
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.
اظهر المزيد [+] اقل [-]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.
اظهر المزيد [+] اقل [-]Control of infiltration and inflow into sewer systems
1970
Treatment techniques for removing phosphorus from municipal wastewaters
1970
Convery, John J.
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
