خيارات البحث
النتائج 71 - 80 من 113
Conceptual engineering report--Kingman Lake project
1970
Urban soil erosion and sediment control
1970
Chemical treatment of combined sewer overflows
1970
The oxygen uptake demand of resuspended bottom sediments
1970
Berg, Richard Harold
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.
اظهر المزيد [+] اقل [-]Investigative mine survey of a small watershed
1970
Aerated lagoon treatment of sulfite pulping effluents
1970
Amberg, Herman Robert | Aspitarte, T. R. | Coma, J. G. | Byington, K. | Ehli, J.
Weak washwater from a pulp mill, evaporator condensate from the spent liquor recovery system, and paper machine white water effluents were treated over a 17 month period in a secondary treatment plant consisting of 2 aeration basins. One basin was equipped with two 75 hp aerators and the other with six 25 hp aerators. Piping was designed to permit series and parallel operation of the two basins, and provisions were made to recycle treated waste. Series operation was superior to parallel operation for the wastes treated. The two 75 hp aerators were much more efficient in both mixing and aeration capacity than the smaller 25 hp units. An 80% BOD reduction in the system was achieved at a loading of 2.2 lbs BOD/hp-hr equivalent to a daily load of 16,000 lbs BOD. Total operating costs are discussed.
اظهر المزيد [+] اقل [-]Aerobic secondary treatment of potato processing wastes
1970
Retention basin control of combined sewer overflows
1970
