خيارات البحث
النتائج 151 - 160 من 212
Phosphorus removal and disposal from municipal wastewater
1971
Connell, Cecil H. (Cecil Hardee)
State-of-art, sugarbeet processing waste treatment
1971
Fischer, James A. | Hungerford, Edward H.
Nitrate removal from wastewaters by ion exchange
1971
Grinstead, Robert R. | Jones, Kenneth C.
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.
اظهر المزيد [+] اقل [-]The impact of oily materials on activated sludge systems
1971
Barnhart, Edwin
Development and demonstration of low-level drift instrumentation
1971
Shofner, Frederick M. | Thomas, Carl O.
Watercraft waste treatment system development and demonstration report
1971
Bryce, Arnold J. | Shelley, Peter S. | White, James C.
A shipboard sewage treatment system consisting of: Comminution of solids for ease of transport and further treatment; Electro coagulation of sewage for ease of removal of suspended solids; Solids separation; Soluble BOD reduction with carbon adsorption; Coliform bacteria removal; and Solids incineration was designed to process shipboard sanitary, culinary, and laundry wastes during prolonged sea trials. Advantages of the electrochemical system are given. Waste stream characterization showed the BOD and suspended solids levels of shipboard wastes to be 2 to 3 times the concentrations common to municipal wastes. The development program was successful in demonstrating a practical and economically viable electro-chemical treatment system.
اظهر المزيد [+] اقل [-]Characterization of taste and odors in water supplies
1971
Collins, Ralph P.
Air pollution aspects of emission sources: municipal incineration
1971
Recovery of floating oil rotating disk type skimmer
1971
