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结果 71-80 的 213
The river basin model: utility department
1971
Treatment of wastewater from the production of polyhydric organics
1971
Purification of mine water by freezing
1971
Role of animal wastes in agricultural land runoff
1971
Robbins, Jackie W. D. | Howells, David H. | Kriz, George J.
Twelve typical agricultural areas representing three types of animal waste management techniques--lagooning, direct discharge into streams, and land spreading including pasture and drylot units--were studied to determine the amounts of and factors governing stream pollution from swine, dairy, beef, and poultry production operations. More than 1500 stream and lagoon effluent samples were collected with an automatic sampler developed for the study. The samples were analyzed for bacteria, nutrients, and degradable organics. Hydrological and waste management data were also collected. Study results point to the superiority of land spreading for the disposal of animal wastes.
显示更多 [+] 显示较少 [-]An analytical and experimental investigation of surface discharges of heated water
1971
Stolzenbach, Keith D. | Harleman, Donald R. F.
Aerobic digestion of organic waste sludge
1971
Graves, Quintin B.
Mechanisms of biological luxury phosphate uptake
1971
Investigation of response surfaces of the microscreen process
1971
Shea, Timothy G. | Males, Richard M.
Water pollution; disposal and reuse
1971
Zajic, J. E. (James E.)
