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结果 21-30 的 304
Coupled trickling filter-rotating biological contractor nitrification process [Wastewater treatment for prevention of fish toxicity].
1981
Marsh D. | Benefield L. | Bennett E. | Linstedt D. | Hartman R.
Anaerobic activated carbon filter for the treatment of phenol-bearing wastewater [Fish toxicity].
1981
Khan K.A. | Suidan M.T. | Cross W.H.
Viral transport to ground water at a wastewater land application site [Use for irrigation purposes].
1981
Moore B.E. | Sagik B.P. | Sorber C.A.
Computerized biological monitoring for demonstrating wastewater discharge.
1981
Gruber D. | Cairns J. Jr. | Hendricks A.C.
Environmental factors influencing the rate of spread of the grass Deschampsia cespitosa invading areas around the Sudbury nickel-copper smelters [Ontario].
1981
Cox R.M. | Hutchinson T.C.
Stability of activated sludge processes based on statistical measures.
1981
Niku S. | Schroeder E.D.
Sludge treatment/handling, preliminary treatment, and instrumentation top OandM [operation and maintenance] problem list.
1981
Hadeed S.J.
Materials balance in aerated static pile composting [Wastewater sludge processing].
1981
Sikora L.J. | Willson G.B. | Colacicco D. | Parr J.F.
Analytical solutions for transport of conservative and nonconservative contaminants in groundwater systems.
1981
Hoeks J.
Analytic solutions are given for a description of the transport of contaminants in groundwater flow systems. Equations describing the flow of groundwater along streamlines are combined with equations for interaction processes in soil as linear adsorption and first-order biochemical decay. Because dispersion has been neglected rather simple solutions could be derived. The analytic approach given, which includes the main properties of the soil system, proves to be useful for the prediction of groundwater contamination near waste disposal sites, when little quantitative information is available about soil inhomogeneity, dispersion coefficients and complex interaction processes. Therefore it can be a helpful tool for the selection of new sites for waste disposal. In such cases the use of very precise numerical models has little meaning.
显示更多 [+] 显示较少 [-]Deposition of sulphur gases from multiple scattered sources in Alberta [Canada].
1981
Walker D.R. | Dick A.C. | Nyborg M.
Various measurements utilizing soils, plants, precipitation and free water surfaces indicate that approximately 7 to 9 kg/ha of sulphate S was deposited annually within an area of 4600 km('2). This area contained or had adjacent to its boundaries 10 S emission sources for which the provincial government had established a combined allowable daily emission of approximately 330 tonne S. At distance of 40 or more km from the emission sources the annual deposition rate had declined to 4 to 6 kg/ha.
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