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Inactivation of ova of the parasites Taenia saginata and Ascaris suum during heated anaerobic digestion
1983
Pike, E.B. | Morris, D.L. | Carrington, E.G.
Taenia saginata, Ascaris suum, current research on inactivation of ova in sewage sludge by means of heated anaerobic digestion: United Kingdom
显示更多 [+] 显示较少 [-]The destruction of pathogens and parasites in sewage sludge by chemical means
1983
Godfree, A.F. | Bevins, R. | Jones, F.
Taenia saginata and other pathogens likely to cause problems resulting from agricultural use of sewage sludge, laboratory and field trials testing efficacy of DF 955 (formalin based compound) as a means of chemical destruction
显示更多 [+] 显示较少 [-]Water pollution and management
1983
Varshney, C. K.
"Collection of essays based on lectures delivered during a course on "Aquatic Ecology" organised by C.K. Varshney at the School of Environmental Sciences, Jawaharlal Nehru University, New Delhi ..."--Foreword.
显示更多 [+] 显示较少 [-]Transport of ammonium- and nitrate-nitrogen in surface runoff from pasture as influenced by urea application
1983
Sharpley, A.N. | Syers, J.K. | Tillman, R.W.
The effect of a surface application of urea on the transport of N in surface runoff from permanent pasture in New Zealand was investigated under natural rainfall conditions. Maximum concentrations of NH4- N(3.6 mg l-1) and NO3-N(4.5 mg l-1) in surface runoff were attained 3 and 1 week, respectively, following urea application (60 kg N ha-1). Amounts of NH4-N, NO3-N, and total N transported in surface runoff from unfertilized (1.58, 0.52, and 4.73 kg ha-1 yr-1, respectively) and fertilized pasture (1.74, 1.09, and 8.96 kg ha-1 yr-1)were less than inputs in precipitation (2.09, 3.63, and 10.9 kg ha-1 yr-1), respectively. Amounts of NH4-N, NO3-N, and total N transported in surface runoff were only 0.3, 1.0, and 7.1 % of that applied. The mean annual concentration of NH4-N (0.9 mg l-1) in surface runoff from unfertilized pasture was above the recommended levels for drinking water (0.5 mg l-1) and the mean concentration of NO3-N (0.5 mg l-1) was greater than levels associated with accelerated cutrophication (0.3 mg l-1 ). The practicality of attaining or maintaining N concentrations in surface runoff from fertilized agricultural land below recommended levels is questioned.
显示更多 [+] 显示较少 [-]Toxic chemical pollution in Puget Sound
1983
Arterial pollution
1983
Peeters, H. (Hubert) | Gresham, G. A (Geoffrey Austin) | Paoletti, Rodolfo
Indoor air pollution
1983
Wadden, Richard A. | Scheff, Peter A.
Nonpoint source pollution abatement in the Great Lakes Basin | Pollution abatement in the Great Lakes Basin
1983
Interface of forest and agriculture in nonpoint pollution control
1983
Fowler, John M. | Heady, Earl O. (Earl Orel) | Christensen, Douglas A.