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- W68751091 abstract "Percolation of secondary effluent from oxidation ponds to the groundwater aquifer, which was studied in a large-scale field operation, acted as an efficient advanced wastewater treatment system. The major processes involved were: slow sand filtration, biological degradation, nitrification, denitrification, chemical precipitation, adsorption and ion exchange. Excellent removal was obtained by effluent passage through the soil-aquifer system for several important pollutants, including: phosphorus, particulate organic matter, coliform bacteria, cadmium and chromium. Good removal was also obtained for soluble organics (expressed as DOC or filtered KMnO4 consumption). Complete nitrification and good denitrification were obtained during a period of several years, but then an increase occurred in the nitrogen concentration - in the forms of ammonia and organic nitrogen - which presumably indicates that anaerobic conditions which might become prevailing in the aquifer can impede the completion of the nitrification process. The main dangers of groundwater pollution by seepage of effluents from oxidation ponds appear to be connected with soluble organics and unoxidized nitrogen forms." @default.
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- W68751091 date "1981-01-01" @default.
- W68751091 modified "2023-09-23" @default.
- W68751091 title "TREATMENT EFFECTS AND POLLUTION DANGERS OF SECONDARY EFFLUENT PERCOLATION TO GROUNDWATER" @default.
- W68751091 doi "https://doi.org/10.1016/b978-1-4832-8438-5.50067-4" @default.
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