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Aim of the study The aim of the study was to laboratory determine whether introducing a supportive small coal layer with a granulation of 0.02–5 mm will improve the effectiveness of removal of nitrogen and phosphorus compounds from domestic sewage. The study concerned a layer that improves effectiveness of domestic sewage treatment in a household sewage treatment plant under an infiltration drainage system.

STUDY OF EFFECTIVENESS OF SEWAGE TREATMENT IN MEDIUM SAND WITH A SUPPORTIVE SMALL COAL LAYER