The Application of Biofiltration with Polyurethane Foams for Domestic Sewage Treatment

The study presents the results of an experimental method for purification of household sewage on the biofilters filled with polyurethane waste in the form of trims of upholstery foam (PUF). We assessed the removal effectiveness of organic compounds, ammonium nitrogen and total suspended solids from sewage pre-treated in a septic tank at hydraulic loading ranging from 31.8 to 229.2 mm-1. The results of five month study identified the biofilter filled with 30 cm thick foam as the most effectively removing BOD5, CODCr, N-NH4+ and total suspended solids. Average reduction in pollutant levels for this filter reached 95%, 94%, 84% and 68%, respectively. PUR foam in the form of trims of upholstery foam filling the vertical flow filters ensured favorable conditions for the development of heterotrophic and nitrifying bacteria without any need for additional aeration.

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Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).