A mixture of Industrial wastewater from chemical industry (varnish, paint and pigments production) and municipal wastewater was treated in pilot sequencing batch reactor (SBR). Results of the pilot experiments show that the foaming problem has great influence on the behavior of SBR, especially when the ratio between industrial and municipal wastewater is very high.
Foaming problem was negligible when the mixture with φ; 20 % of the industrial wastewater and j = 80 % of the municipal wastewater was treated.
With the operational cycle of 6 h with anoxic (non-aerated) and aerobic (aerated) phase the required effluent quality was obtained according to regulations for treated wastewater that flows into the recipient. Operational cycle (aerobic phase) can be 60 min shorter at minimal organic and nitrogen loading.Smjesa industrijskih otpadnih vodâ (proizvodnja lakova, boja i pigmenata) i komunalnih otpadnih voda obrađivana je u pilotnom slijednom šaržnom reaktoru (SBR). Rezultati eksperimenata pokazuju da pjenjenje znaeajno utjeee na rad SBR-a, posebice u uvjetima velikih omjera industrijskih i komunalnih otpadnih voda na ulazu u reaktor. Problem pjenjenja je beznaeajan kada se obrađuje mješavina j = 20 % industrijskih otpadnih voda i j = 80 % komunalnih otpadnih voda. S operacijskim ciklusom od 6 sati s anoksienom (faza bez aeriranja) i aerobnom (aeriranom) fazom postiže se željena kvaliteta efluenta za obrađenu otpadnu vodu koja odlazi u recipijent.
Operacijski ciklus (aerobna faza) može biti i 60 min kraća ako je sadržaj organskih tvari i dušika pri punjenju reaktora minimalan
