Significance of pre-sedimentation tanks on SBR devices with the second level of treatment

Abstract

Role of primary settling tanks on SBR plants for secondary treatmentThe SBR technology is a modification of the conventional active sludge procedure based on the batch bio-reactor filling principle. The total required volume of the SBR reactor with the second level of treatment can be reduced using a primary settling tank in front of the SBR plant as the first level of treatment, which is especially pronounced for higher-capacity treatment plants preceded by a separate (sanitary) sewerage system. Construction of primary settling tanks before the SBR tanks results in a lower consumption of oxygen compared to SBR plants not equipped with primary settling tanks. Važnost prethodnih taložnica na SBR uređajima s drugim stupnjem pročišćavanja SBR tehnologija predstavlja modifikaciju konvencionalnog postupka s aktivnim muljem na principu šaržnog punjenja bioreaktora. Smanjenje ukupnog potrebnog volumena SBR reaktora s drugim stupnjem pročišćavanja može se ostvariti uz prethodnu taložnicu kao prvi stupanj pročišćavanja ispred SBR reaktora, što je osobito izraženo kod uređaja za pročišćavanje većeg kapaciteta kojima prethodi razdjelni sustav odvodnje. Uz izgradnju prethodnih taložnica ispred SBR reaktora, smanjuje se potrošnja kisika u odnosu na SBR uređaje bez prethodnih taložnica.