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Biological nutrient removal in sequencing batch reactor with different number of steps

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Abstract

Nutrient removal from synthetic wastewater was carried out by using a lab-scale sequencing batch reactor. Three different operations consisting of different numbers of steps were tested and their performances were compared. These operations were the three-step operation consisting of anaerobic(An)/anoxic(Ax)/oxic(Ox) steps; the four-step (An/Ox/Ax/Ox), and the five-step (An/Ax/Ox/Ax/Ox) operations. Effects of number of operating stages and the total cycle time on COD, nitrogen (NH4-N, NO3-N) and phosphate (PO4-P) removal from synthetic wastewater were investigated. Experiments were carried out with a constant sludge age of 10 days. The highest nutrient removals were realized by using the five-step operation with percent COD, NH4-N, NO3-N and PO4-P removals of 94%, 90%, 64% and 57%, respectively. Removal efficiencies of COD and NH4-N in three- and four-step operations were slightly higher than those of the five-step operation However,NO3-N and PO4-P removal efficiencies obtained by the five-step operation were clearly higher than those for the other operations. Therefore, the five-step operation with 10.5 h overall cycle time was selected as the most appropriate one for effective nutrient removal.

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Acknowledgement

This study was supported by the research funds of Uludag University, Bursa and Dokuz Eylul University, Izmir, Turkey.

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Correspondence to Fikret Kargı.

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Kargı, F., Uygur, A. Biological nutrient removal in sequencing batch reactor with different number of steps. Clean Techn Environ Policy 6, 61–65 (2003). https://doi.org/10.1007/s10098-003-0190-2

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  • DOI: https://doi.org/10.1007/s10098-003-0190-2

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