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Evaluation of moving-bed biofilm sequencing batch reactor (MBSBR) in operating A2O process with emphasis on biological removal of nutrients existing in wastewater

Abstract

In this study, the performance of moving-bed biofilm sequencing batch reactor in operating the anaerobic/anoxic/oxic (A2O) process for treatment of wastewaters containing nitrogen and phosphorous was evaluated. For this purpose, a pilot system with two bench-scale sequencing batch reactors with a total volume of 30 L and functional volume of 10 L was used. The installation was elaborated using plexiglass, in which 60% of the functional volume consisted of PVC suspended carriers (Kaldnes K3) with a specific surface area of 560 m2/m3. The independent variables used in this study were hydraulic retention time (HRT) (1.5, 2, 2.5, 3, and 3.5 h) and the initial organic load (300, 500, 800, 1000 mg O2/L). The results showed impressive performance in the case of an initial organic load of 300 mg O2/L and HRT of 3 h with maximum removal of COD and TN, respectively, by 95.1 and 89.8%. In the case of an initial organic load of 1000 mg O2/L and HRT of 3.5 h, the maximum total phosphorus removal was 72.3%. Therefore, according to the analysis of data obtained by different HRTs, it was revealed that the system of A2O has greater efficiency in removing organic matter from wastewater in the shortest possible time.

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Acknowledgements

The authors would like to express their full gratitude to all who made contribution to conduction of this study. CHN gratefully acknowledge support from the IBISS and MEMENTO projects provided by Innovation Fund Denmark.

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Correspondence to H. Barzanouni.

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Editorial responsibility: Binbin Huang.

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Seyedsalehi, M., Jaafari, J., Hélix-Nielsen, C. et al. Evaluation of moving-bed biofilm sequencing batch reactor (MBSBR) in operating A2O process with emphasis on biological removal of nutrients existing in wastewater. Int. J. Environ. Sci. Technol. 15, 199–206 (2018). https://doi.org/10.1007/s13762-017-1360-9

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Keywords

  • A2O
  • Biofilm reactor
  • MBSBR
  • Municipal wastewater
  • Nutrients removal