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

M. Seyedsalehi, J. Jaafari, Claus Hélix-Nielsen, G. Hodaifa, M. Manshouri, S. Ghadimi, H. Hafizi, H. Barzanouni*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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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.
Original languageEnglish
JournalInternational Journal of Environmental Science and Technology
Volume15
Issue number1
Pages (from-to)199-206
Number of pages8
ISSN1735-1472
DOIs
Publication statusPublished - 2018

Keywords

  • Environment
  • Environment, general
  • Environmental Science and Engineering
  • Environmental Chemistry
  • Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
  • Soil Science & Conservation
  • Ecotoxicology
  • SC7
  • A2O
  • Biofilm reactor
  • MBSBR
  • Municipal wastewater
  • Nutrients removal

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