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Influence of aeration intensity on mature aerobic granules in sequencing batch reactor

  • Environmental biotechnology
  • Published:
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Abstract

Aeration intensity is well known as an important factor in the formation of aerobic granules. In this research, two identical lab-scale sequencing batch reactors with aeration intensity of 0.8 (R1) and 0.2 m3/h (R2) were operated to investigate the characteristics and kinetics of matured aerobic granules. Results showed that both aeration intensity conditions induced granulation, but they showed different effects on the characteristics of aerobic granules. Compared with the low aeration intensity (R2), the aerobic granules under the higher aeration intensity (R1) had better physical characteristics and settling ability. However, the observed biomass yield (Y obs) in R1 [0.673 kg mixed liquor volatile suspended solids (MLVSS)/kg chemical oxygen demand (COD)] was lower than R2 (0.749 kg MLVSS/kg COD). In addition, the maximum specific COD removal rates (q max) and apparent half rate constant (K) of mature aerobic granular sludge under the two aeration intensities were at a similar level. Therefore, the matured aerobic granule system does not require to be operated in a higher aeration intensity, which will reduce the energy consumption.

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Acknowledgments

This research was supported by National Natural Science Foundation of China (no. 21177033), the Research Fund for the Doctoral Program of Higher Education, Ministry of Education of the People’s Republic of China (20092302110059), and the National High Technology Research and Development Program (2011AA060902).

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Authors and Affiliations

  1. School of Forestry, Northeast Forestry University, Hexing Road 26, Harbin, 150040, Heilongjiang Province, People’s Republic of China

    Da-Wen Gao & Hong Liang

  2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China

    Da-Wen Gao

  3. Key Laboratory of Urban Environment and Health Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China

    Lin Liu

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  1. Da-Wen Gao
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  2. Lin Liu
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Correspondence to Da-Wen Gao.

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Gao, DW., Liu, L. & Liang, H. Influence of aeration intensity on mature aerobic granules in sequencing batch reactor. Appl Microbiol Biotechnol 97, 4213–4219 (2013). https://doi.org/10.1007/s00253-012-4226-6

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  • DOI: https://doi.org/10.1007/s00253-012-4226-6

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