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Effect of magnetic field on the accumulation of polyhydroxyalkanoates (PHAs) by microorganism in activated sludge

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Abstract

The effect of static magnetic field on polyhydroxyalkanoates (PHAs) syntheses by activated sludge under aerobic dynamic feeding (ADF) was evaluated in sequence batch reactors (SBR), with magnetic field intensities of 42, 21, 11 and 7 millitesla (mT) exposure in the feast, feast–famine and famine periods, respectively, and one control group without magnetic field exposure. Under each level of magnetic field intensity, the effect of magnetic field exposed in the famine period to PHAs syntheses was most significant in comparison with that in the feast or feast–famine period. Maximal hydroxybutyrate (HB) and (HV) yield occurred at 21 and 11 mT, respectively, and the minimal yield occurred at 42 mT during exposure in the famine period. The maximum biodegradable rate constant of PHA was noted at 11 mT during exposure in the famine period.

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Acknowledgments

The authors are grateful to National Science and Technology Special of Water Pollution Control (No.2008ZX07101-006) and the Science and Technology Department of Zhejiang Province for the financial support provided for this work (No.2008C23100).

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Authors and Affiliations

  1. Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310027, China

    Sai-Chang Zhu, Zhen-Lan Xu, Hui-Juan Meng, Jun Zhou & Hong Chen

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  1. Sai-Chang Zhu
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  2. Zhen-Lan Xu
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  3. Hui-Juan Meng
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  4. Jun Zhou
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  5. Hong Chen
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Correspondence to Hong Chen.

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Zhu, SC., Xu, ZL., Meng, HJ. et al. Effect of magnetic field on the accumulation of polyhydroxyalkanoates (PHAs) by microorganism in activated sludge. Bioprocess Biosyst Eng 35, 985–991 (2012). https://doi.org/10.1007/s00449-012-0683-7

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  • DOI: https://doi.org/10.1007/s00449-012-0683-7

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