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Thermophilic high-rate anaerobic treatment of wastewater containing long-chain fatty acids: impact of reactor hydrodynamics

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Abstract

The liquid superficial up_ow velocity (Vup) and hydraulic retention time (HRT) on the thermophilic treatment of oleate in expanded granular sludge bed (EGSB) reactors were investigated. The highest methane conversion rate of oleate, 93 mg CH4-COD/g VSS.d, was attained in a reactor operating at a Vup of 1 m/h and an HRT of 24 h. The typical EGSB reactor hydrodynamics (Vup > 4 m/h and HRT < 10 h) inhibited the treatment performance, mainly due to biomass washout in particulate form.

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Authors and Affiliations

  1. Department of Environmental Technology, Wageningen Agricultural University, Bomenweg 2, 6703 HD, Wageningen, The Netherlands

    C.-S. Hwu, G. Molenaar, J. Garthoff, J.B. van Lier & G. Lettinga

Authors
  1. C.-S. Hwu
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  2. G. Molenaar
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  3. J. Garthoff
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  4. J.B. van Lier
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  5. G. Lettinga
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Hwu, CS., Molenaar, G., Garthoff, J. et al. Thermophilic high-rate anaerobic treatment of wastewater containing long-chain fatty acids: impact of reactor hydrodynamics. Biotechnology Letters 19, 447–451 (1997). https://doi.org/10.1023/A:1018344127057

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  • DOI: https://doi.org/10.1023/A:1018344127057

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