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Biodegradation of trace pharmaceutical substances in wastewater by a membrane bioreactor

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Abstract

The biodegradation of selected pharmaceutical micropollutants, including two pharmaceuticals with argued biodegradation, was studied by a lab-scale membrane bioreactor. The reaction kinetics and affecting factors were also investigated in this paper. Clofibric acid (CA) with contradictive biodegradation reported was degraded almost completely at different hydraulic retention times (HRTs) after adaptation to microorganisms. The biodegradation of CA was disturbed at low pH operation, while the activity of microorganisms recovered again after pH adjustment to neutral condition. Ibuprofen (IBP) degraded under neutral and acidic conditions. Removals of IBP and CA were zero-order and first-order reactions under high and low initial concentrations, respectively. Carbamazepine and diclofenac were not degraded regardless of HRTs and pH.

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Authors and Affiliations

  1. School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Longli Bo & Xiaochang Wang

  2. Department of Civil Engineering, Tokyo Institute of Technology, Tokyo, 152-8552, Japan

    Taro Urase

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  1. Longli Bo
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  2. Taro Urase
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  3. Xiaochang Wang
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Correspondence to Longli Bo.

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Bo, L., Urase, T. & Wang, X. Biodegradation of trace pharmaceutical substances in wastewater by a membrane bioreactor. Front. Environ. Sci. Eng. China 3, 236–240 (2009). https://doi.org/10.1007/s11783-009-0004-9

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  • DOI: https://doi.org/10.1007/s11783-009-0004-9

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