Clofibric acid and gemfibrozil removal in membrane bioreactors

The removal of two blood lipid regulators, clofibric acid and gemfibrozil, was evaluated using two identical aerobic membrane bioreactors with 6.5 L effective volume each

Tania Gutierrez-Macias; Petia Mijaylova Nacheva

2015

Scholarcy highlights

  • The removal of two blood lipid regulators, clofibric acid and gemfibrozil, was evaluated using two identical aerobic membrane bioreactors with 6.5 L effective volume each
  • Polysulfone ultrafiltration hollow fiber membranes were submerged in the reactors
  • Complete GFZ removal was obtained with F/M of 0.21–0.48 kg COD kgTSS−1 d−1, hydraulic residence time of 4–10 hours, sludge retention time of 10–32 d and MLTSS of 6–10 g L−1
  • The GFZ removal can be attributed to biodegradation and there was no accumulation of the compound in the biomass
  • The CLA removals improved with the SRT and HRT increase and F/M decrease
  • Average removals of 78–79% were obtained with SRT 16–32 d, F/M of 0.21–0.34 kgCOD kgTSS−1 d−1, HRT of 7–10 hours and MLTSS of 6–10 g L−1
  • Biodegradation was found to be the main removal pathway

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