Phenolic wastewater treatment in a three‐phase fluidised bed bioreactor containing low density particles

This work is focused on the evaluation of a beta-cyclodextrin polymer as a carrier medium in a fluidized bed bioreactor treating aqueous phenol as a model pollutant. The insoluble polymer support was obtained in the shape of spherical beads by crosslinking beta-cyclodextrin with epichlorohydrin. A batch of swollen polymer particles was loaded into the reactor and inoculated with a mixed bacterial culture. Bacterial growth on the polymer beads was initially stimulated by glucose addition to the medium, and then gradually replaced with phenol. The operational variables studied after the acclimation period included phenol load, hydraulic residence time and recirculation flow rate. Low hydraulic residence times and moderate phenol loads were applied. The elimination capacity was usually about 1.0 kg-phenol/m(3)d, although a maximum of 2.8 kg-phenol/m(3)d was achieved with a retention time of only 0.55 h. The depuration efficiency was not affected by the recirculation flow rate in the range studied. Neither operational nor support stability problems were detected during the operation. A high degree of expansion was achieved in the bioreactor due to the hydrogel nature of the cyclodextrin polymer and, consequently, a low energy requirement was necessary to fluidize the bed.

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Biological wastewater treatment in the inverse fluidised bed reactor

Sokól̵¹,

Ambaw²,

Woldeyes³

2009

Chemical Engineering Journal

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Phenolic wastewater treatment in a three‐phase fluidised bed bioreactor containing low density particles

Cited by 6 publications

References 13 publications

Kinetics of atrazine biodegradation by suspended and immobilized mixed microbial cells cultivated in continuous systems

Kinetics of atrazine biodegradation by suspended and immobilized mixed microbial cells cultivated in continuous systems

Feasibility study of degradation of phenol in a fluidized bed bioreactor with a cyclodextrin polymer as biofilm carrier

Biological wastewater treatment in the inverse fluidised bed reactor

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