Abatement of 4-Chlorophenol in Aqueous Phase by Ozonation Coupled with a Sequencing Batch Biofilm Reactor (SBBR)

Authors: Dantas, Renato; Contreras, Sandra; Sans, Carme; Esplugas, Santiago

Source: Ozone: Science and Engineering, Volume 30, Number 6, November 2008 , pp. 447-455(9)

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Abstract:

The aim of this work was to assess the mineralization of 100 and 200 mg L-1 4-chlorophenol (4-CP) solutions by ozonation-biological treatment. The results show that starting from a 4-CP initial concentration from 100 to 500 mg L-1 and using an ozone flow rate of 5.44 and 7.57 g h-1, 4-CP was completely removed. A kinetic constant around 9·10-2 min-1 was calculated for the ozone direct attack. The biodegradability (BOD5/COD) of the pre-ozonated solutions increased from 0 until a range between 0.2-0.37. The combination of the ozonation and aerobic biological treatment in an aerobic sequencing batch biofilm reactor (SBBR) gave an abatement of more than 90% of the initial TOC.

Keywords: Ozone; TOC Removal; Biodegradability; Aerobic Biological Treatment; 4-Chlorophenol; SBBR

Document Type: Research article

DOI: http://dx.doi.org/10.1080/01919510802488037

Affiliations: 1: Chemical Engineering Department, University of Barcelona, Barcelona, Spain

Publication date: 2008-11-01