Journal
BIORESOURCE TECHNOLOGY
Volume 167, Issue -, Pages 316-323Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.06.002
Keywords
Geobacter; Dechloromonas; Volatile fatty acids; Surfactant; 16S rRNA
Funding
- CNPq
- FAPESP
- Laboratorio de Processos Biologicos - LPB/EESC/USP
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The aim of this study was to evaluate the removal of linear alkylbenzene sulfonate (LAS) in an anaerobic fluidized bed reactor (AFBR) treating wastewater containing soap powder as LAS source. At Stage I, the AFBR was fed with a synthetic substrate containing yeast extract and ethanol as carbon sources, and without LAS; at Stage II, soap powder was added to this synthetic substrate obtaining an LAS concentration of 14 +/- 3 mg L-1. The compounds of soap powder probably inhibited some groups of microorganisms, increasing the concentration of volatile fatty acids (VFA) from 91 to 143 mg HAc L-1. Consequently, the LAS removal rate was 48 +/- 10% after the 156 days of operation. By sequencing, 16S rRNA clones belonging to the phyla Proteobacteria and Synergistetes were identified in the samples taken at the end of the experiment, with a remarkable presence of Dechloromonas sp. and Geobacter sp. (C) 2014 Elsevier Ltd. All rights reserved.
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