Anaerobic degradation of linear alkylbenzene sulfonate (LAS) in fluidized bed reactor by microbial consortia in different support materials

Autor(es)

de Oliveira, Lorena Lima ^[1] ; Costa, Rachel Biancalana ^[1] ; Okada, Dagoberto Yukio ^[1] ; Vich, Daniele Vital ^[1] ; Silveira Duarte, Iolanda Cristina ^[2] ; Silva, Edson Luiz ^[3] ; Amancio Varesche, Maria Bernadete ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Engn Sao Carlos, Dept Hydraul & Sanitat, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, BR-18052780 Sorocaba, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Chem Engn, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 101, n. 14, p. 5112-5122, JUL 2010.
• Citações Web of Science: 31

Resumo

Four anaerobic fluidized bed reactors filled with activated carbon (R1), expanded clay (R2), glass beads (R3) and sand (R4) were tested for anaerobic degradation of LAS. All reactors were inoculated with sludge from a UASB reactor treating swine wastewater and were fed with a synthetic substrate supplemented with approximately 20 mg l(-1) of LAS, on average. To 560 mg l(-1) COD influent, the maximum COD and LAS removal efficiencies were mean values of 97 +/- 2% and 99 +/- 2%, respectively, to all reactors demonstrating the potential applicability of this reactor configuration for treating LAS. The reactors were kept at 30 degrees C and operated with a hydraulic retention time (HRT) of 18 h. The use of glass beads and sand appear attractive because they favor the development of biofilms capable of supporting LAS degradation. Subsequent 16S rRNA gene sequencing and phylogenetic analysis of samples from reactors R3 and R4 revealed that these reactors gave rise to broad microbial diversity, with microorganisms belonging to the phyla Bacteroidetes, Firmicutes, Actinobacteria and Proteobacteria, indicating the role of microbial consortia in degrading the surfactant LAS. (C) 2010 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 05/58968-4 - Avaliação da degradação de alquibenzeno linear sulfonado (LAS) em reator de leito fluidificado
• Beneficiário: Lorena Oliveira Pires
• Modalidade de apoio: Bolsas no Brasil - Doutorado