Influence of co-substrates in the anaerobic degradation of an anionic surfactant

Autor(es)

Okada, D. Y. ^[1] ; Esteves, A. S. ^[1] ; Delforno, T. P. ^[1] ; Hirasawa, J. S. ^[1] ; Duarte, I. C. S. ^[2] ; Varesche, M. B. A. ^[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

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Chemical Engineering; v. 30, n. 3, p. 499-506, JUL-SEP 2013.
• Citações Web of Science: 4

Resumo

The removal of linear alkylbenzene sulfonate (LAS) was evaluated in a UASB reactor using short-chain alcohols (ethanol and methanol) and complex co-substrate (yeast extract). Using only methanol and ethanol as co-substrates resulted in removal of LAS between 30 and 41%. At the end, addition of a complex substrate (yeast extract) increased the removal of LAS to 50%. During the assay, water supply aeration increased the volatile fatty acid of the effluent (70 mg HAc.L-1) and decreased the removal of LAS (from 40 to 30%). According to the fluorescence in situ hybridization (FISH) results, the amount of Archaea decreased due to water supply aeration (from 64 to 48%). Furthermore, addition of complex co-substrate increased the total anaerobic bacteria and methanogenic archaea content (three and four log units, respectively), which were estimated using the most probable number technique. (AU)

• Processo FAPESP: 09/50427-5 - Degradação de surfactante aniônico em reator UASB com água residuária de lavanderia
• Beneficiário: Dagoberto Yukio Okada
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto