Optimization of linear alkylbenzene sulfonate (LAS) degradation in UASB reactors by varying bioavailability of LAS, hydraulic retention time and specific organic load rate

Autor(es)

Okada, Dagoberto Y. ^[1] ; Delforno, Tiago P. ^[1] ; Esteves, Andressa S. ^[1] ; Sakamoto, Isabel K. ^[1] ; Duarte, Iolanda C. S. ^[2] ; Varesche, Maria B. A. ^[1]

Afiliação do(s) autor(es)

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

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

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 128, p. 125-133, JAN 2013.
• Citações Web of Science: 24

Resumo

Degradation of linear alkylbenzene sulfonate (LAS) in UASB reactors was optimized by varying the bioavailability of LAS based on the concentration of biomass in the system (1.3-16 g TS/L), the hydraulic retention time (HRT), which was operated at 6, 35 or 80 h, and the concentration of co-substrates as specific organic loading rates (SOLR) ranging from 0.03-0.18 g COD/g TVS.d. The highest degradation rate of LAS (76%) was related to the lowest SOLR (0.03 g COD/g TVS.d). Variation of the HRT between 6 and 80 h resulted in degradation rates of LAS ranging from 18% to 55%. Variation in the bioavailability of LAS resulted in discrete changes in the degradation rates (ranging from 37-53%). According to the DGGE profiles, the archaeal communities exhibited greater changes than the bacterial communities, especially in biomass samples that were obtained from the phase separator. The parameters that exhibited more influence on LAS degradation were the SOLR followed by the HRT. (C) 2012 Elsevier Ltd. All rights reserved. (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