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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 6
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: Bioresource Technology; v. 128, p. 125-133, JAN 2013.
Web of Science Citations: 24
Abstract

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)