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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.)

Influence of volatile fatty acid concentration stability on anaerobic degradation of linear alkylbenzene sulfonate

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Author(s):
Okada, Dagoberto Y. [1] ; Delforno, Tiago P. [1] ; Esteves, Andressa S. [1] ; Polizel, Juliana [1] ; Hirasawa, Julia S. [1] ; Duarte, Iolanda C. S. [2] ; Varesche, Maria B. A. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Escola Engn Sao Carlos, Depto Hidraul & Saneamento, BR-13566590 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, BR-18052780 Sorocaba, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Environmental Management; v. 128, p. 169-172, OCT 15 2013.
Web of Science Citations: 7
Abstract

Linear alkylbenzene sulfonate (LAS) is an anionic surfactant used in cleaning products, which is usually found in wastewaters. Despite the greater LAS removal rate related to a lower concentrations of volatile fatty acids (VFA), the influence of different ranges of VFA on LAS degradation is not known. LAS degradation was evaluated in upflow anaerobic sludge blanket (UASB) and expanded granular sludge bed (EGSB) reactors at different ranges of VFA concentrations. The reactors were fed with a synthetic wastewater containing LAS (14 mg/L). A greater LAS removal rate (40-80%) was related to the lower and narrower range of acetic acid concentration (1-22 mg/L) in the EGSB reactor. In the UASB reactor, the acetic acid concentrations presented a wider range (2-45 mg/L), and some low LAS removal rates (around 20-25%) were observed even at low acetic acid concentrations (<10 mg/L). The high recirculation rate in the EGSB reactor improved substrate-biomass contact, which resulted in a narrower range of VFA and greater LAS removal rate. (C) 2013 Elsevier Ltd. All rights reserved. (AU)