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Methanogenic activity inhibition by increasing the linear alkylbenzene sulfonate (LAS) concentration.
Souza, Luiza F C; Florencio, Lourdinha; Gavazza, Savia; Kato, Mario T.
Afiliação
  • Souza LF; a Laboratory of Environmental Sanitation, Department of Civil Engineering, Federal University of Pernambuco , Recife , Brazil.
  • Florencio L; a Laboratory of Environmental Sanitation, Department of Civil Engineering, Federal University of Pernambuco , Recife , Brazil.
  • Gavazza S; a Laboratory of Environmental Sanitation, Department of Civil Engineering, Federal University of Pernambuco , Recife , Brazil.
  • Kato MT; a Laboratory of Environmental Sanitation, Department of Civil Engineering, Federal University of Pernambuco , Recife , Brazil.
J Environ Sci Health A Tox Hazard Subst Environ Eng ; 51(8): 656-60, 2016 Jul 02.
Article em En | MEDLINE | ID: mdl-27088975
The effect of the initial concentration of linear alkylbenzene sulfonate (LAS) on specific methanogenic activity (SMA) was investigated in this work. Six anaerobic flasks reactors with 1 L of total volume were inoculated with anaerobic sludge (2 g VSS L(-1)). The reactors were assayed for 42 days, and fed with volatile fatty acids, nutrients, and LAS. The initial LAS concentrations were 0, 10, 30, 50, 75, and 100 mg L(-1) for the treatment flasks T1 (control), T2, T3, T4, T5, and T6, respectively. When compared with T1, T2 exhibited a 30% reduction in maximum SMA and total methane production (TMP). In treatment T3 through T6, the reductions were 44-97% (T3-T6) for SMA, and 30-90% (T3-T6) for TMP. Total LAS removal increased following the increase in the initial LAS concentration (from 36% at T1 to 76% at T6), primarily due to the high degree of sludge adsorption. LAS biodegradation also occurred (32% in all treatments), although this was most likely associated with the formation of non-methane intermediates. Greater removal by adsorption was observed in long-chain homologues, when compared to short-chain homologues (C13 > C10), whereas the opposite occurred for biodegradation (C10 > C13). The C13 homologue was adsorbed to a great extent (in mass) in T4, T5 and T6, and may also have inhibited methane formation in these treatments.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Esgotos / Tensoativos / Methylococcaceae / Ácidos Alcanossulfônicos / Purificação da Água / Reatores Biológicos / Águas Residuárias Limite: Humans Idioma: En Revista: J Environ Sci Health A Tox Hazard Subst Environ Eng Assunto da revista: TOXICOLOGIA Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Esgotos / Tensoativos / Methylococcaceae / Ácidos Alcanossulfônicos / Purificação da Água / Reatores Biológicos / Águas Residuárias Limite: Humans Idioma: En Revista: J Environ Sci Health A Tox Hazard Subst Environ Eng Assunto da revista: TOXICOLOGIA Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido