Biodegradation of the Anionic Surfactant Linear Alkylbenzene Sulfonate (LAS) by Autochthonous Pseudomonas sp.

Asok, Aju K.; Jisha, M. S.

doi:10.1007/s11270-012-1256-8

Cited by 48 publications

(10 citation statements)

References 27 publications

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“…A. hydrophila strain S7, P. stutzeri strain S8, and P. nitroreducens strain S11 were isolated from the enrichments and are capable of SLES cleavage and degradation under denitrifying conditions (Table 2 ). Although bacteria from the Aeromonas and Pseudomonas genera are known to be involved in aerobic degradation of anionic surfactants (Asok and Jisha 2012 ; Chaturvedi and Kumar 2011 ; Jimenez et al 1991 ; Sacco et al 2006 ), the ability of A. hydrophila , P. stutzeri , and P. nitroreducens to use SLES as sole carbon and energy source coupled to nitrate or oxygen reduction was never shown before. In this work we verified that A. hydrophila (DSM 30187 T ) and P. stutzeri (CCUG 11256 T ) type strains cannot degrade SLES with nitrate as electron acceptor, which shows that SLES degradation might be a specific physiological ability of isolates S7 and S8.…”

Section: Discussionmentioning

confidence: 99%

Sodium lauryl ether sulfate (SLES) degradation by nitrate-reducing bacteria

Paulo

Aydın

Dimitrov

et al. 2017

Appl Microbiol Biotechnol

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The surfactant sodium lauryl ether sulfate (SLES) is widely used in the composition of detergents and frequently ends up in wastewater treatment plants (WWTPs). While aerobic SLES degradation is well studied, little is known about the fate of this compound in anoxic environments, such as denitrification tanks of WWTPs, nor about the bacteria involved in the anoxic biodegradation. Here, we used SLES as sole carbon and energy source, at concentrations ranging from 50 to 1000 mg L−1, to enrich and isolate nitrate-reducing bacteria from activated sludge of a WWTP with the anaerobic-anoxic-oxic (A2/O) concept. In the 50 mg L−1 enrichment, Comamonas (50%), Pseudomonas (24%), and Alicycliphilus (12%) were present at higher relative abundance, while Pseudomonas (53%) became dominant in the 1000 mg L−1 enrichment. Aeromonas hydrophila strain S7, Pseudomonas stutzeri strain S8, and Pseudomonas nitroreducens strain S11 were isolated from the enriched cultures. Under denitrifying conditions, strains S8 and S11 degraded 500 mg L−1 SLES in less than 1 day, while strain S7 required more than 6 days. Strains S8 and S11 also showed a remarkable resistance to SLES, being able to grow and reduce nitrate with SLES concentrations up to 40 g L−1. Strain S11 turned out to be the best anoxic SLES degrader, degrading up to 41% of 500 mg L−1. The comparison between SLES anoxic and oxic degradation by strain S11 revealed differences in SLES cleavage, degradation, and sulfate accumulation; both ester and ether cleavage were probably employed in SLES anoxic degradation by strain S11.Electronic supplementary materialThe online version of this article (doi:10.1007/s00253-017-8212-x) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Sodium lauryl ether sulfate (SLES) degradation by nitrate-reducing bacteria

Paulo

Aydın

Dimitrov

et al. 2017

Appl Microbiol Biotechnol

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“…PDA plates were spot inoculated and incubated at 30 ∘ C for 10 days. Radial growth in centimetre (cm) was measured and results were recorded in lab book [11][12][13].…”

Section: Characterization Of Mamccmentioning

confidence: 99%

Enhancing Growth of Vigna radiata in the Presence of Pseudomonas aeruginosa Biopolymer and Metarhizium anisopliae Spores

Rekadwad¹,

Khobragade²,

Jadhav³

et al. 2016

Advances in Agriculture

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Exopolysaccharide producing Pseudomonas aeruginosa NCIM 2945 (PANCL) belonging to gamma-proteobacterium and entomopathogenic fungus Metarhizium anisopliae MCC 1129 (MAMCC) belonging to Ascomycota were studied for their morphological features biochemical characteristics and plant growth promotion ability. Optimum growth of PANCL was recorded after 24 h at temperature 30°C and pH 7.0. Gram-negative PANCL appeared as white in color, one mm size, circular, opaque, and nonconsistent elevated colonies with entire margin. It has utilized dextrose, fructose, maltose, and sorbitol as carbon source and produced acid in the medium. PANCL was sensitive to Polymyxin B (300 µgm/disc) followed by Neomycin (30 µgm/disc), Gentamycin (10 µgm/disc), and Chloramphenicol (30 µgm/disc). PANCL has secreted extracellular lipase, amylase, protease, and exopolysaccharides (EPS). Another fungal strain MAMCC sporulated after 168 h at temperature 30°C and pH 7.0. MAMCC has septate-white mycelium and bears dirty green colored spores. Growth of MAMCC was enhanced in the presence of Neem and Karela-Amla oil (0.1 mL each). Extracellular polysaccharide produced by PANCL and spores of MAMCC promoted growth of dicotyledon Vigna radiata (Mung) individually as well as in consortium. Considerable increase in dry weight of Vigna radiata was recorded. Thus, reported PANCL and MAMCC strains have promoted growth Vigna radiata and may be a solution for sustainable agriculture.

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“…Moreover, there are relatively few studies devoted to the degradation process per se and its intermediate products; some researchers have suggested probable intermediate products but without sufficient evidence to prove their conjecture due to inherent limits of the analytical methods used. 24,[30][31][32] Therefore, establishing an accurate detection method of the intermediate products of DBS and using it to investigate the biodegradation process of DBS is essential.…”

Section: Introductionmentioning

confidence: 99%