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Scale-down studies of membrane bioreactor degrading anionic surfactants wastewater: Isolation of new anionic-surfactant degrading bacteria.

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Title: Scale-down studies of membrane bioreactor degrading anionic surfactants wastewater: Isolation of new anionic-surfactant degrading bacteria.
Authors: Karray, Fatma1 fatma.karray@cbs.rnrt.tn, Mezghani, Maha1, Mhiri, Najla1, Djelassi, Brahim1, Sayadi, Sami1
Source: International Biodeterioration & Biodegradation. Oct2016, Vol. 114, p14-23. 10p.
Subjects: Wastewater treatment, Anionic surfactants, Membrane reactors, Citrobacter, Aerobic bacteria, Chemical oxygen demand
Abstract: Sodium lauryl ether sulfate (SLES) is an anionic surfactant used in the formulation of several detergent products. The high concentration of organic materials and SLES present in the industrial wastewater poses a real problem. In the previous study, Dhouib et al. (Dhouib et al., 2003) showed that Citrobacter braakii has a large capacity to degrade anionic surfactants in the wastewater treatment of a cosmetics industry. The scale-down has made possible to isolate, from the aerobic membrane bioreactor (MBR) inoculated with Citrobacter braakii since after one year, four strains A4, A10, A13 and A14 which were identified as Pseudomonas aeruginosa , Pseudomonas stutzeri , Bacillus safensis and Staphylococcus arlettae , respectively. These isolates are able to degrade 100% of SLES at a concentration of 1000 mg l −1 in the BSM medium. Physical-chemical parameters have been followed during 104 days in the influent, bioreactor and effluent. Biomass concentration increased slightly in the reactor and reached 13 g VSS l −1 . The COD and surfactants average removals were about 92% and 99.6%, respectively. [ABSTRACT FROM AUTHOR]
Copyright of International Biodeterioration & Biodegradation is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Scale-down studies of membrane bioreactor degrading anionic surfactants wastewater: Isolation of new anionic-surfactant degrading bacteria.
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  Data: <searchLink fieldCode="AR" term="%22Karray%2C+Fatma%22">Karray, Fatma</searchLink><relatesTo>1</relatesTo><i> fatma.karray@cbs.rnrt.tn</i><br /><searchLink fieldCode="AR" term="%22Mezghani%2C+Maha%22">Mezghani, Maha</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mhiri%2C+Najla%22">Mhiri, Najla</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Djelassi%2C+Brahim%22">Djelassi, Brahim</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sayadi%2C+Sami%22">Sayadi, Sami</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22International+Biodeterioration+%26+Biodegradation%22">International Biodeterioration & Biodegradation</searchLink>. Oct2016, Vol. 114, p14-23. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Wastewater+treatment%22">Wastewater treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Anionic+surfactants%22">Anionic surfactants</searchLink><br /><searchLink fieldCode="DE" term="%22Membrane+reactors%22">Membrane reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Citrobacter%22">Citrobacter</searchLink><br /><searchLink fieldCode="DE" term="%22Aerobic+bacteria%22">Aerobic bacteria</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+oxygen+demand%22">Chemical oxygen demand</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Sodium lauryl ether sulfate (SLES) is an anionic surfactant used in the formulation of several detergent products. The high concentration of organic materials and SLES present in the industrial wastewater poses a real problem. In the previous study, Dhouib et al. (Dhouib et al., 2003) showed that Citrobacter braakii has a large capacity to degrade anionic surfactants in the wastewater treatment of a cosmetics industry. The scale-down has made possible to isolate, from the aerobic membrane bioreactor (MBR) inoculated with Citrobacter braakii since after one year, four strains A4, A10, A13 and A14 which were identified as Pseudomonas aeruginosa , Pseudomonas stutzeri , Bacillus safensis and Staphylococcus arlettae , respectively. These isolates are able to degrade 100% of SLES at a concentration of 1000 mg l −1 in the BSM medium. Physical-chemical parameters have been followed during 104 days in the influent, bioreactor and effluent. Biomass concentration increased slightly in the reactor and reached 13 g VSS l −1 . The COD and surfactants average removals were about 92% and 99.6%, respectively. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of International Biodeterioration & Biodegradation is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.ibiod.2016.05.020
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        Text: English
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      – SubjectFull: Wastewater treatment
        Type: general
      – SubjectFull: Anionic surfactants
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      – SubjectFull: Membrane reactors
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      – TitleFull: Scale-down studies of membrane bioreactor degrading anionic surfactants wastewater: Isolation of new anionic-surfactant degrading bacteria.
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              Text: Oct2016
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