Biological treatment of tannery wastewater by using salt-tolerant bacterial strains

BACKGROUND: High salinity (1–10% w/v) of tannery wastewater makes it difficult to be treated by conventional biological treatment. Salt tolerant microbes can adapt to these saline conditions and degrade the organics in saline wastewater. RESULTS: Four salt tolerant bacterial strains isolated from ma...

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Autores principales: Sivaprakasam, Senthilkumar, Mahadevan, Surianarayanan, Sekar, Sudharshan, Rajakumar, Susheela
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2397378/
https://www.ncbi.nlm.nih.gov/pubmed/18445252
http://dx.doi.org/10.1186/1475-2859-7-15
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author Sivaprakasam, Senthilkumar
Mahadevan, Surianarayanan
Sekar, Sudharshan
Rajakumar, Susheela
author_facet Sivaprakasam, Senthilkumar
Mahadevan, Surianarayanan
Sekar, Sudharshan
Rajakumar, Susheela
author_sort Sivaprakasam, Senthilkumar
collection PubMed
description BACKGROUND: High salinity (1–10% w/v) of tannery wastewater makes it difficult to be treated by conventional biological treatment. Salt tolerant microbes can adapt to these saline conditions and degrade the organics in saline wastewater. RESULTS: Four salt tolerant bacterial strains isolated from marine and tannery saline wastewater samples were identified as Pseudomonas aeruginosa, Bacillus flexus, Exiguobacterium homiense and Staphylococcus aureus. Growth factors of the identified strains were optimized. Tannery saline wastewater obtained from a Common Effluent Treatment Plant (CETP) near Chennai (southern India) was treated with pure and mixed consortia of four salt tolerant bacterial strains. Experiments with optimized conditions and varying salt content (between 2 and 10% (w/v) were conducted. Salt inhibition effects on COD removal rate were noted. Comparative analysis was made by treating the tannery saline wastewater with activated sludge obtained from CETP and with natural habitat microbes present in raw tannery saline wastewater. CONCLUSION: Salt tolerant bacterial mixed consortia showed appreciable biodegradation at all saline concentrations (2%, 4%, 6%, 8% and 10% w/v) with 80% COD reduction in particular at 8% salinity level the consortia could be used as suitable working cultures for tannery saline wastewater treatment.
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spelling pubmed-23973782008-05-29 Biological treatment of tannery wastewater by using salt-tolerant bacterial strains Sivaprakasam, Senthilkumar Mahadevan, Surianarayanan Sekar, Sudharshan Rajakumar, Susheela Microb Cell Fact Research BACKGROUND: High salinity (1–10% w/v) of tannery wastewater makes it difficult to be treated by conventional biological treatment. Salt tolerant microbes can adapt to these saline conditions and degrade the organics in saline wastewater. RESULTS: Four salt tolerant bacterial strains isolated from marine and tannery saline wastewater samples were identified as Pseudomonas aeruginosa, Bacillus flexus, Exiguobacterium homiense and Staphylococcus aureus. Growth factors of the identified strains were optimized. Tannery saline wastewater obtained from a Common Effluent Treatment Plant (CETP) near Chennai (southern India) was treated with pure and mixed consortia of four salt tolerant bacterial strains. Experiments with optimized conditions and varying salt content (between 2 and 10% (w/v) were conducted. Salt inhibition effects on COD removal rate were noted. Comparative analysis was made by treating the tannery saline wastewater with activated sludge obtained from CETP and with natural habitat microbes present in raw tannery saline wastewater. CONCLUSION: Salt tolerant bacterial mixed consortia showed appreciable biodegradation at all saline concentrations (2%, 4%, 6%, 8% and 10% w/v) with 80% COD reduction in particular at 8% salinity level the consortia could be used as suitable working cultures for tannery saline wastewater treatment. BioMed Central 2008-04-29 /pmc/articles/PMC2397378/ /pubmed/18445252 http://dx.doi.org/10.1186/1475-2859-7-15 Text en Copyright © 2008 Sivaprakasam et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Sivaprakasam, Senthilkumar
Mahadevan, Surianarayanan
Sekar, Sudharshan
Rajakumar, Susheela
Biological treatment of tannery wastewater by using salt-tolerant bacterial strains
title Biological treatment of tannery wastewater by using salt-tolerant bacterial strains
title_full Biological treatment of tannery wastewater by using salt-tolerant bacterial strains
title_fullStr Biological treatment of tannery wastewater by using salt-tolerant bacterial strains
title_full_unstemmed Biological treatment of tannery wastewater by using salt-tolerant bacterial strains
title_short Biological treatment of tannery wastewater by using salt-tolerant bacterial strains
title_sort biological treatment of tannery wastewater by using salt-tolerant bacterial strains
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2397378/
https://www.ncbi.nlm.nih.gov/pubmed/18445252
http://dx.doi.org/10.1186/1475-2859-7-15
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