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

Sivaprakasam, Senthilkumar; Surianarayanan, M.; Sekar, Sudharshan; Rajakumar, Susheela

doi:10.1186/1475-2859-7-15

Cited by 119 publications

(58 citation statements)

References 17 publications

(13 reference statements)

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“…Salt tolerant bacteria isolated from tannery wastewater, characterized as Pseudomonas aeruginosa , Bacillus fl exus , Exiguobacterium homiense and Staphylococcus aureus showed 80 % decrease in COD at 8 % salinity in the biological treatment systems (Sivaprakasam et al 2008 ). In addition, a salt tolerant protease from P. aeruginosa isolated from tannery saline effl uent was also used for wastewater treatment.…”

Section: Treatment Of Saline Wastewatersmentioning

confidence: 99%

Halophilic Bacteria: Potentials and Applications in Biotechnology

Mohammadipanah

Hamedi

Dehhaghi

2015

Sustainable Development and Biodiversity

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Halophilic bacteria are categorized based on their requirements to salt. They apply some strategies in adaptation to the high saline environment. Their low nutritional requirements and resistance to high concentrations of salt, introduce as potent agents in wide range of biotechnological applications. Halophilic bacteria are very divergent and more than 150 species introduce in 70 genera of halophilic bacteria are reported. Use of resistant microorganisms and their metabolites under harsh industrially conditions is a strikingly important subject. Various halophilic enzymes in different enzymatically processes, compatible solutes as macromolecule stabilizers, biopolymers, biofertilizers and pharmaceutically active molecules from halophilic bacteria are among the important applications of these group. Additionally, they have many potential in bioremediation of various organic and inorganic pollutants from environment. This chapter covers the different aspects of potential applications of halophilic bacteria in biotechnology. Keywords IntroductionMicrobial life exists in hypersaline habitat refl ects the adaption of microorganisms to high concentration of salts. Halophilic and halotolerant organisms are found in all three domains of life: Archaea , Bacteria , and Eukarya . According to the requirement

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Section: Treatment Of Saline Wastewatersmentioning

confidence: 99%

Halophilic Bacteria: Potentials and Applications in Biotechnology

Mohammadipanah

Hamedi

Dehhaghi

2015

Sustainable Development and Biodiversity

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“…The fact that B. megaterium uyuni S29 is classified as halophilic makes it possible to apply the advantages of haloarchaea related to PHB production, but with the additional benefit of Gram-positives to produce endotoxin-free PHA [11,24]. In addition, several halotolerant Bacillus species have been used in the treatment of wastewater as denitrifiers [25], as phosphate removers [26], and as a biological solution for environmental problems associated with considerable salt concentrations [27]. In this case, the enrichment of the media with competent microorganisms that tolerate higher salt concentrations might constitute a biological and economical solution.…”

Section: Potential Application Of the Findingsmentioning

confidence: 99%

Poly[(R)-3-hydroxybutyrate] production under different salinity conditions by a novel Bacillus megaterium strain

Rodríguez-Contreras

Koller

Braunegg³

et al. 2016

New Biotechnology

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Bacillus megaterium uyuni S29, isolated from the Bolivian salt lake Uyuni, displays a high capability to produce poly[(R)-3-hydroxybutyrate] (PHB) in industrial culture media. In order to analyze the influence of salt on biomass formation and PHB production, cultivations at different NaCl concentrations were carried out according to the salinity conditions of the habitats of the strain´s original isolation. In this preliminary report, the strain showed considerable adaptability to media of different salinity, obtaining the best results for both cellular growth and PHB production in media containing 45 g/L NaCl. The strain grew at 100 g/L NaCl and PHB production was observed even at high salt levels of 250 g/L without unwanted concurrent spore formation. Its tolerance to high salt concentrations together with auspicious PHB productivity makes this strain appealing not only for PHB production, but also for other biotechnological applications such as the treatment of salty wastewater, Additional studies will be needed to further increase PHB productivity.

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“…If proper treatment methods can be developed to reduce the organic load, the salt produced through evaporation could be reused in the skin pickling and other tannery processes. Four strains, Pseudomonas aeruginosa, Bacillus flexus, Exiguobacterium homiense, and Staphylococcus aureus, were isolated from marine and tannery saline wastewater samples and could be used in bioremediation (63). Halophiles have been used in several studies, examining both aerobic and anaerobic treatment of tannery wastewater.…”

Section: Environmental Applicationsmentioning

confidence: 99%

“…Halophiles have been used in several studies, examining both aerobic and anaerobic treatment of tannery wastewater. Different waste removal properties were identified, including the use of an aerobic sequencing batch reactor for removal of phosphate, nitrogen, and organic load at moderate salinity (63).…”

Section: Environmental Applicationsmentioning

confidence: 99%