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Effective Treatment of Tannery Effluent by Biofilm-Forming Bacteria and Evaluation of their Toxicity Reduction.

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Title: Effective Treatment of Tannery Effluent by Biofilm-Forming Bacteria and Evaluation of their Toxicity Reduction.
Authors: Maurya, Annapurna1,2 (AUTHOR) maurya.annu1990@gmail.com, Kumar, Rajesh1,2 (AUTHOR) rkrajeshkumar665@gmail.com, Raj, Abhay1,2 (AUTHOR) araj@iitr.res.in
Source: Water, Air & Soil Pollution. Feb2025, Vol. 236 Issue 2, p1-22. 22p.
Subject Terms: *Mixed culture (Microbiology), *Moving bed reactors, *Onions, *Toxicity testing, *Enterococcus faecium
Abstract: This study investigates the treatment efficiency of biofilm immobilized MBBR (moving bed biofilm reactor) system for tannery effluent compared to suspended cells system. A mixed culture of biofilm-forming strains Bacillus vallismortis, Bacillus haynesii, Alcaligenes aquatilis, and Enterococcus faecium showed increased biofilm formation and Cr(VI) reduction compared to individual strains. The MBBR carriers were shown to have a greater biofilm formation (cell viability = 8.255 log units) and EPS yield (58 mg/g total solids) compared to the PUF (polyurethane foam) carriers (cell viability = 6.806 log units, and EPS yield = 36.4 mg/g total solids). The COD removal efficiency of the biofilm immobilized MBBR was higher (82.5%) compared to suspended cells treatment (61.3%) in the fed-batch treatment method. GC–MS analysis showed that 2,6-Bis(tert-butyl) phenol and 1-monopalmitin compounds were either diminished or transformed during treatment with biofilm immobilized MBBR. Furthermore, phytotoxicity and genotoxicity tests confirmed the lower toxicity of biofilm stabilized MBBR treated effluent compared to treated suspended cells on fenugreek plant and Allium cepa L. roots, respectively. The study indicates that treating tannery effluent with a mixed culture of B. vallismortis, B. haynesii, A. aquatilis, and E. faecium immobilized on MBBR effectively removes both organic and inorganic contaminants along with genotoxic effects. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 183077267
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PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Effective Treatment of Tannery Effluent by Biofilm-Forming Bacteria and Evaluation of their Toxicity Reduction.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Maurya%2C+Annapurna%22">Maurya, Annapurna</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> maurya.annu1990@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Kumar%2C+Rajesh%22">Kumar, Rajesh</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> rkrajeshkumar665@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Raj%2C+Abhay%22">Raj, Abhay</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> araj@iitr.res.in</i>
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  Label: Source
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  Data: <searchLink fieldCode="JN" term="%22Water%2C+Air+%26+Soil+Pollution%22">Water, Air & Soil Pollution</searchLink>. Feb2025, Vol. 236 Issue 2, p1-22. 22p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Mixed+culture+%28Microbiology%29%22">Mixed culture (Microbiology)</searchLink><br />*<searchLink fieldCode="DE" term="%22Moving+bed+reactors%22">Moving bed reactors</searchLink><br />*<searchLink fieldCode="DE" term="%22Onions%22">Onions</searchLink><br />*<searchLink fieldCode="DE" term="%22Toxicity+testing%22">Toxicity testing</searchLink><br />*<searchLink fieldCode="DE" term="%22Enterococcus+faecium%22">Enterococcus faecium</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study investigates the treatment efficiency of biofilm immobilized MBBR (moving bed biofilm reactor) system for tannery effluent compared to suspended cells system. A mixed culture of biofilm-forming strains Bacillus vallismortis, Bacillus haynesii, Alcaligenes aquatilis, and Enterococcus faecium showed increased biofilm formation and Cr(VI) reduction compared to individual strains. The MBBR carriers were shown to have a greater biofilm formation (cell viability = 8.255 log units) and EPS yield (58 mg/g total solids) compared to the PUF (polyurethane foam) carriers (cell viability = 6.806 log units, and EPS yield = 36.4 mg/g total solids). The COD removal efficiency of the biofilm immobilized MBBR was higher (82.5%) compared to suspended cells treatment (61.3%) in the fed-batch treatment method. GC–MS analysis showed that 2,6-Bis(tert-butyl) phenol and 1-monopalmitin compounds were either diminished or transformed during treatment with biofilm immobilized MBBR. Furthermore, phytotoxicity and genotoxicity tests confirmed the lower toxicity of biofilm stabilized MBBR treated effluent compared to treated suspended cells on fenugreek plant and Allium cepa L. roots, respectively. The study indicates that treating tannery effluent with a mixed culture of B. vallismortis, B. haynesii, A. aquatilis, and E. faecium immobilized on MBBR effectively removes both organic and inorganic contaminants along with genotoxic effects. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s11270-024-07714-0
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 22
        StartPage: 1
    Subjects:
      – SubjectFull: Mixed culture (Microbiology)
        Type: general
      – SubjectFull: Moving bed reactors
        Type: general
      – SubjectFull: Onions
        Type: general
      – SubjectFull: Toxicity testing
        Type: general
      – SubjectFull: Enterococcus faecium
        Type: general
    Titles:
      – TitleFull: Effective Treatment of Tannery Effluent by Biofilm-Forming Bacteria and Evaluation of their Toxicity Reduction.
        Type: main
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            NameFull: Maurya, Annapurna
      – PersonEntity:
          Name:
            NameFull: Kumar, Rajesh
      – PersonEntity:
          Name:
            NameFull: Raj, Abhay
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          Dates:
            – D: 01
              M: 02
              Text: Feb2025
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-print
              Value: 00496979
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              Value: 236
            – Type: issue
              Value: 2
          Titles:
            – TitleFull: Water, Air & Soil Pollution
              Type: main
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