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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Mar 2019, 40 (2)                                                                                                             Back



nstantaneous and historical temperature effects on a-pinene

Effectiveness of application of lignolytic fungal strains, Cladosporium uredinicola GRDBF21 and Bipolaris maydis GRDBF23 in the treatment of tannery effluent

 

Paper received: 02.11.2017                    Revised received: 26.02.2018                            Re-revised received: 07.05.2018                  Accepted: 10.07.2018

 

 

Authors Info

J.T. Joseph1, R. Mahalakshmi1a,

K. Revathy1, K. Panneerselvam2, P. Manikandan3,4 and

C.S. Shobana5*   

  

1Department of Microbiology,Dr. G.R. Damodaran College of Science, Coimbatore – 641 014, India

1aDepartment of Biotechnology, Dr. G.R. Damodaran College of Science, Coimbatore – 641 014, India

2Department of Microbiology, MR. Government Arts College, Mannargudi – 614 014, India

3Aravind Eye Hospital and Postgraduate Institute of Ophthalmology, Coimbatore, Tamilnadu– 641 014, India

4Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Kingdom of Saudi Arabia - 11952

5Department of Microbiology, PSG College of Arts & Science,                  Coimbatore – 641 014, India

 

    

 

*Corresponding Author Email :

shobanasenthilkumar@gmail.com

 

 

 

Abstract

Aim: This study aims to investigate the ability of laccase producing fungal strains Cladosporium uredinicola GRDBF21 and Bipolaris maydis GRDBF23 isolated from decaying wood bark in decolouration and detoxification of tannery effluent.     

 

Methodology: Fungal strains from decaying wood bark samples were isolated by serial dilution technique followed by single spore isolation method. The selected fungal isolates were investigated for their laccase enzyme production. Their effect on physio-chemical properties of tannery effluent collected from final effluent drainage of a leather-tanning factory in Chrompet, Chennai, Tamil Nadu, India was analysed. Toxicity of treated and untreated tannery effluent was analysed by seed germination test.

 

Results: The lignolytic and constitutive producers of laccase enzyme, C. uredinicola GRDBF21 and B. maydis GRDBF23 exhibited a tolerance index of 1.2 and 1.5, respectively, at 60% effluent concentration. The isolates were able to increase pH and reduce colour, turbidity, total suspended solids and electrical conductivity of the effluent. Besides observing a decrease in the BOD and COD levels, there was also a reduction in the sodium and hexavalent chromium content. C. uredinicola GRDBF21 and B. maydis GRDBF23 treated effluent showed a seed germination percentage of 66.6% and 76.6%, respectively. The untreated effluent completely inhibited the seed germination.  

 

Interpretation: The study confirms that the fungal species C. uredinicola GRDBF21 and B. maydis GRDBF23 could be effectively used in decolouration and detoxification of tannery effluent.

 

Key words: Ascomycetes fungi, Bioremediation, Laccase, Lignolytic enzymes, Tannery effluent

 

 

 

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