Degradation and detoxification of leather tannery effluent by a newly developed bacterial consortium GS-TE1310 for environmental safety. (December 2020)

• Record Type: Journal Article
• Authors: Saxena, Gaurav; Purchase, Diane; Mulla, Sikandar I.; Bharagava, Ram Naresh
• Is Part Of: Journal of water process engineering. Volume 38(2020)
• Publication Date: 2020-12
• Subjects: Tannery effluent -- Bacterial consortium -- Bioremediation -- GC–MS analysis -- FT-IR analysis -- Phytotoxicity; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2020.101592
• Languages: English
• ISSNs: 2214-7144

Abstract

Graphical abstract: Highlights: A novel bacterial consortium GS-TE1310 was used to degrade real tannery effluent. Consortial treatment showed noticeable reduction in all the pollution parameters. HP-LC, FT-IR and GC–MS analysis confirmed the degradation of organic pollutants. Consortial treatment also led to substantial amelioration of phytotoxic effects. Bacterial consortium showed astounding potential for tannery effluent treatment. Abstract: The untreated/partially treated effluent discharged from leather tanning industries is heavily polluting our water and soil resources. Hence, the adequate treatment/detoxification of tannery effluent (TE) is required before its safe disposal into the environment. In the present study, an effective degradation of real TE was attained by a newly developed bacterial consortium GS-TE1310 within 120 h with 76.12, 85.32, 71.89, 48.59, 78.81, 69.53, 71.22, and 88.70 % reduction in pollution parameters such as COD, BOD, TDS, phosphate, sulphate, nitrate, Cr, and phenol, respectively. The HP-LC, FT-IR, and GC–MS study showed that most of the organic contaminants identified in the untreated TE were completely mineralized/degraded into new degradation products in the treated TE by the newly developed bacterial consortium GS-TE1310 at 7 pH, 0.5 % glucose and ammonium chloride, 120 rpm, and 20 mL inoculum volume. Further, the bacterially treated TE was used for the phytotoxicity evaluation using Phaseolus aureus L as a terrestrial model organism. Results revealed that the toxicity of bacterially treated TE was significantly reduced, allowing the 70 % germination of seeds, and thus, confirmed the detoxification of leather TE. Overall, the newly developed bacterial consortium GS-TE1310 demonstrated a remarkable potential to efficiently treat/detoxify leather TE for environmental safety.