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<p>Low-cost substrates are promising substitutes for bioprocesses that can impact microbial metabolism. In the present study Banana peel extract (BPE) medium as a fermentation medium was compared to commercial optimized LB medium for bacterial consortia (<i>Bacillus cereus</i> SBS1 and <i>Bacillus thuringiensis</i> SBS3) for optimization of Cr (VI) bioremediation. Plackett–Burman design was utilized for optimization of factors, where ammonium chloride, inoculum size, sodium chloride and pH showed significant effects on Cr (VI) reduction. Commercial medium was optimized with 1% NH<sub>4</sub>Cl, 0. 7% yeast extract, 0. 3% NaCl, and 2% dextrose) and physical parameters (pH—7.0, temperature—37&#xa0;°C). The growth of bacteria and percentage of Cr (VI) reduction were analyzed. The Cr (VI) reduction was 80% in BPE medium which was 60% in commercial modified LB medium. The strains optimized in BPE medium when employed for the treatment of industrial effluents in a 5 lt bioreactor showed 90% Cr (VI) reduction. BPE can serve as a suitable medium for effective Cr (VI)) bio reduction at bioreactor level and provide a cost effective and eco-friendly alternative for large scale bioremediation of industrial effluents.</p>

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Effective bioremediation of chromium(VI) by a bacterial consortium for decontamination of Industrial effluents using low-cost substrates

  • 期刊论文

  • 发表日期：

    2025年9月25日

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  • Sruthi Kalva,
  • N. Narendher,
  • Sriya Reddy Patlolla,
  • J. Sreenivasa Rao,
  • Sandeepta Burgula

摘要

Low-cost substrates are promising substitutes for bioprocesses that can impact microbial metabolism. In the present study Banana peel extract (BPE) medium as a fermentation medium was compared to commercial optimized LB medium for bacterial consortia (Bacillus cereus SBS1 and Bacillus thuringiensis SBS3) for optimization of Cr (VI) bioremediation. Plackett–Burman design was utilized for optimization of factors, where ammonium chloride, inoculum size, sodium chloride and pH showed significant effects on Cr (VI) reduction. Commercial medium was optimized with 1% NH4Cl, 0. 7% yeast extract, 0. 3% NaCl, and 2% dextrose) and physical parameters (pH—7.0, temperature—37 °C). The growth of bacteria and percentage of Cr (VI) reduction were analyzed. The Cr (VI) reduction was 80% in BPE medium which was 60% in commercial modified LB medium. The strains optimized in BPE medium when employed for the treatment of industrial effluents in a 5 lt bioreactor showed 90% Cr (VI) reduction. BPE can serve as a suitable medium for effective Cr (VI)) bio reduction at bioreactor level and provide a cost effective and eco-friendly alternative for large scale bioremediation of industrial effluents.