Bioremediation of Zn Using A Metal-Tolerant Bacterial Strain: Implications for Treatment of Manufacturing Effluents
Keywords:
Zinc bioremediation, Metal-tolerant bacteria, Industrial wastewater, BiosorptionAbstract
The increasing discharge of zinc (Zn)-containing effluents from manufacturing industries poses a significant environmental challenge due to its persistence, bioaccumulation potential, and toxicity at elevated concentrations. Conventional physicochemical methods for Zn removal, including ion exchange, membrane filtration, and advanced oxidation processes, often suffer from high operational costs, sludge generation, and limited efficiency under variable wastewater conditions. In this context, bioremediation using metal-tolerant bacterial strains has emerged as a sustainable and cost-effective alternative for heavy metal removal.
This study investigates the potential of a Zn-resistant bacterial strain for the remediation of zinc-contaminated industrial wastewater, with a particular focus on manufacturing effluents. The research integrates theoretical insights from microbial metal resistance mechanisms, adsorption kinetics, and wastewater characterization frameworks. The methodology involves isolation and characterization of metal-tolerant bacteria, evaluation of biosorption and bioaccumulation capacities, and assessment of operational parameters influencing Zn removal efficiency.
The findings demonstrate that metal-tolerant bacterial strains exhibit high Zn removal efficiency through mechanisms such as surface adsorption, intracellular accumulation, and enzymatic transformation. The results are consistent with prior studies indicating microbial adaptability in heavy metal environments and their capacity for effective bioremediation (Pratap et al., 2022). Furthermore, process optimization reveals that pH, temperature, initial metal concentration, and biomass density significantly influence treatment performance.
The study also highlights the integration potential of biological treatment with existing wastewater management systems, emphasizing hybrid approaches combining microbial treatment with adsorption or membrane processes. Despite promising outcomes, limitations related to scalability, microbial stability, and environmental variability remain critical challenges.
Overall, this research contributes to the advancement of eco-friendly wastewater treatment technologies by providing a comprehensive analysis of microbial Zn remediation and its implications for industrial effluent management. The study underscores the importance of developing robust,
scalable biotechnological solutions to address heavy metal pollution in manufacturing sectors.
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