Bioremediation of Alkaline Textile Effluent by Corynebacterium casei: Evaluation of Physicochemical Parameter Reduction
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Abstract
Introduction: Textile wastewater is a significant environmental issue due to its high organic loads, dissolved salts, and nutrient pollutants, which can threaten water quality and aquatic ecosystems.
Objectives: The present study evaluated the bioremediation potential of Corynebacterium casei for the treatment of raw textile effluent and 50 and 25% diluted effluent.
Methods: The present study evaluated the bioremediation potential of Corynebacterium casei for treating raw textile effluent and 50% and 25% diluted effluent. The efficacy of bacterial treatment was evaluated by comparing relevant physicochemical parameters before and after effluent treatment, including electrical conductivity (EC), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total dissolved solids (TDS), sulphate, phosphate, and nitrate content.
Results: bacterial treatment led to distinct reductions in pollutant load across effluent concentrations. In raw effluent, mean BOD value was reduced from 393.1 to 54.4 mg/L, COD value from 3932.7 to 1720.2 mg/L, EC reduced from 15.3 to 8.3, TDS reduced 10840.3 to 6276.7mg/L, sulphate reduced 411.0 to 108.8 mg/L, phosphate reduced from 12.7 to 2.5 mg/L and nitrate reduced from 54.4 to In 50% diluted effluent mean BOD was reduced from 284.5 to 32.4 mg/L, COD was reduced from 2277.6 to 1240.4 mg/L and TDS was reduced from 7656.3 to 4646.2 mg/L. At the same time, nutrient ions were also significantly reduced following treatment. The 25% diluted effluent exhibited the best overall treatment performance, with the mean BOD, COD, EC, TDS, sulphate, phosphate, and nitrate being reduced to 17.6 mg/L, 299.2 mg/L, 2.8, 1827.0 mg/L, 31.0 mg/L, 0.7 mg/L, and 1.1 mg/L, respectively.
Conclusions: The research supports the concept of bacterial treatment as an eco-friendly and sustainable way of reducing the physicochemical pollution load of textile wastewater before discharging it into the environment.