Abstract
The biological treatment of textile effluent is enhanced by the use of zinc oxide (ZnO) nanoparticles for the reduction in chemical oxygen demand (COD) from its initial value of 1700 ppm. The present research investigated the effect of ZnO nanoparticles when microbial cultures of Pseudomonas putida and Pseudomonas aureofaciens were used to treat textile effluent in three-phase inverse fluidized bed bioreactor. The parameters like—size of ZnO nanoparticles, static bed height, superficial gas velocities and solid media particle size—together affected the COD reduction and all of these were investigated in this paper. ZnO nanoparticles of 280 nm reduced the maximum COD to 47 ppm (97.24%) at low gas velocity of 0.0027 m/s at 10% inoculum size and at a static bed height of 2.43 cm.
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Acknowledgements
Mr. Dharmesh H Sur acknowledges the help provided by Dr. Jaysukh Marakana and Mr. Chirag Savaliya of Department of Nanotechnology, V V P Engineering College, Rajkot. The author remains grateful for the support provided by the management of V V P Engineering College, Rajkot, Gujarat (India).
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Sur, D.H., Mukhopadhyay, M. Role of zinc oxide nanoparticles for effluent treatment using Pseudomonas putida and Pseudomonas aureofaciens. Bioprocess Biosyst Eng 42, 187–198 (2019). https://doi.org/10.1007/s00449-018-2024-y
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DOI: https://doi.org/10.1007/s00449-018-2024-y