In this study, the comparative performance of coagulation, ozone, coagulation + ozone + coagulation and potassium ferrate processes to remove chemical oxygen demand (COD), color, and toxicity from a highly polluted textile wastewater were evaluated. Experimental results showed that ferrate alone had no effect on COD, color and toxicity removal. Whereas, in combination with FeSO4, it has shown the highest removal efficiency of 96.5%, 83% and 75% for respective parameters at the optimal dose of 40 mgL−1 + 3 ml FeSO4 (1 M) in comparison with other processes. A seed germination test using seeds of Spinach (Spinacia oleracea) also indicated that ferrate was more effective in removing toxicity from contaminated textile wastewater. Potassium ferrate also produces less sludge with maximum contaminant removal, thereby making the process more economically feasible. Fourier transform infrared spectroscopy (FTIR) analysis also shows the cleavage of the chromophore group and degradation of textile wastewater during chemical and oxidation treatment processes.
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Research Article|
March 02 2017
Comparison of coagulation, ozone and ferrate treatment processes for color, COD and toxicity removal from complex textile wastewater
Sameena N. Malik;
Sameena N. Malik
1CSIR – National Environmental & Engineering Research Institute, Nehru Marg, Nagpur, Maharashtra, India
3Department of Energy Science & Engineering, Indian Institute of Technology, Bombay, Maharashtra, India
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Prakash C. Ghosh;
Prakash C. Ghosh
3Department of Energy Science & Engineering, Indian Institute of Technology, Bombay, Maharashtra, India
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Atul N. Vaidya;
Atul N. Vaidya
1CSIR – National Environmental & Engineering Research Institute, Nehru Marg, Nagpur, Maharashtra, India
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Vishal Waindeskar;
Vishal Waindeskar
2Ozone Research and Application (I) Pvt Ltd, Nagpur, Maharashtra, India
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Sera Das;
Sera Das
1CSIR – National Environmental & Engineering Research Institute, Nehru Marg, Nagpur, Maharashtra, India
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Sandeep N. Mudliar
1CSIR – National Environmental & Engineering Research Institute, Nehru Marg, Nagpur, Maharashtra, India
E-mail: [email protected]
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Water Sci Technol (2017) 76 (5): 1001–1010.
Article history
Received:
August 22 2016
Accepted:
January 19 2017
Citation
Sameena N. Malik, Prakash C. Ghosh, Atul N. Vaidya, Vishal Waindeskar, Sera Das, Sandeep N. Mudliar; Comparison of coagulation, ozone and ferrate treatment processes for color, COD and toxicity removal from complex textile wastewater. Water Sci Technol 6 September 2017; 76 (5): 1001–1010. doi: https://doi.org/10.2166/wst.2017.062
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