Anoxic treatment of phenolic wastewater in sequencing batch reactor |
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Authors: | Sarfaraz Sami Thomas Swapna Tewari U K Iyengar Leela |
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Affiliation: | Biotechnology Laboratory, Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India. |
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Abstract: | Studies were conducted on the anoxic phenol removal using granular denitrifying sludge in sequencing batch reactor at different cycle lengths and influent phenol concentrations. Results showed that removal exceeded 80% up to an influent phenol concentration of 1050 mg/l at 6 h cycle length, which corresponded to 6.4 kg COD/m3/d. Beyond this, there was a steep decrease in phenol and COD removal efficiencies. This was accompanied by an increase in nitrite concentration in the effluent. On an average, 1 g nitrate-N was consumed per 3.4 g phenol COD removal. Fraction of COD available for sludge growth was calculated to be 11%. |
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Keywords: | Anoxic degradation Denitrification Granular sludge Phenol Sequencing batch reactor |
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