Abstract
A bioreactor for the removal of nitrate nitrogen (NO3-N) from industrial effluent is described which is comprised of a glass column (60 cm × 6 cm) packed with alginate beads containing denitrifying organisms Pseudomonas stutzeri and Comamonas testosteroni. The effluent containing high concentrations of nitrate (600–950 mg l−1) from the fertilizer industry and fusel oil (methanol as a major component) as organic carbon were used in the process. The reactor is operated in the continuous mode by injecting the pretreated nitrate-containing effluent at the top of the column. The Hydraulic retention time (HRT) was adjusted by changing the flow rates. When nitrate-containing wastewater was treated with immobilized cells, the nitrate removal rate reached a maximum 1.66 ± 0.07 Kg NO3-N m−3d−1 at an influent NO3-N concentration of 850 mg NO3M-N l−1within 12 h. The denitrification activity of the immobilized cells was compared with that of the free cells.
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Zala, S.L., Ayyer, J. & Desai, A.J. Nitrate removal from the effluent of a fertilizer industry using a bioreactor packed with immobilized cells of Pseudomonas stutzeriandComamonas testosteroni . World Journal of Microbiology and Biotechnology 20, 661–665 (2004). https://doi.org/10.1007/s11274-004-9982-8
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DOI: https://doi.org/10.1007/s11274-004-9982-8