Sequencing batch reactor treatment of tannery wastewater for carbon and nitrogen removal

Istanbul Organized Leather Tanning Industrial District Aydinli, Tuzla, Turkey.
Water Science & Technology (Impact Factor: 1.11). 02/2002; 46(9):219-27.
Source: PubMed


The paper evaluates the organic carbon and nitrogen removal performance of the sequencing batch reactor (SBR), technology for tannery wastewater. For this purpose, a pilot-scale SBR was installed on site to treat the plain-sealed tannery effluent. The study involved wastewater characterization, start-up and operation of the reactor for carbon and nitrogen removal and model evaluation of system performance. Its removal efficiency was compared with that of the existing continuous-flow activated sludge system providing full treatment to wastewater from the Istanbul Tannery Organized Industrial District.

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    • "It should be noted that aside from nitrification, which determines the magnitude of, oxidized nitrogen, the V 0 /V F ratio plays a dominant role in setting the available nitrate for denitrification and therefore the effluent NO X -N concentration. In this study, an effluent NO X -N level in the range of 11–14 mgl –1 could be achieved with a V 0 /V F ratio of 5, whereas in a similar previous study, a single cycle operation corresponding to V 0 /V F = 2 could only secure a much higher NO X -N concentration of 25 mgl –1 (Murat et al., 2002). "
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    ABSTRACT: The effect of temperature on the nitrogen removal performance of the sequencing batch reactor technology is evaluated for tannery wastewater. The study involved the operation of a pilot-scale sequencing batch reactor installed on site to treat the plain-settled effluent. The nitrogen balance of the system is observed for a wide temperature range between 9 to 30 degrees C. The results are evaluated by means of model calibration of COD, nitrate and ammonia nitrogen concentration profiles during cyclic operation. The fates of the major nitrogen parameters are also interpreted on the basis of fundamental stoichiometry for nitrification and denitrification.
    No preview · Article · Feb 2003 · Water Science & Technology
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    • "High amounts of process water is required together with various high consumption of chemicals such as chromium, urea, solvents in leather processing industry. The strong characteristics of wastewater exhibits high Chemical Oxygen Demand (COD) and Total Kjeldahl Nitrogen (TKN) levels around 2500 mgCOD/L and 240 mgN/L, respectively after the primary sedimentation (Ateş, 1997; Murat et al., 2002). Considering the EU discharge standards, high treatment efficiencies are required to achieve optimal COD and nitrogen removal. "
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