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<p>Two-moved bed biofilm reactors were used for nitrogen (N) removal from Tunisian secondary effluent. The first one is aerated MBBR with a volume of 1 m<sup>3</sup> and filled to 44% of its capacity with Pearl EvU materials. The second reactor is anoxic with a volume of 15L and filled with 36% of the same carrier materials. The aerated MBBR removed 70 ± 20% of N-NH<sub>4</sub> at a hydraulic retention time of 2.75 ± 0.77&#xa0;h, and a temperature of 18 ± 5.42 ℃. The specific area removal load (SARR) is 0.32 ± 0.18 gN-NH<sub>4</sub>/m<sup>2</sup>.d. using aerated MBBR. However, the anoxic MBBR removed 44.49 ± 28.52%, 60.56 ± 30.43%, 66.81 ± 30.33%, and 23.51 ± 24.95% for COD, N-NH<sub>4</sub>, N-NO<sub>3</sub> and PO<sub>4</sub> respectively at T, pH, and HRT of 18.04 ± 2.53,7.76 ± 0.37, 4.32 ± 6.05 d and SARR of 0.02 ± 0.04&#xa0;g-N-NO<sub>3</sub>/m<sup>2</sup>.d. The aerated MBBR was modeled using ASM1 and simulated using GPS.X software 7.0. The optimized parameters for model calibration were i<sub>cv</sub> 2.4, frS<sub>I</sub> 0.1, frX<sub>S</sub> 0.74, frX<sub>H</sub> 0.2, Y<sub>H</sub> 0.54, µ<sub>H</sub> 2.3 d<sup>−1</sup>, K<sub>S</sub> 50&#xa0;mg/L, K<sub>NO</sub> 1.3&#xa0;mg/L and K<sub>NH</sub> 0.9&#xa0;mg/L. The model predicts the effluent aerated MBBR quality at the optimum volume fraction of carrier material of 0.44 with a standard deviation of 13.32, 3.2 and 2.98 for COD, N-NH<sub>4,</sub> and N-NO<sub>3</sub> respectively. Simulated biofilm thickness was in the range of 150–302&#xa0;µm. </p>

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Modeling and simulation of nitrogen removal from Tunisian secondary urban effluent using moved bed biofilm reactor

  • 期刊论文

  • 发表日期：

    2025年6月13日

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  • Hayet Cherif,
  • Henry Risse,
  • Ibtissem BenMansour,
  • Hedi Shayeb,
  • Hamza Elfil

摘要

Two-moved bed biofilm reactors were used for nitrogen (N) removal from Tunisian secondary effluent. The first one is aerated MBBR with a volume of 1 m3 and filled to 44% of its capacity with Pearl EvU materials. The second reactor is anoxic with a volume of 15L and filled with 36% of the same carrier materials. The aerated MBBR removed 70 ± 20% of N-NH4 at a hydraulic retention time of 2.75 ± 0.77 h, and a temperature of 18 ± 5.42 ℃. The specific area removal load (SARR) is 0.32 ± 0.18 gN-NH4/m2.d. using aerated MBBR. However, the anoxic MBBR removed 44.49 ± 28.52%, 60.56 ± 30.43%, 66.81 ± 30.33%, and 23.51 ± 24.95% for COD, N-NH4, N-NO3 and PO4 respectively at T, pH, and HRT of 18.04 ± 2.53,7.76 ± 0.37, 4.32 ± 6.05 d and SARR of 0.02 ± 0.04 g-N-NO3/m2.d. The aerated MBBR was modeled using ASM1 and simulated using GPS.X software 7.0. The optimized parameters for model calibration were icv 2.4, frSI 0.1, frXS 0.74, frXH 0.2, YH 0.54, µH 2.3 d−1, KS 50 mg/L, KNO 1.3 mg/L and KNH 0.9 mg/L. The model predicts the effluent aerated MBBR quality at the optimum volume fraction of carrier material of 0.44 with a standard deviation of 13.32, 3.2 and 2.98 for COD, N-NH4, and N-NO3 respectively. Simulated biofilm thickness was in the range of 150–302 µm.