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[Numerical simulation and operation optimization of biological filter].

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    Huan Jing Ke Xue= Huanjing Kexue
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    This summary is machine-generated.

    Optimizing wastewater treatment, this study simulated the Denitrification Biological Filter (DNBF) + Biological Aerated Filter (BAF) process. Key findings identified optimal conditions for meeting discharge standards A and B.

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    Area of Science:

    • Environmental Engineering
    • Water Treatment Technologies
    • Wastewater Management

    Background:

    • The Denitrification Biological Filter (DNBF) and Biological Aerated Filter (BAF) are crucial for advanced wastewater treatment.
    • Optimizing these processes is essential for meeting stringent environmental discharge standards.

    Purpose of the Study:

    • To simulate and optimize the DNBF + BAF process using BioWin software.
    • To identify the most sensitive parameters affecting the process performance.
    • To determine the best operational conditions for achieving different discharge standards.

    Main Methods:

    • Utilized BioWin software for process simulation.
    • Employed sensitivity analysis and model calibration/validation using historical operational data.
    • Simulated various operational scenarios for process optimization.

    Main Results:

    • The calibrated BioWin model accurately represented the practical DNBF + BAF processes.
    • Sensitive parameters included those related to biofilm, oxygen-consuming heterotrophs (OHOs), and aeration.
    • Optimal conditions for discharge standard B: 50% reflux ratio, no methanol, C/N ratio of 4.43.
    • Optimal conditions for discharge standard A: 50% reflux ratio, 155 mg/L influent COD post-methanol, C/N ratio of 5.10.

    Conclusions:

    • The developed model provides a reliable tool for simulating and optimizing DNBF + BAF systems.
    • Process optimization can significantly improve effluent quality to meet regulatory requirements.
    • Specific operational adjustments can be made to achieve either standard A or B discharge limits effectively.