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Environmental engineering research v.15 no.2, 2010년, pp.79 - 84  
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Impact of Media Type and Various Operating Parameters on Nitrification in Polishing Biological Aerated Filters

Ha, Jeong-Hyub    (Department of Chemical Engineering, School of Environmental Science and Engineering, Pohang University of Science and Technology   ); Ong, Say-Kee    (Iowa State University, Department of Civil, Construction and Environmental Engineering   ); Surampalli, R.    (US EPA  );
  • 초록

    Three biological aerated filters (BAFs) composed of a PVC pipe with a diameter of 75 mm were constructed and operated at a waste-water temperature at $13^{\circ}C$ . The media used for each BAF were: 5-mm gravel; 5-mm lava rock; 12.5-mm diameter by 15-mm long plastic rings, all with a media depth of 1.7 m. The feedwater, which simulated the effluent of aerated lagoons, had influent soluble chemical oxygen demand (sCOD) and ammonia concentrations of approximately 50 and 25 mg/L, respectively. For a hydraulic retention time (HRT) of two hours without recirculation, ammonia percent removals were 98.5, 98.9, and 97.8%, for the gravel, lava rock, and plastic rings, respectively. By increasing the effluent recirculation from 100 to 200% for an HRT of one hour, respective ammonia removals improved from 90.1 to 96, 76.5 to 90, and 65.3 to 79.5% for gravel, lava rock, and plastic rings. Based on the ammonia and sCOD loadings for different HRTs, the estimated maximum ammonia loading was approximately 0.6 kg $NH_3-N/m^3$ -day for the three BAFs of different media types. The zero-order biotransformation rates for the BAF with gravel were found to be higher than the lava rock and plastic ring media. The results ultimately showed that BAF can be used as an add-on system to aerated lagoons or as a secondary treatment unit to meet ammonia discharge limits.


  • 주제어

    Nitrification .   Biological aerated filter .   Recirculation .   National Pollution Discharge Elimination System.  

  • 이미지/표/수식 (10)

    • Physical properties of media
    • Schematic diagram of the biological aerated filter system.
    • Composition of synthetic wastewater
    • Experimental operating conditions for biological aerated filters
    • Effect of media type and hydraulic retention time (HRT) on ammonia, chemical oxygen demand (COD), total Kjeldahl nitrogen (TKN), and alkalinity percent removals at a temperature of 13<sup>°</sup>C: (a) HRT = 2 hours; (b) HRT = 1 hour; (c) HRT = 0.5 hours (without recirculation).
    • Ammonia and chemical oxygen demand (COD) percent removals for 1-hour hydraulic retention time with no recirculation, 100%, and 200% recirculation.
    • Ammonia and nitrate concentrations along the depth of the media for different hydraulic retention times without recirculation: (a) 2 hours; (b) 1 hour; (c) 0.5 hours.
    • Effect of ammonia loadings on ammonia mass removed at a temperature of 13<sup>°</sup>: a) ammonia percent removal; b) effluent ammonia concentration; c) ammonia mass removed.
    • Estimation of zero-order ammonia biotransformation rates in the BAF for various HRTs and media types at 13 ± 1<sup>°</sup>

    논문관련 이미지

  • 참고문헌 (19)

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