• Title/Summary/Keyword: 선단무산소조

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Nitrogen and Phosphorus Removal Characteristics of a New Biological Nutrient Removal Process with Pre-Denitrification by Pilot Scale and Computer Simulation Program (선단무산소조를 이용한 영양소제거공정(Bio-NET)의 질소·인 제거 특성)

  • Oh, Young-Khee;Oh, Sung-Min;Hwang, Yenug-Sang;Lee, Kung-Soo;Park, No-Yeon;Ko, Kwang-Baik
    • Journal of Korean Society of Environmental Engineers
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    • v.22 no.1
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    • pp.121-132
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    • 2000
  • This study is to investigate the performance of a new BNR process using predenitrification scheme focusing on nitrogen removal and the possibility of adapting a computer simulation scheme in BNR process development. By using a pre-denitrification basin, higher $COD/NO_3-N$ ratio could be sustained in this BNR process. The results of the investigation showed a SDNR value of 9.04mg/gMv/hr. In the anoxic tank, the average value of SPRR of 6.25mgP/gMv/hr was observed to be very sensitive to SCOD load of influents. By calibrating internal parameters (stoichiometric and kinetic parameters) of the simulation model, the results of simulation for various BNR processes gave good agreement with observed data. The major adjustment was given with three parameters, maximum specific growth rate of heterotrophic biomass, short chain fatty acid (SCFA) limit, and phosphorous release rate. With the series of simulations on varying operational conditions, the simulation by computer program can be a useful tool for process selection, and design and operation of municipal wastewater treatment plant.

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