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Related Experiment Videos

Nitrification in biofilters under variable load and low temperature.

J P Canler1, J M Perret, F Lengrand

  • 1Cemagref, 3 bis, quai Chauveau, CP 220, 69 336 Lyon Cedex 09, France.

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|August 9, 2003
PubMed
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Biofiltration in mountain wastewater treatment plants effectively removes ammonia, even in cold winter conditions. Proper filter operation is key to handling sudden load increases and ensuring consistent treatment performance.

Area of Science:

  • Environmental Engineering
  • Wastewater Treatment Technologies
  • Biofiltration Systems

Background:

  • European legislation drives wastewater treatment plant upgrades.
  • Biofiltration is considered for mountain area plants.
  • Winter conditions pose design challenges for low temperatures and variable loads.

Purpose of the Study:

  • To investigate biofiltration performance in mountain wastewater treatment plants during winter.
  • To assess ammonia removal capacity under low temperatures and fluctuating loads.
  • To understand nitrifying biomass dynamics and operational strategies.

Main Methods:

  • Monitoring a biofiltration plant over two consecutive winters.
  • Measuring nitrification capacity at varying influent temperatures.

Related Experiment Videos

  • Analyzing nitrifying biomass growth rates.
  • Evaluating filter response to short-term load variations.

    • Main Results:

    • Maximal nitrification capacity reached 0.59 kg N-NO3- x m(-3) x d(-1) at 7°C.
    • Nitrifying biomass growth rate was 0.03 kg N-NO3- x m(-3) x d(-2).
    • Pre-operational filter management is crucial for handling peak loads.

    Conclusions:

    • Biofiltration is a viable complementary treatment for ammonia removal in cold climates.
    • Optimized operation strategies are necessary to manage variable loads and ensure treatment efficiency.
    • Further research into winter biofiltration design parameters is warranted.