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Related Experiment Videos

Key features of successful BNR operation.

J L Barnard1, K Abraham

  • 1Black & Veatch, 8400 Ward Parkway, Kansas City, MO, USA. barnardjl@bv.com

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|August 8, 2006
PubMed
Summary

Biological phosphorus removal is a reliable wastewater treatment method when properly understood and operated. Addressing issues like nitrates and sludge rates ensures predictable performance in biological nutrient removal systems.

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Comparative fluorescence and chromatographic studies of the plants used as vidari.

Ancient science of life·2012

Area of Science:

  • Environmental Engineering
  • Microbiology
  • Water Treatment

Background:

  • Biological phosphorus removal (BPR) technology, introduced in 1974, is widely implemented globally with diverse plant configurations.
  • While generally effective, BPR faces challenges perception of unreliability due to issues like nitrates, high recycle rates, secondary release, and toxicity.
  • Many plants report excellent removal, sometimes appearing to deviate from established BPR requirements, necessitating a deeper understanding of operational factors.

Purpose of the Study:

  • To address persistent issues hindering designers and operators in biological phosphorus removal.
  • To explain apparent anomalies in BPR performance and claims of excellent removal.
  • To reinforce the predictability and reliability of BPR when the process is thoroughly understood.

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Main Methods:

  • Review of operational data and case studies of biological phosphorus removal plants.
  • Analysis of factors influencing phosphorus release and uptake in biological systems.
  • Examination of design and operational parameters affecting BPR efficiency.

Main Results:

  • Identified key factors such as nitrates, return activated sludge rates, secondary phosphorus release, and toxicity as critical to BPR performance.
  • Provided explanations for observed variations in BPR efficiency, often linked to specific operational conditions or wastewater characteristics.
  • Demonstrated that seemingly anomalous results can be reconciled with established BPR principles when all factors are considered.

Conclusions:

  • Biological phosphorus removal is a predictable and reliable process.
  • Proper understanding of wastewater characteristics, design, and operation is crucial for successful BPR.
  • Addressing specific operational challenges can overcome the perception of unreliability in BPR systems.