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Related Experiment Videos

Phosphorus removal using novel crystallisation technology.

K Wood1, G Wood, D Prokop

  • 1DuPont Company, 1007 Market Street, Wilmington, DE 19898, USA. kenneth.n.wood@usa.dupont.com

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

A novel lime precipitation method effectively removed phosphorus from soy protein effluent to below 2 mg L(-1) without increasing salt levels. This technology offers an efficient solution for industrial wastewater phosphorus reduction.

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Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Industrial Wastewater Management

Background:

  • Soy protein facilities face challenges meeting stringent effluent phosphorus (P) limits (<2 mg L(-1)).
  • Previous P removal methods were ineffective or generated excessive sludge and high salt concentrations.
  • Discharge regulations necessitate advanced P reduction strategies for industrial effluents.

Purpose of the Study:

  • To evaluate a novel lime precipitation technology for effective phosphorus removal from soy protein manufacturing effluent.
  • To assess the technology's ability to meet stringent P discharge limits without increasing soluble salt levels.
  • To demonstrate a viable solution for industrial wastewater P management.

Main Methods:

  • Pilot-scale testing of a novel lime precipitation and crystallization technology.

Related Experiment Videos

  • Effluent analysis for total phosphorus (P) and soluble salt concentrations at pH 10.
  • Evaluation of particle settling characteristics and sludge generation.
  • Comparison with previously evaluated biological and chemical P removal methods.

    • Main Results:

    • The lime precipitation technology successfully reduced effluent P to <2 mg L(-1).
    • No increase in soluble salt levels was observed during the process.
    • Rapidly settling, filterable particles were produced with minimal carbonate removal.
    • Residual solids generation was significantly lower (40%) compared to full lime softening.

    Conclusions:

    • Novel lime precipitation with crystallization is a highly effective method for industrial P removal.
    • This technology meets strict environmental discharge standards for phosphorus without increasing salinity.
    • The system provides a sustainable and efficient solution for soy protein plant wastewater treatment.