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Related Experiment Videos

Novel biotreatment process for glycol waters.

L M Raja1, G Elamvaluthy, R Palaniappan

  • 1Centre for Research and Development, Southern Petrochemical Industries Corporation, Ltd., Tuticorin, India.

Applied Biochemistry and Biotechnology
|January 1, 1991
PubMed
Summary

A novel microbiological process effectively biodegrades over 90% of chemical pollutants in industrial wastewater. This robust method utilizes specialized bacteria and tolerates high salinity, pH, and temperature variations.

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Area of Science:

  • Environmental microbiology
  • Industrial biotechnology
  • Wastewater treatment

Background:

  • Propylene oxide (PO), propylene glycol (PG), and polyols production generates effluents with high biological oxygen demand/chemical oxygen demand (BOD/COD) and chloride concentrations.
  • Elevated salinity in industrial wastewater inhibits conventional treatment methods like activated sludge processes.

Purpose of the Study:

  • To develop a simple, economically viable, and versatile microbiological process for treating high-salinity industrial effluents.
  • To achieve high biodegradation efficiency (over 90%) for BOD/COD loads.

Main Methods:

  • Utilized specially developed strains of Pseudomonas and Aerobacter for biodegradation.
  • Investigated the two-step biodegradation pathway of glycols.

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  • Evaluated process performance in lab-scale (50 L) and pilot-scale (20 m3) bioreactors.

    • Main Results:

    • Achieved over 90% biodegradation of BOD/COD loads.
    • The process demonstrated tolerance to high salinity (up to 10 wt% NaCl or 5 wt% CaCl2).
    • The system exhibited robustness across a wide pH range (5.5-11.0) and temperature range (15-45 degrees C).

    Conclusions:

    • The developed microbiological process offers an effective and versatile solution for treating high-salinity industrial wastewater.
    • The specialized bacterial strains and process conditions enable efficient degradation of glycols and associated pollutants.
    • This approach presents a sustainable and economically viable alternative to conventional wastewater treatment methods.