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Related Experiment Videos

A continuous biological process to decolorize bleach plant effluents.

T W Joyce1, H Chang, A G Campbell

  • 1North Carolina State University, Raleigh, NC, USA.

Biotechnology Advances
|January 1, 1984
PubMed
Summary

The MyCoR Process uses the fungus Phanerochaete chrysosporium to effectively remove color from pulp mill wastewater. This novel biological treatment also reduces chemical oxygen demand and biochemical oxygen demand.

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Area of Science:

  • Environmental biotechnology
  • Industrial microbiology
  • Wastewater treatment

Background:

  • Pulp mills utilize biological wastewater treatment, but bacterial systems are ineffective at color removal.
  • Bleached Kraft mill effluent color originates from the first extraction stage of the bleach plant.

Purpose of the Study:

  • To investigate the efficacy of Phanerochaete chrysosporium in a novel wastewater treatment process (MyCoR Process) for color removal.
  • To assess the removal of chemical oxygen demand (COD) and biochemical oxygen demand (BOD).
  • To evaluate the dechlorination of chlorolignins in the effluent.

Main Methods:

  • Utilized Phanerochaete chrysosporium in a rotating biological contactor (RBC) for decolorization of bleached Kraft mill wastewater.
  • Operated the MyCoR Process under optimal conditions for color removal.

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  • Analyzed effluent for color, COD, BOD, and dechlorinated chlorolignins.

    • Main Results:

    • The MyCoR Process achieved optimal color removal of up to 2,000 color units/L/day.
    • Concomitant removal of COD and BOD was observed.
    • Chlorolignins were found to be dechlorinated, indicating reduced environmental impact.

    Conclusions:

    • The MyCoR Process, using Phanerochaete chrysosporium, offers an effective method for decolorizing pulp mill wastewater.
    • The process shows potential for reducing the environmental impact of bleach plant effluents.
    • Further development of fungal strains could decrease the cost of US$30/metric ton of bleached Kraft pulp.