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New developments in reactor and process technology for sulfate reduction.

L W Pol1, P N Lens, J Weijma

  • 1Sub-Department of Environmental Technology, Wageningen University, The Netherlands.

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|December 4, 2001
PubMed
Summary
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Sulfate reduction, once unwanted, is now recognized for treating sulfur and heavy metal contaminants in wastewater. This review discusses passive and active bioreactor strategies for effective removal.

Area of Science:

  • Environmental microbiology
  • Environmental chemistry
  • Wastewater treatment technologies

Background:

  • Sulfate reduction was historically viewed negatively in anaerobic wastewater treatment due to hydrogen sulfide (H2S) production and microbial competition.
  • Focus was on mitigating H2S toxicity and suppressing sulfidogenesis.
  • Recent research highlights sulfidogenesis's potential for treating diverse wastewaters.

Purpose of the Study:

  • To review the dual role of sulfate reduction in wastewater treatment.
  • To explore its application in removing oxidized sulfur compounds and heavy metals.
  • To discuss current treatment strategies.

Main Methods:

  • Literature review of sulfate reduction processes in wastewater treatment.
  • Analysis of heavy metal removal via metal sulfide precipitation.

Related Experiment Videos

  • Comparison of passive and active bioreactor treatment approaches.

    • Main Results:

    • Sulfate reduction can effectively remove heavy metals through precipitation of insoluble metal sulfides.
    • Two main treatment strategies exist: passive systems and active bioreactors.
    • Both approaches offer viable solutions for contaminated wastewater.

    Conclusions:

    • Sulfate reduction is a valuable process for treating sulfurous and metal-contaminated wastewaters.
    • Passive and active treatment strategies provide effective methods for pollutant removal.
    • Further research can optimize these biotechnologies for industrial applications.