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A Fixed Bed Pervious Concrete Anaerobic Bioreactor for Biological Sulphate Remediation of Acid Mine Drainage Using Simple Organic Matter

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  • Sandisiwe Khanyisa Thisani

    (Department of Mechanical and Industrial Engineering Technology, University of Johannesburg, Johannebsurg 2006, South Africa)

  • Daramy Vandi Von Kallon

    (Department of Mechanical and Industrial Engineering Technology, University of Johannesburg, Johannebsurg 2006, South Africa)

  • Patrick Byrne

    (School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool L2 2QP, UK)

Abstract

The development of low-operational-cost and low-operational-complexity active sulphate (SO 4 ) reducing bioremediation for Acid Mine Drainage (AMD) is an ongoing pursuit towards sustainable mining. This study introduces a fixed bed pervious concrete anaerobic bioreactor as a second stage AMD remediation process. The study investigated the pH self-regulation capabilities, SO 4 remediation capabilities and the rate limiting parameters of the bioreactor using glucose as an organic matter source. The AMD was pre-treated using a permeable reactive barrier. A 21-day trial comprised of an increase in the SO 4 loading rate while reducing the organic loading rate was undertaken to identify performance limiting conditions. A daily average SO 4 concentration reduction rate of 55.2% was achieved over the initial 13 days of the experiments. The study found that a COD to SO 4 ratio and VFA to alkalinity ratio below 5:1 and 0.5:1 respectively were performance limiting. The bioreactor was capable of self-regulating pH within the neutral range of 6.5 and 7.5. The study findings indicate that the bioreactor design can reduce operational costs and operational complexity of active AMD bioremediation.

Suggested Citation

  • Sandisiwe Khanyisa Thisani & Daramy Vandi Von Kallon & Patrick Byrne, 2021. "A Fixed Bed Pervious Concrete Anaerobic Bioreactor for Biological Sulphate Remediation of Acid Mine Drainage Using Simple Organic Matter," Sustainability, MDPI, vol. 13(12), pages 1-18, June.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:12:p:6529-:d:570944
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    References listed on IDEAS

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    1. Sandisiwe Khanyisa Thisani & Daramy Vondi Von Kallon & Patrick Byrne, 2020. "Geochemical Classification of Global Mine Water Drainage," Sustainability, MDPI, vol. 12(24), pages 1-16, December.
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    Cited by:

    1. Sandisiwe Khanyisa Thisani & Daramy Vandi Von Kallon & Patrick Byrne, 2021. "Effects of Contact Time and Flow Configuration on the Acid Mine Drainage Remediation Capabilities of Pervious Concrete," Sustainability, MDPI, vol. 13(19), pages 1-17, September.
    2. Sandisiwe Khanyisa Thisani & Daramy Vandi Von Kallon & Patrick Byrne, 2021. "Review of Remediation Solutions for Acid Mine Drainage Using the Modified Hill Framework," Sustainability, MDPI, vol. 13(15), pages 1-20, July.

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