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Article

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

1
Department of Mechanical and Industrial Engineering Technology, University of Johannesburg, Johannebsurg 2006, South Africa
2
School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool L2 2QP, UK
*
Author to whom correspondence should be addressed.
Academic Editors: Iyyakkannu Sivanesan and Muthu Thiruvengadam
Sustainability 2021, 13(12), 6529; https://doi.org/10.3390/su13126529
Received: 16 May 2021 / Revised: 26 May 2021 / Accepted: 29 May 2021 / Published: 8 June 2021
(This article belongs to the Special Issue Chemical Pollution, Prevention, and Environmental Sustainability)
The development of low-operational-cost and low-operational-complexity active sulphate (SO4) 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, SO4 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 SO4 loading rate while reducing the organic loading rate was undertaken to identify performance limiting conditions. A daily average SO4 concentration reduction rate of 55.2% was achieved over the initial 13 days of the experiments. The study found that a COD to SO4 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. View Full-Text
Keywords: Acid Mine Drainage (AMD); anaerobic digestion; bioreactor; biological sulphate reduction; bioremediation; biological treatment Acid Mine Drainage (AMD); anaerobic digestion; bioreactor; biological sulphate reduction; bioremediation; biological treatment
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MDPI and ACS Style

Thisani, S.K.; Kallon, D.V.V.; Byrne, P. A Fixed Bed Pervious Concrete Anaerobic Bioreactor for Biological Sulphate Remediation of Acid Mine Drainage Using Simple Organic Matter. Sustainability 2021, 13, 6529. https://doi.org/10.3390/su13126529

AMA Style

Thisani SK, Kallon DVV, Byrne P. A Fixed Bed Pervious Concrete Anaerobic Bioreactor for Biological Sulphate Remediation of Acid Mine Drainage Using Simple Organic Matter. Sustainability. 2021; 13(12):6529. https://doi.org/10.3390/su13126529

Chicago/Turabian Style

Thisani, Sandisiwe K., Daramy V.V. Kallon, and Patrick Byrne. 2021. "A Fixed Bed Pervious Concrete Anaerobic Bioreactor for Biological Sulphate Remediation of Acid Mine Drainage Using Simple Organic Matter" Sustainability 13, no. 12: 6529. https://doi.org/10.3390/su13126529

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