Publication: Effect of substrate on the performance of laboratory-scale vertical bed flow systems for acid mine drainage treatment
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Date
2024-08-01
Authors
Muhd Adi Affandi Bin Mohd Ruzaidi
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Abstract
Organic substrate is employed in the remediation of acid mine drainage (AMD) due to its natural efficacy in mitigating the environmental consequences associated with acidic mine runoff. With its elevated organic content, organic substrate serves as an effective sorbent for metals and functions as an acidity buffer. This study aims to correlate the organic substrate thickness against study parameters which are dissolved oxygen (DO), oxidation-reduction potential (ORP), pH, and concentration metals parameters. In addition, the purpose of this study also to characterize the condition of peat soil as substrate in treating acid mine drainage before and after laboratory-scale experiments. This experiment will be implemented as a vertical flow system where AMD flows downward passing the peat soil layer and subsequently into the limestone bed placed beneath the organic layer. The ratio thickness of peat soil to the limestone used is 1:1 (10cm), 2;1 (20cm), and 3:1 (30 cm) of thickness. The thickest peat soil layer in the VFBS column which is 30 cm more successful in achieving the desired positive parameter. Reasonably enough, a thicker peat soil layer provides more long-term sustainability in treating acid mine drainage by producing higher final pH, lower ORP, DO and metal concentration in AMD. In conclusion, the knowledge gained from this work will be highly beneficial in increasing the effectiveness of the treatment of Acid Mine Drainage (AMD) using organic substrate which provides low-cost treatment in real situations.