Abstract

Waste by-products from various industries can be successfully applied to treat acidic drainage. The advantages of utilizing waste material for treatment of other wastes include cost savings, greenhouse gas reduction (from lime) and reduced waste management requirements. Several waste products and their treatment effectiveness were evaluated. The performance of papermill sludge, cement kiln dust (CKD), lime kiln dust (LKD), and calcium magnesium hydrate (CMH) were assessed in terms of treatment efficiency and environmental performance. This study found that these alternative reagents could be used to replace lime in mine water treatment. Significant greenhouse gas (GHG) and reagent cost savings could be realized if lime was replaced with 'waste' or alternative low cost reagents.

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