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Coal Mine Acid Mine Drainage Treatment and Sludge Processing
Expanded Title:In this study a modified CSIR alkaline barium calcium (ABC) process consisting of a water treatment stage and a thermal process stage, was evaluated on coal mine acid mine drainage (AMD). The AMD treatment went through the following treatment stages; neutralization using calcium hydroxide (pH 8), metal removal using H2S, magnesium removal using calcium hydroxide (pH 12) and sulphate removal using barium carbonate. The simulated barite/calcite sludge prepared in the laboratory using commercial reagents was subjected to a thermal process in the presence of carbon. The study indicated that gypsum formation can be reduced by 80 % during the water treatment stage, thereby reducing the amount of gypsum that needs to be processed using the costly GypSLim process to 20 %. Temperature, reaction time, carbon/barite molar ratio, calcite/barite molar ratio and feed PSD were shown to have an effect on the thermal processing of the barite/calcite sludge. The capital and running cost estimate of the CSIR ABC process is included as Appendix A in this report.
Date Published:15/03/2010
Document Type:Research Report
Document Subjects:Agricultural Water - Rainwater harvesting, Mine water - Closure and rehabilitation, Mine water - Impact prediction, Mine water - Tailings facilities, Mine water - Mine water treatment
Document Keywords:Environment
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
Authors:Coaltech 2020
Project Leader:SR Motaung
Project No:SP 59
Organizations:Natural Resources and the Environment; COALTECH 2020
Document Size:858 KB
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