Coaltech Research Association

Identify Remnant Coal Deposits for Potential Exploitation by Small Business Developments

Screening of near surface remnant coal for small scale miners in Mpumalanga, with a map of candidate areas and of ground already worked out.

by Deborah S Xaba & Lesley S Jeffrey | March 2002

What this report found

Shallow coal suitable for small scale opencast working was mapped in the northern Witbank and Highveld coalfields, using a limit of 30 m from surface to the top of the first seam. Most outcrop areas examined proved already mined out, and depth to the top seam increases southwards, though some ground remains available. Obtaining resource data was the main obstacle.

R1500,00

Description

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What this report found

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Treatment of Sulphate Rich Effluents with the Combined Electrolytic/Biological Process

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Laboratory work on producing hydrogen by electrolysis as the energy source for sulphate reducing bacteria, aimed at cutting the running cost of treating sulphate rich mine water.

What this report foundHydrogen for biological sulphate removal can be generated on site by electrolysis more cheaply than it can be bought.

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What this report found

Hydrogen for biological sulphate removal can be generated on site by electrolysis more cheaply than it can be bought. Stainless steel electrodes in acid mine drainage gave hydrogen at about a third of the bought in price while oxidising ferrous iron to ferric, which helps downstream treatment. Iron and zinc electrodes dissolved too quickly to be viable.

Markus Mathey

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