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RR75 - Measurement of limiting oxygen concentration in sewage sludge drying plants

This study is concerned with establishing a suitable method for the determination of Limiting Oxygen Concentration (LOC), determining the effect of elevated temperature on LOC and the efficiency of nitrogen, steam and carbon dioxide in reducing oxygen to prevent dust explosions. The possibility of controlling combustion in bulk material by the use of inert gas is also investigated. It is concluded that, with nitrogen, a reduced oxygen level of about 6% (v/v) will control both the dust cloud explosion and smouldering powder risks.

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Updated 2010-03-19