of particulate matter in the gravel bed, the gravel is continuously
cleaned in a pneumatic system developed specifically for the EFB system.
At the same time the cleaned gravel is transported to the top of the
system to be used again in the filter.
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Collected dust is conveyed in dry, low pressure, low temperature air to a silo or bunker equipped with a small dust collector. This can be located practically anywhere in the plant, usually where other waste materials are deposited. No other conveying systems are needed.
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