The diagram below explains the process of making wood pellets, used to heat building

The flow diagram illustrates how wood

pellets

used to heat buildings are made.

Overall

, the process involves 7 steps and the raw material used is sawdust which is a by-product of

woodworks

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woodwork

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in a Sawmill. The sawdust is converted into

fibers

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fibres

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of uniform size by hammering in a hammer mill and

then

dampened with steam so as to soften and coagulate them. The softened/moist

fibers

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fibres

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are

then

put through the holes of a pellet machine at a high pressure thereby forming

pellets

. These

pellets

are

then

cooled so as to remove the moisture, loose dust

are

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is

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vacuumed off and the

pellets

are packaged into bags with each bag containing a measured 18 kilogram of

pellets

.