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Saw Dust / Paddy Husk
Saw Dust
Saw Dust is a typical by-product of wood processing or manufacture, and can have either a high moisture content or a low moisture content depending on its source. Although sawdust has a low energy content, it has a large surface area to volume ratio so can be suitable for blowing into some combustion or gasification systems.
Dry sawdust is particularly suitable for processing into pellets. A rich alternate source for saw dust would be the use of agro waste materials such as paddy husks.
Paddy Husk
Rice milling generates a by product know as husk. This surrounds the paddy grain. During milling of paddy about 78% of weight is received as rice, broken rice and bran. Rest 22% of the weight of paddy is received as husk. This husk is used as fuel in the rice mills to generate steam for the parboiling process.
This husk contains about 75 % organic volatile matter and the balance 25 % of the weight of this husk is converted into ash during the firing process , is known as rice husk ash ( RHA ). This RHA in turn contains around 85 % - 90 % amorphous silica.