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Gunns: getting the facts straight ... : Comments
By Alan Ashbarry, published 14/9/2007'Click and send' campaigns encourage ill-informed comment when it comes to the proposed Gunn's pulp mill in Tasmania.
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If it is built, the mill will take woodchips that are currently exported with a value around $150 per bone dry tonne into 500 kilograms of bleached kraft pulp valued at around $350. This addition of value to the fibre will enable the mill owners to create many new jobs and to reduce the current trade deficit from imported pulp and paper products of around $2 billion per annum.
The 500 kg of each tonne of woodchips that does not end up as pulp (mainly lignin) will be burnt to release the solar energy stored by the tree in order to run the mill and to recycle the chemicals used to pulp the wood.
Kraft mills are usually self sufficient in energy and often have a small excess of electricity to contribute to the State power grid. In summary the kraft process effectively runs on solar energy stored in the wood and turns carbon dioxide that a tree has converted into cellulose fibre into a useful and natural polymer, papermaking pulp.
That is why there are so many kraft mills in environmentally conscious countries like Sweden, Finland, Norway and Canada.