What kind of Sawdust? HELP ME!?

I am finalist of Intel Isef. My English is very bad so if there are some mistakes, i'm very sorry! I want to ask what kind of Sawdust could be hydrolyzed easily by bacteria into short chain organic compounds ? which have a lots of cellulose and a little of toxic? What tree thay usually use? Thank you very... show more I am finalist of Intel Isef. My English is very bad so if there are some mistakes, i'm very sorry!
I want to ask what kind of Sawdust could be hydrolyzed easily by bacteria into short chain organic compounds ? which have a lots of cellulose and a little of toxic?
What tree thay usually use?
Thank you very much! Help ME!
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