First, burn the wood to produce charcoal, then macerate the charcoal.
Then, put it into an Industrial Electrolyzer with empty cells to create carbon, which you then use an Electric Crafting Table to craft with hydrogen and make methane.
Then you throw the cells into a Liquid Transposer to get that methane dumped into pipe/ducts/whatever, and pipe that methane into a Railcraft Steam Boiler. (Maximum size, and note that Boilers will require a LOT of fuel to get heated up to maximum efficiency)
You then send the steam produced in this manner through Industrial Steam Engines (or Commercial or Hobbyist's, but Industrial would be the best use of your iron) to produce a LOT of MJ, which you then use conduits to distribute across an array of Magma Crucibles filled with cobblestone.
And then, finally, send the lava produced in this manner through a Thermal Generator, and you will get a staggering 486,000 EU per block of wood.
Though, obviously, with a lot of up-front cost for the proper processing facilities. Happy mining!
@ the above spoiler; Oh god, lol...
That's a horrible way to make EU. With a 3x3x4 High-pressure steam boiler (3x3x5 including firebox) you could run the steam through 8 pipes into 2 steam turbines for 100 EU/t (50 EU/t Each) instead of into steam engines.
Possibly even more. I didn't test any higher than 2 turbines.
Also, steam turbines and boilers look more epic than interconnecting your weird-ass circuit of machines from different mods.
If you're gonna put in a TE Magma Crucible, you might as well use magmatic engines in a circuit with just the crucible and the geothermal generator(s). In either case, you're using netherrack as the fuel for EU, not the single tree.