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Making biofuels from the papermaking industry's black liquor waste

Sometimes, people just need to make the best with what they have got to work with. This is what paper mills are trying to do by burning the "black liquor" waste which is a leftover remnant of chemicals and the lignin. As part of the Kraft process (.pdf link), the leftovers are burned to create steam which turns large generators, which in turn provide electricity for the plant. In fact, enough electricity is generated that they can feed some back into the grid. This Kraft process is used for about 80% of all paper made. But what if there was a ... Read more →

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