Black liquor
From Conservapedia - Reading time: 1 min
Black liquor is a byproduct of the paper production process, alkaline spent liquor, that can be used as a source of energy.
Alkaline spent liquor is removed from the digesters in the process of chemically pulping wood. After evaporation, the residual "black" liquor is burned as a fuel in a recovery furnace that permits the recovery of certain basic chemicals.
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