| http://www.w3.org/ns/prov#value | - This alkaline filtrate may be concentrated by, e.g., evaporation or other means, and used by itself or in combination with the first caustic solution in the digester to treat the organic materials and re-start the cycle. [0026] According to an aspect of one or more embodiments, wood chips or other pulp-containing organics are reacted with a caustic solution in a reaction vessel.
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