pulp waste liquor

Synonyms

black liquor, , liquor pulping

Definition

Pulp waste liquor is a by-product of the paper and cardboard industry emitted from paper mills.

The liquid effluent from the digestion of wood during pulping; contains wood chemicals (for example, lignin) and spent digestant (caustic, sulfite, or sulfate, depending on the process used). It is used as an energy source to feed back into pulp production. (Wikipedia)

Broader terms

industrial waste

Narrower terms

black liquor