spent liquor

spent liquor

[′spent ′lik·ər]
(materials)
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).
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References in periodicals archive ?
Leaching and Residue RemovalLeaching takes place in a single stage leach tank which receives solids from the sulphating kiln, spent liquor and make up water.
The lithium carbonate slurry from the second crystalliser reports to the lithium thickener where the lithium carbonate crystals are allowed to settle to allow separation from the spent liquor.
We continue to be committed to spent liquor gasification at Trenton and are working with TRI to gain even more steam production and energy savings.
The recovered sodium carbonate is mixed with water to produce a cooking liquor The project meets the total spent liquor requirements of the mill, and supplies cooking liquor and process steam back to the mill to support the pulp and paper making operation.
About 40 - 50,000 tonnes of spent liquor is produced from the industry's pre--treatment plants every year.
TIP 0607-23 "Viscosity of a neutral sulfite spent liquor (Ostwald capillary viscometer)"
Topics addressed include small community integrated water resources supply and recycling, recycling and reuse of high purity water from semiconductor integrated circuits manufacturing processes, cleaner production by using electrodialysis in organic or aqueous-organic systems, recovery and recycling of waste acids from industrial spent liquors using diffusion dialysis with new series of anion exchange membranes, improving resource cascading, environmental impacts of oil shale and coal electricity, strategies for reducing carbon dioxide emissions in rural communities of Botswana, the impact of economic incentives on recycling behavior, ulta-compact biofilm reactors for wastewater treatment and recovery, and decision support systems for material recovery and energy production.
It also includes a discussion of recovery of pulping spent liquors and regeneration of chemicals used, the manufacture of side products, and on-site manufacture and handling of bleaching chemicals.