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US 2016/0222587 A1Published application
Use of Fly Ash to Treat Spent Liquor from a Thermomechanical Pulping Process
AssigneeLakehead University
InventorsPedram Fatehi, Farshad Oveissi
Life of this patent
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Abstract
The spent liquor (SL) of a thermomechanical pulping (TMP) process introduces a high load to the wastewater system of this process. To reduce this load, fly ash from a biomass boiler is used for removing lignin from the SL, and also for decreasing the chemical oxidation demand (COD) and turbidity of the SL.
Claims21
A method of treating spent liquor from a pulping process of a pulp mill, the method comprising applying fly ash to the spent liquor.
Use of fly ash to treat spent liquor from a pulping process.
Dependencies are inferred from the claim text.