| Title | Leaching phosphorous from the lime mud of kraft pulp mills: Towards sustainability |
|---|---|
| ID_Doc | 24312 |
| Authors | Mousavi, MS; DeMartini, N |
| Title | Leaching phosphorous from the lime mud of kraft pulp mills: Towards sustainability |
| Year | 2024 |
| Published | |
| Abstract | The optimum conditions needed to separate phosphorus from the lime mud generated in kraft pulp mills were identified using different leaching solutions including carbonate, bicarbonate, and green liquor under variety of conditions. Carbonate ions seemed to be the active ion in the phosphorus leaching process. Bicarbonate solution seems to be the most effective leaching agent by removing 84% of phosphorus under the optimum operating conditions of 95 degrees C, 2.92 m, and solution-to- mud mass ratio of 3.6. The shrinking core model was used to determine the leaching mechanism and it showed that the leaching process is controlled by a mix of chemical reaction and diffusion through the particle. Two empirical models were developed to predict the leaching efficiency as a function of carbonate concentration and temperature. Counter-current leaching was shown to be beneficial in increasing the leaching efficiency with the carbonate solutions. Removal of phosphorus from lime mud waste of pulp and paper mills by leaching with different leaching solutions at different temperatures to find the optimum conditions. image |
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