Method for removing humic substances from an aqueous alkaline solution
A method for removing humic substances comprising lignin, other lignin type compounds and their disintegration products from an aqueous alkaline waste water from a bleaching of chemical pulp, which method comprises -obtaining an aqueous alkaline waste water comprising humic substances such as dissol...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A method for removing humic substances comprising lignin, other lignin type compounds and their disintegration products from an aqueous alkaline waste water from a bleaching of chemical pulp, which method comprises -obtaining an aqueous alkaline waste water comprising humic substances such as dissolved lignin, and -adding a high cationic starch having a charge density value of at least 1.8 meq/g dry matter of starch derivates determined at pH 7-7.5 to the alkaline waste water to precipitate humic substances. |
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