Coagulant composition for wastewater treatment
AssigneeKemira Oyj
InventorVesa Kettunen
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Abstract
The present invention relates to a coagulant composition comprising a coagulant and a carbon source compound, wherein the coagulant is selected from the group iron and aluminium salts, or any combination thereof. The carbon source includes methanol, ethanol or glycol. The present invention further relates to a method of treating wastewater, e.g. containing nitrogen and/or phosphate, including providing the coagulant composition to wastewater before, during and/or after a biological treatment step, and the use of the coagulant composition in wastewater treatment.
Claims15
A liquid coagulant composition comprising a coagulant and a carbon source compound, wherein the coagulant is selected from the group iron and aluminium salts, or any combination thereof, wherein the iron salt is selected from ferric sulphate, ferric chloride or a combination thereof, the aluminium salt is selected from polyaluminium chloride(s), polyaluminium sulphate(s), aluminium sulphate, or a combination thereof, the carbon source compound is selected from any one of alcohols, organic acids, sugars, molasses and acetates, and any combination thereof, and the carbon source compound is present in said composition in an amount of 0.5-50 wt %.
Dependencies are inferred from the claim text.