Process for removing ammonia from waste waters
AssigneeSociete Nationale Elf Aquitaine
InventorsPatrick Horny, Alain Ladousse
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Abstract
A method for removing ammonia, or ammonia and phosphates from industrial agricultural or household effluents by causing precipitation as magnesium ammonium phosphate by means of a liquid reagent containing magnesium and phosphate ions and an acid. The effluents have more than 1 gle of ammoniacal nitrogen and the pH is adjusted to between 9 and 11 after addition of the liquid reagent.
Claims15
A process for removing ammoniacal nitrogen contained in waste waters having more than 1 g/l of nitrogen in the ammoniacal form by precipitation in the form of a magnesium ammonium phosphate, comprising the addition to the waste waters of a single liquid reactant containing sources of magnesium ions, phosphate ions and an acid, and then adjusting the pH to a value of between 9 and 11.
A process for treating waste waters including the addition to waste waters containing more than 1 g/l of ammoniacal nitrogen, and phosphate, of a single liquid reactant comprising magnesium ions, phosphate ions, and an acid, and then adjusting the pH of the waste waters to a value of between 9 and 11.
Dependencies are inferred from the claim text.