Method for water denitrification
AssigneeSUD Chemie MT S.r.l.
InventorsAntonio Pasquale, Carlo Rubini, Michele Rossi, Luigi Cavalli
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Abstract
A method for denitrification of water, in which the water to be denitrified is made to flow over a porous carrier which comprises a transition metal, preferably palladium, used in an amount between 0.01 and 5% by weight on the carrier and on which denitrifying bacterial strains capable of surviving in the presence of hydrogen are made to adhere, and in which hydrogen is used as a reducing agent and the pH of the reaction is adjusted to values of 4.5 to 7.8 preferably by using carbon dioxide.
Claims12
A method for removing nitrates from water containing nitrates as pollutants, comprising a stage in which the water is made to flow over an inert porous carrier which supports a transition metal capable of activating molecular hydrogen, forming metallic hydrides, and on which denitrifying bacteria adhere which can survive in anoxic conditions and in the presence of hydrogen, and wherein hydrogen is used as a reducing agent and is made to react in the stoichiometric quantity required by the denitrification reaction or in a larger quantity, and the pH of the reaction is adjusted to values from 4.5 to 7.8 with carbon dioxide or with acids which provide anions that are commonly present in potable water.
Dependencies are inferred from the claim text.