Electrolysis Method, and method and Plant for the Pretreatment of Raw Water
AssigneeF-Tec Systems S.A.
InventorJean-Marie Fresnel
Life of this patent
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Abstract
The invention relates to an electrolysis method that uses iron particles and an aqueous solution containing sodium hypochlorite. The method is characterised in that said method uses direct current, the iron particles form the anode (46) and the sodium hypochlorite concentration of the aqueous solution is at least 1 g/L. The invention further relates to a method and to a plant for the pretreatment of raw water for producing water that can then be easily treated in order to produce drinkable water or a so-called technical water that cannot be consumed but that can be used for household, agricultural or industrial applications such as cleaning, washing, laundry, flushing, garden watering or irrigation.
Claims13
A process for the electrolysis of an aqueous solution, wherein:
- iron particles are introduced into a metallic receptacle (46) contained in a tank equipped with an electrode (47) not touching this metallic receptacle (46);
- an aqueous solution is introduced into said tank so that it at least partially covers the iron particles and is in contact with the electrode (47);
- direct current is supplied to the metallic receptacle (46) and the electrode (47), the metallic receptacle (46) containing iron particles being the anode and the electrode (47) being the cathode;
- characterized in that
- the aqueous solution introduced into the tank is an aqueous solution of sodium hypochlorite, the concentration of which is at least 1 g/l.
A process for pretreating raw water, wherein:
- iron particles are introduced into a metallic receptacle (46) contained in a tank equipped with an electrode (47) not touching this metallic receptacle (46);
- an aqueous solution is introduced into said tank so that it at least partially covers the iron particles and is in contact with the electrode (47);
- direct current is supplied to the metallic receptacle (46) and the electrode (47), the metallic receptacle (46) containing iron particles being the anode and the electrode (47) being the cathode;
- characterized in that
- the aqueous solution introduced into the tank is an aqueous solution of sodium hypochlorite, the concentration of which is at least 1 g/l and in that the product of the electrolysis is extracted from the tank and introduced into the raw water to be pretreated.
A plant for pretreating raw water, comprising:
- an electrolysis device (2) comprising a tank containing a metallic receptacle (46) and an electrode (47) not touching this metallic receptacle (46);
- the outlet (8) of this electrolysis device (2) being located above a flow straightener (4) or connected to the feed pipe (5) of the raw water to be treated, upstream of a biological filter comprising an aerobic filter bed (16) followed by an anaerobic filter bed (17),
- characterized in that
- the electrolysis device (2) is connected to an inlet pipe (35) of aqueous solution of sodium hypochlorite (34).
Dependencies are inferred from the claim text.