Back to results
US 6,645,366 B2Granted
Waste water treatment device
AssigneeSanyo Electric Co., Ltd.
InventorsMasahiro Iseki, Kazuo Ikegami
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSanyo Electric Co., Ltd.
InventorsMasahiro Iseki, Kazuo Ikegami
Estimating the term…
A waste water treatment device is provided in which removal of phosphorus and removal of nitrogen can efficiently be carried out and a decrease in size of the device and a decrease in cost can be achieved. The waste water treatment device includes a waste water treatment chamber; at least one set of electrodes disposed so that at least a part of the electrodes are immersed in waste water in the waste water treatment chamber, at least one of said electrodes dissolving out, by electrolysis, iron ions or aluminum ions for precipitating and removing phosphoric acid ions in waste water; a power source for supplying an electrolytic current to the set of electrodes; a control section for controlling the power source; and a metallic catalyst which is disposed in the vicinity of at least one of the sets of electrodes and which effects a denitrifying reaction with hydrogen in waste water.
A waste water treatment device comprising
A waste water treatment method comprising the steps of:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
By electrolysis: by electrocoagulation
By electrochemical disinfection; by electrooxydation or by electroreduction: by electroreduction
Electrodes comprising a substrate and a coating: catalytic coating
Inorganic compounds: phosphorus compounds
Term ended 30 Oct 2021 (estimated)
(i) Field of the Invention
The present invention relates to a waste water treatment device for waste water containing phosphoric acid, phosphorus compounds, phosphate ions, organic nitrogen, nitrite nitrogen, nitrate nitrogen, nitrate ions, and ammonia.
(ii) Description of the Related Art
FIG. 1 is a construction explanatory view of a waste water treatment device as an embodiment to which the present invention is applied; and
FIG. 2 is a construction explanatory view of a conventional waste water treatment device.
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 1. A waste water treatment device 1 of the present invention is made up from a waste water treatment chamber 4 having a flow inlet (not shown) and a flow outlet (not shown)for waste water, a pair of electrodes 5 and 6 disposed so that at least part of each of them is immersed in waste water in the treatment chamber 4 and which are opposed to each other, a power source 7 for electrifying the electrodes 5 and 6, a control unit 8 for controlling the power source 7, and metallic catalysts 9 and 10 disposed in the vicinity of the respective electrodes 5 and 6. The metallic electrodes 9 and 10 are made of, e.g., an alloy of platinum and copper. Each of the metallic electrodes 9 and 10 is formed into, e.g. a cylindrical shape. Each of the metallic electrodes 9 and 10 is formed into a net for enlarging the contact area with nitrate ions, nitrite ions, or ammonium in waste water. Although the metallic catalysts made of an alloy of platinum and copper in particular for improving the efficiency of a denitrifying reaction are used in this embodiment, other metallic catalysts may be used.
The above-described control unit 8 can control the voltage applied from the power source 7 to the electrodes 5 and 6, and it reverses the polarities of the electrodes 5 and 6 periodically, for example, each day in this embodiment.
Each of the above-described electrodes 5 and 6 is a soluble electrode made of an iron ions and/or aluminum ions generation source such as iron, an iron alloy, aluminum, an aluminum alloy, or an iron-aluminum alloy. If the polarities of the electrodes are not reversed by the control unit 8 in this embodiment, one electrode, for example, the electrode 6 may be an insoluble electrode made of an insoluble metal such as platinum, gold, titanium, or carbon.