Back to results
US 2002/0162801 A1Published application
Method and apparatus for clarification of water
OwnerYoshiyuki Sawadainventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerYoshiyuki Sawadainventor
Estimating the term…
Provided are an apparatus and a method for purification of water in which impurities in contaminated water can be removed with a reduced amount of flocculant and with high efficiency. The apparatus comprises, in the order from the side where contaminated water is introduced, an electrolysis tank (1) for electrolyzing the contaminated water, a gas mixing tank (2) for mixing carbon dioxide into the contaminated water electrolyzed, a coagulation tank (3) for mixing Fe3+ supplied from a flocculant producing device (7) to coagulate impurities in the contaminated water, and a floatation tank (4) for floating and separating the impurities coagulated. The electrolysis tank (1) electrolyzes the contaminated water to lower zeta potential of colloid particles in the contaminated water, and then the contaminated water is mixed with Fe3+ in the coagulation tank (3), thereby reducing the amount of positively charged Fe3+ to be added for neutralizing the colloid particles.
(Amended) An apparatus for purification of water which coagulates and separates impurities in contaminated water by a counter ion effect of a flocculant, comprising an electrolysis tank for electrolyzing the contaminated water and a gas mixing tank for mixing carbon dioxide into the contaminated water, said electrolysis tank being provided before or after a coagulation tank which enables contact between the contaminated water and the flocculant.
(Amended) An apparatus for purification of water which coagulates and separates impurities in contaminated water by a counter ion effect of a flocculant, comprising an electrolysis tank for electrolyzing the contaminated water, said electrolysis tank being provided before or after a coagulation tank which enables contact between the contaminated water and the flocculant, wherein ferric ions are used as the flocculant.
(Cancelled)
(Amended) A method for purification of water for coagulating and separating impurities in contaminated water by a counter ion effect of a flocculant, wherein the contaminated water is electrolyzed and mixed with carbon dioxide, and then the flocculant is added to the resultant contaminated water.
(Amended) A method for purification of water for coagulating and separating impurities in contaminated water by a counter ion effect of a flocculent, wherein the contaminated water is mixed with carbon dioxide, the flocculant is added to the contaminated water, and then the resultant contaminated water is electrolyzed.
(Added) A method for purification of water for coagulating and separating impurities in contaminated water by a counter ion effect of a flocculant, wherein, after the contaminated water is electrolyzed, ferric ions are added to the resultant contaminated water as the flocculent.
(Added) A method for purification of water for coagulating and separating impurities in contaminated water by a counter ion effect of a flocculant, wherein, after ferric ions are added to the contaminated water as the flocculant, the resultant contaminated water is electrolyzed.
Dependencies are inferred from the claim text.