Liquid purification or separation – With means to add treating material – Spaced along flow path
Reexamination Certificate
2005-04-12
2005-04-12
Hruskoci, Peter A. (Department: 1724)
Liquid purification or separation
With means to add treating material
Spaced along flow path
C204S269000, C204S275100, C205S743000, C205S745000, C205S755000, C210S096100, C210S205000, C210S748080
Reexamination Certificate
active
06878268
ABSTRACT:
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.
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Hruskoci Peter A.
Jordan and Hamburg LLP
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