Multibubble injection type dissolved air flotation water treatment apparatus

A multibubble injection type DAF water treatment apparatus for removing suspended particles contained in feed water to be treated, the DAF water treatment apparatus comprising:

• a mixing and coagulation basin configured to stir a coagulant and feed water when the coagulant is injected into the feed water so as to form and grow up flocs through coagulation of suspended particles;
• a flotation basin configured to inject micro bubbles and make the micro bubbles contact with the flocs contained in the feed water to form a combined body, raise the combined body to the surface of water and remove the combined body;
• and
• micro bubble distributing means having one or more nozzles configured to receive saturated water, in which air is saturated, through a saturated water supply pipe in order to spray the saturated water into the flotation basin,
• wherein the flotation basin is divided into a contact zone, in which the injected micro bubbles and the flocs come into contact with each other, and a separation zone, which removes the combined body rising to the surface of water and discharges treated water to a rear end, by a partition upwardly extending from a bottom surface of the flotation basin, and
• wherein the micro bubbles injected through the micro bubble distributing means are supplied to the contact zone and the separation zone,
• wherein the micro bubble distributing means includes a container disposed on the bottom of the flotation basin,
• wherein an upper face of the container forms at least a part of the bottom face of the flotation basin and is partitioned into a face exposed toward the contact zone and a face exposed toward the separation zone, and
• wherein the container has a plurality of second communication holes formed on the upper face thereof, so that the micro bubbles injected from the nozzle mounted at the lower part of the container are supplied to the contact zone and the separation zone through the second communication holes.

A multibubble injection type DAF water treatment apparatus for removing suspended particles contained in feed water to be treated, the DAF water treatment apparatus comprising:

• a mixing and coagulation basin configured to stir a coagulant and feed water when the coagulant is injected into the feed water so as to form and grow up flocs through coagulation of suspended particles;
• a flotation basin configured to inject micro bubbles and make the micro bubbles contact with the flocs contained in the feed water to form a combined body, raise the combined body to the surface of water and remove the combined body;
• and
• micro bubble distributing means having one or more nozzles configured to receive saturated water, in which air is saturated, through a saturated water supply pipe in order to spray the saturated water into the flotation basin,
• wherein the flotation basin is divided into a contact zone, in which the injected micro bubbles and the flocs come into contact with each other, and a separation zone, which removes the combined body rising to the surface of water and discharges treated water to a rear end, by a partition upwardly extending from a bottom surface of the flotation basin, and
• wherein the micro bubbles injected through the micro bubble distributing means are supplied to the contact zone and the separation zone,
• wherein the mixing and coagulation basin comprises:
• a first mixing and coagulation part which is filled with first turbulence derivatives to generate high speed turbulence to first form flocs in the raw water;
• and
• a second mixing and coagulation part which is filled with second turbulence derivatives to generate turbulence slower than the turbulence of the first mixing and coagulation part so as to grow up the flocs in the raw water passing the first mixing and coagulation part.

A multibubble injection type DAF water treatment apparatus for removing suspended particles contained in feed water to be treating, the DAF water treatment apparatus comprising:

• a mixing and coagulation basin configured to stir a coagulant and feed water when the coagulant is injected into the feed water so as to form and grow up flocs through coagulation of suspended particles;
• a flotation basin configured to inject micro bubbles and make the micro bubbles contact with the flocs contained in the feed water to form a combined body, raise the combined body to the surface of water and remove the combined body;
• micro bubble distributing means having one or more nozzles configured to receive saturated water, in which air is saturated, through a saturated water supply pipe in order to spray the saturated water into the flotation basin,
• wherein the flotation basin is divided into a contact zone, in which the injected micro bubbles and the flocs come into contact with each other, and a separation zone, which removes the combined body rising to the surface of water and discharges treated water to a rear end, by a partition upwardly extending from a bottom surface of the flotation basin, and
• wherein the micro bubbles injected through the micro bubble distributing means are supplied to the contact zone and the separation zone, and
• a micro bubble forming part configured to form saturated water using some of the feed water at the upstream side of the mixing and coagulation basin and to supply the saturated water to the nozzle through the saturated water supply pipe.