MULTIBUBBLE INJECTION TYPE DISSOLVED AIR FLOTATION WATER TREATMENT APPARATUS

摘要

Disclosed herein is a multibubble injection type DAF (Dissolved Air Flotation) water treatment apparatus which supplies fine bubbles injected through injection of saturated water to a lower area of a separation zone as well as a lower area of a contact zone of a flotation basin, thereby improving removal efficiency of flocs.

主权项

1. A multibubble injection type DAF (Dissolved Air Flotation) 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.