ALGAE REMOVING METHOD USING DISSOLVED AIR FLOATATION

摘要

PURPOSE: An algae removing method using dissolved air floatation is provided, which can removes high density flock by an up-rising inclined plate settling device and can remove low density flock and algae by a dissolved air floatation(DAF) process in the winter season. CONSTITUTION: The system comprises the followings: (i) a flow equalizing tank; (ii) a flash mixer; (iii) a cohesion pond(2) that is partitioned by baffle walls(3) and has a coagulator(1) for coagulating impurities in water; (iv) a settling pond(4) that has an effluent weir(5) and an inclined plate settling device(17) at the top; (iv) a floatation tank(A) in which water influent enters through the opening of an underflow wall(6) and mixed with the air saturated water coming from an air saturater(13) and float up along an inlet baffle(7), the floated sludge being removed to a sludge trough(10) by a sludge skimmer(8) and treated water being discharged through a bottom Orifice weir(9); and (v) an air saturation tank(13) in which pressurized water by a pump(14) is saturated with air compressed by a compressor(15) and fed to the bottom of the floatation tank(A).