The invention discloses a deposition and
biological filter combined water purification
system and a water purification method thereof. The deposition and
biological filter combined water purification
system is characterized in that a deposition
pool is positioned in an biological aerated filter, the deposition
pool is connected with the biological aerated filter in an overflow mode, the bottom of the biological aerated filter is connected with an
aeration device, and a
raw water inlet tube is provided with a dosing device. The water purification method comprises the following steps: 1, mixing
raw water with a coagulant through a
static mixer; 2, flocculating; 3, depositing; and 4, filtering, biologically
processing, and discharging
purified water. In the deposition and
biological filter combined water purification
system, the deposition portion and the biological aerated filter are mutually independent, all phases in the
water processing process do not influence each other, and preset
processing effects of all the phases can be reached under the synergistic effect of deposition,
filtration and organisms, and the discharged
water quality is stable.