Method for cleaning of ceramic membrane filtration system using submerged membrane and pressurized membrane

摘要

The present invention relates to a method for cleaning an immersion membrane filtering unit (100) including a ceramic membrane (201), which comprises the steps of: (a) introducing raw water into an immersion membrane filtering unit (100); (b) performing a membrane filtration treatment for the introduced raw water by a ceramic membrane (201) to generate treated water and sludge; (c) operating a suction filtration pump (401) positioned at a rear end of the immersion membrane filtering unit (100) to discharge treated water generated in the step (b) through a treated water outlet (210) so as to collect the treated water generated in the step (b) in a treated water tank (600); (d) operating a sludge inflow inverter pump (190′) positioned at the other rear end of the immersion membrane filtering unit (100), and introducing the sludge generated in the step (b) into a sludge pressurization membrane filtering unit (900) including another ceramic membrane (940) to be treated with membrane filtration so as to generate a pressurization membrane-treated water and a dehydration sludge; (e) generating a sludge dehydration cake by introducing and dehydrating the dehydration sludge into a dehydrator (800); and (f) introducing the pressurization membrane-treated water generated in the step (d) into a sprinkler pipe (220) of the immersion membrane filtering unit (100) by the sludge inflow inverter pump (190′) to be injected to the ceramic membrane (201) so as to sprinkle the immersion membrane filtering unit (100).