Method for injection of ozone in ceramic membrane filtration process using submerged membrane and pressurized membrane

摘要

The present invention relates to a method for injecting ozone to treated water generated in 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 collect the treated water generated in the step (b) in a treated water tank (600); (d) operating a sludge inflow 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) flowing the treated water collected in the treated water tank (600) in the step (c) to a UVA lamp unit (990) to be sterilized by ultraviolet rays, and circulating the same with ozone generated in the sterilization process to the treated water tank (600) again.