APPRATUS AND METHOD FOR FILTRATING OIL-CONTAINING DRAINAGE WATER, AND METHOD AND APPARATUS FOR RESTORING FILTRATION MEMBRANE DEVICE

• Main Authors: SASAJIMA Yasuhiro, KANAI Osamu, TAKIGUCHI Keisuke, YODEN Mitsuru
• Format: Patent
• Language: English; French; German
• Published: 13.10.2021
• Subjects: CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

A filtering apparatus and a filtering method for waste water that contains oil that is compact and that easily prevents the adhesion of solid matters that contains oil is provided. Filtering apparatus 1 for waste water that contains oil has immersed membrane tank 2 to which waste water that contains oil is introduced; filter membrane apparatus 3 that is immersed with the waste water that contains oil that is introduced to immersed membrane tank 2 and that filters the waste water that contains oil; and agitator 8 that is provided in immersed membrane tank 2 and that agitates the waste water that contains oil that is introduced to immersed membrane tank 2. A method for filtering waste water that contains oil has the steps of: introducing waste water that contains oil to immersed membrane tank 2 that houses filter membrane apparatus 3, and immersing filter membrane apparatus 3 with the waste water that contains oil; and filtering the waste water that contains oil by means of filter membrane apparatus 3 while agitator 8 that is provided in immersed membrane tank 2 agitates the waste water that contains oil that is introduced to immersed membrane tank 2.