WASTEWATER FILTERING METHOD

• Main Authors: IINUMA HIROFUMI, TAIHICHI MOTOYUKI
• Format: Patent
• Language: English
• Published: 19.02.2002
• Edition: 7
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GRINDING; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POLISHING; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To solve such a problem that wastewater mixed with ground refuse or cut refuse generated by machining such as dicing or the like is treated heretofore by two ways of a flocculation and sedimentation method and a combining filtration and centrifugal separation but the reutilization of filtered water can not be performed in the former because chemicals are mixed with filtered water and a system becomes large in the latter, and initial cost and running cost are high. SOLUTION: A second filter membrane 36 becoming a laminated layer containing Si is formed on a first filter membrane 31 comprising a polymer and wastewater containing refuse of Si or glass is filtered by these filters. External force such as air bubbles or the like for preventing clogging is applied to the second filter membrane 36 to keep filtering capacity. Thereafter, the concentration of the wastewater in a raw water tank can be increased.