Abstract: The present disclosure provides a physicochemical water treatment process using a microfiber filter coated with a coagulant, including: a) performing a pressurized filtration by supplying raw water to an upper portion of a pressurized microfiber filtering device including a microfiber filter coated with a coagulant; b) backwashing the microfiber filter by supplying backwashing water and air from a lower portion of the microfiber filtering device; and c) after the backwashing of the microfiber filter is completed, coating the microfiber filter with the coagulant by supplying the coagulant together with the backwashing water, wherein backwashing wastewater of the pressurized microfiber filtering device is concentrated by the suction type microfiber filter coated with the coagulant and transferred to a dehydrator.

Abstract: The present invention provides a spanner box including a main shaft (3) which has a cylindrical shape, a screw thread (3-2) is formed in a central region of an outer side surface, a side surface is cut from the central region, a second spring groove (3-3) is formed in a bottom surface of the bolt head protrusion latch movement groove (3-4), and one end portion of an elastic part (4) is disposed in the second spring groove (3-3), first bolt head protrusion latches (1) each of which having a thickness suitable for being insertable into the main shaft coupling bolt tab (3-5), an irregularity (1-1) is formed in a bottom surface of a lower end portion, a spring groove (1-4) is formed at one side of a bottom surface of an upper end portion, and a movement groove (1-2) is formed at a center of a side surface.

Abstract: Provided are a sewage treatment system using a multistage long-fiber filtering device, and a treatment method thereof. The sewage treatment system uses at least one pressurized long-fiber filtering device and at least one submerged-type long-fiber filtering device to treat sewage by a direct filtration method. The pressurized long-fiber filtering device treats sewage by direct filtration, and the submerged-type long-fiber filtering device treats the sewage by concentrating backwashing water of filtered sewage and dehydrating and disposing of the backwashing water. The pressurized long-fiber filtering devices and the submerged-type long-fiber filtering devices are respectively provided in a modular including a plurality of the devices in a symmetrical structure to each other. Accordingly, as sewage is treated by direct filtration by using the pressurized long-fiber filtering device and the submerged-type long-fiber filtering device, greenhouse gases may be reduced without microbial treatment.

Abstract: A variable pore micro filter (VPMF) capable of side stream filtration and cross flow filtration is disclosed. The VPMF includes a cylindrical pressure vessel, an upper plate flange to which an original water inflow tube is connected, a lower plate flange to which a process water discharging tube is connected, a latitudinal thread filtering unit whose lower portion is installed on the lower plate flange and whose upper portion is fixed on a movable upper holder on which throughholes are formed, the filtering unit having flexible latitudinal thread filters forming a filter layer, a process water collection vessel for collecting and guiding the process water filtered through the filter layer, an enriched water discharging unit for discharging the enriched water, and a pressurized air inflow unit for injecting pressurized air in order to counter-clean the contaminated thread filter.

Abstract: A permanent fluid filtering system includes a cylindrical body having an upper end, to which an inlet tube is connected, and a lower end, to which an outlet tube is connected, and a latitude thread filter assembly disposed within the cylindrical body. The latitude thread assembly is compressible and expandable in accordance with a fluid flowing direction, thereby varying a porous structure of the filter assembly. The permanent fluid filtering system further includes a fluid flow stabilizing plate for stabilizing the flow of dirty fluid fed inside the body through the inlet tube.