Physicochemical water treatment process using microfiber filter coated with coagulant

A physicochemical water treatment process using a microfiber filter coated with a coagulant, the process comprising:

• 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 the pressurized microfiber filtering device includes:
• a pressurized housing having an upper portion connected to a raw water supply port;
• the microfiber filter provided inside the pressurized housing to filter the raw water and having an upper end portion fixed to a flow holder;
• a porous permeable pipe disposed in a lower portion of an inside of the microfiber filter to pass filtered treatment water, backwashing water, and air;
• a filtered water and backwashing water distribution port connected to a lower portion of the porous permeable pipe to discharge filtered water and supplying the backwashing water;
• and
• an air supply pipe connected to the lower portion of the porous permeable pipe to supply air,
• treatment water that has been subjected to a pressurized filtration processing is transferred to a treatment water storage tank, and some of the treatment water is transferred to a backwashing water storing bath to be used as backwashing water,
• backwashing wastewater resulted from the backwashing of the microfiber filter is transferred to a suction type filtration tank, and the backwashing wastewater stored in the suction type filtration tank is supplied to a suction type microfiber filtering device to be filtered, and
• suction-filtered treatment water is returned to a raw water storing bath, and some of the suction-filtered treatment water is transferred to a suction type microfiber filtering device backwashing water storing bath.