Abstract: A plasma electrode module, an underwater plasma discharge device including the plasma electrode module, and a water treatment system are provided. The plasma electrode module includes a conductive substrate including a plurality of holes, a ceramic layer surrounding a portion of the outer surface of the conductive substrate, and a plasma electrode disposed in each of the plurality of holes, wherein the plasma electrode has a multilayer structure in which a cylindrical ground portion, a fixed portion, and a discharge portion are sequentially stacked, the ground portion is in contact with the conductive substrate and plasma is generated on the discharge portion, and each of the plurality of holes has a diameter in a range of 1 mm to 10 mm.

Abstract: A complementary thin film transistor (TFT) includes a substrate and a first TFT and a second TFT disposed on the substrate, wherein a first conductive semiconductor layer of the first TFT and a second gate electrode layer of the second TFT are disposed in the same layer and include the same material.

Abstract: A reverse osmosis system for a seawater desalination system is provided.

Abstract: A reverse osmosis apparatus for a seawater desalination system is provided. The reverse osmosis apparatus includes a barrel in which a plurality of vessels receiving reverse osmosis membrane units are arranged, a feed tank provided in an intermediate portion of the barrel and connected to a seawater inlet, a first water tank provided inside a first end portion of the barrel and connected to a plurality of first vessels connected to a first side of the feed tank, and a second water tank provided inside a second end portion of the barrel and connected to a plurality of second vessels connected to a second side of the feed tank.

Abstract: A membrane separation pretreatment apparatus including a membrane separation unit and a first underwater plasma discharge unit disposed in front of the membrane separation unit is provided. The membrane separation pretreatment apparatus includes a membrane separation unit configured to remove particulate matter contained in raw water, and a first underwater plasma discharge unit disposed in front of the membrane separation unit and configured to cause a portion of the raw water to be introduced into the membrane separation unit to perform underwater plasma discharging.

Abstract: A reverse osmosis apparatus for a seawater desalination system is provided.

Abstract: A water treatment apparatus including an underwater plasma discharge module is provided. The water treatment apparatus includes a dissolved air flotation device configured to remove foreign matter contained in water and an underwater plasma discharge module disposed at a preceding stage of the dissolved air flotation device and configured to cause a portion of the water to be introduced into the dissolved air flotation device to perform underwater plasma discharging, wherein the dissolved air flotation device comprises a mixing and coagulation basin configured to coagulate or flocculate the foreign matter contained in the water to form and grow flocs of the foreign matter, and a flotation basin configured to raise and remove the flocs by supplying microbubbles to the water passing through the mixing and coagulation basin.

Abstract: A nonpowered mixing and coagulation basin is provided, which generates turbulences of at least two kinds inside the mixing and coagulation basin to which the raw water flows so that foreign matters contained in the raw water come into contact with each other while circulating by a water flow to be coagulated into a predetermined size, and a dissolved air floatation device using the same. The nonpowered mixing and coagulation basin has multiple stages with different packing materials and packing densities to form turbulent flows inside the raw water and control a flow speed, thereby uniformly mixing raw water and coagulant to enhance coagulation efficiency. The nonpowered mixing and coagulation basin simultaneously carries out mixing and coagulation at the front end part of the water treatment system, reduces equipment expenses by having no electric motor and agitator, and reduces power consumption because it does not use any power unit.

Abstract: A plasma electrode module, an underwater plasma discharge device including the plasma electrode module, and a water treatment system are provided. The plasma electrode module includes a conductive substrate including a plurality of holes, a ceramic layer surrounding a portion of the outer surface of the conductive substrate, and a plasma electrode disposed in each of the plurality of holes, wherein the plasma electrode has a multilayer structure in which a cylindrical ground portion, a fixed portion, and a discharge portion are sequentially stacked, the ground portion is in contact with the conductive substrate and plasma is generated on the discharge portion, and each of the plurality of holes has a diameter in a range of 1 mm to 10 mm.

Abstract: A membrane separation pretreatment apparatus including a membrane separation unit and a first underwater plasma discharge unit disposed in front of the membrane separation unit is provided. The membrane separation pretreatment apparatus includes a membrane separation unit configured to remove particulate matter contained in raw water, and a first underwater plasma discharge unit disposed in front of the membrane separation unit and configured to cause a portion of the raw water to be introduced into the membrane separation unit to perform underwater plasma discharging.

Abstract: A reverse osmosis apparatus for a seawater desalination system is provided.

Abstract: A reverse osmosis apparatus for a seawater desalination system is provided. The reverse osmosis apparatus includes a barrel in which a plurality of vessels receiving reverse osmosis membrane units are arranged, a feed tank provided in an intermediate portion of the barrel and connected to a seawater inlet, a first water tank provided inside a first end portion of the barrel and connected to a plurality of first vessels connected to a first side of the feed tank, and a second water tank provided inside a second end portion of the barrel and connected to a plurality of second vessels connected to a second side of the feed tank.

Abstract: A reverse osmosis system for a seawater desalination system is provided.

Abstract: Disclosed are a water treatment apparatus using underwater plasma discharge and a water treatment system using the same. The apparatus includes a reactor having an inlet through which raw water flows in and an outlet through which purified water flows out, a ground electrode provided at a first side of the reactor, and a plasma electrode module provided at a second side of the reactor and configured to generate plasma. With plasma generated through underwater discharge, it is possible to decompose or remove organic substances and microorganisms present in raw water.

Abstract: A water treatment apparatus including an underwater plasma discharge module is provided. The water treatment apparatus includes a dissolved air flotation device configured to remove foreign matter contained in water and an underwater plasma discharge module disposed at a preceding stage of the dissolved air flotation device and configured to cause a portion of the water to be introduced into the dissolved air flotation device to perform underwater plasma discharging, wherein the dissolved air flotation device comprises a mixing and coagulation basin configured to coagulate or flocculate the foreign matter contained in the water to form and grow flocs of the foreign matter, and a flotation basin configured to raise and remove the flocs by supplying microbubbles to the water passing through the mixing and coagulation basin.

Abstract: A nonpowered mixing and coagulation basin is provided, which generates turbulences of at least two kinds inside the mixing and coagulation basin to which the raw water flows so that foreign matters contained in the raw water come into contact with each other while circulating by a water flow to be coagulated into a predetermined size, and a dissolved air floatation device using the same. The nonpowered mixing and coagulation basin has multiple stages with different packing materials and packing densities to form turbulent flows inside the raw water and control a flow speed, thereby uniformly mixing raw water and coagulant to enhance coagulation efficiency. The nonpowered mixing and coagulation basin simultaneously carries out mixing and coagulation at the front end part of the water treatment system, reduces equipment expenses by having no electric motor and agitator, and reduces power consumption because it does not use any power unit.

Abstract: A nonpowered mixing and coagulation basin is provided, which generates turbulences of at least two kinds inside the mixing and coagulation basin to which the raw water flows so that foreign matters contained in the raw water come into contact with each other while circulating by a water flow to be coagulated into a predetermined size, and a dissolved air floatation device using the same. The nonpowered mixing and coagulation basin has multiple stages with different packing materials and packing densities to form turbulent flows inside the raw water and control a flow speed, thereby uniformly mixing raw water and coagulant to enhance coagulation efficiency. The nonpowered mixing and coagulation basin simultaneously carries out mixing and coagulation at the front end part of the water treatment system, reduces equipment expenses by having no electric motor and agitator, and reduces power consumption because it does not use any power unit.

Abstract: Disclosed are a water treatment apparatus using underwater plasma discharge and a water treatment system using the same. The apparatus includes a reactor having an inlet through which raw water flows in and an outlet through which purified water flows out, a ground electrode provided at a first side of the reactor, and a plasma electrode module provided at a second side of the reactor and configured to generate plasma. With plasma generated through underwater discharge, it is possible to decompose or remove organic substances and microorganisms present in raw water.

Abstract: Disclosed herein is a multibubble injection type DAF (Dissolved Air Flotation) water treatment apparatus which supplies fine bubbles injected through injection of saturated water to a lower area of a separation zone as well as a lower area of a contact zone of a flotation basin, thereby improving removal efficiency of flocs.

Abstract: A nozzle for a dissolved air flotation system includes a housing, a nozzle connector, and a nozzle body. The housing has an inlet formed at one side and an outlet formed at another side. The nozzle connector couples to the inlet and has an inflow path formed in a longitudinal direction. The nozzle body is disposed in the housing, and includes: a collision portion formed at a first end portion of the nozzle body such that a fluid introduced along the inflow path of the nozzle connector 10 changes its flow direction and collides with an inner wall of a side portion of the housing, a plurality of faces formed at sides of the nozzle body, a plurality of side paths defined between the faces and the inner wall of the housing, and a spurt hole defined at a second end portion of the nozzle body.