Abstract: An ozone generation apparatus includes a cylindrical shaped first electrode, a cylindrical shaped second electrode disposed coaxially with the first electrode and disposed in the first electrode, a dielectric disposed between the first electrode and the second electrode. Dry air is supplied between the first electrode and the second electrode as raw material gas. A discharge gap length d formed by the first electrode, the second electrode, and the dielectric is set to be in a range of 0.3 to 0.5 mm. A pd product, which is a product of the discharge gap length d and a gas pressure p of the raw material gas, is in a range of 6 to 16 kPa·cm. And the discharge gap length d and the gas pressure p of the raw material gas are set to satisfy following expression.

Abstract: An apparatus performs radical treatment by electric discharge. The radical treatment apparatus includes an electrode unit having a gas flow path that blows gas onto treatment water and an electrode member that generates the electric discharge at a leading edge in order to generate a radical from the gas.

Abstract: A water treatment control system using a fluorescence analyzer includes an activated carbon injection equipment 4 having an activated carbon injector 4a, a fluorescence analyzer 7 provided on the upstream of the activated carbon injector 4a, and a flowing water flowmeter 6. An activated carbon injection rate necessary to reduce a trihalomethane formation potential is calculated by an activated carbon injection rate calculating apparatus 8 based on a measured value from the fluorescence analyzer 7. An activated carbon injection amount from the activated carbon injector 4a is controlled by an activated carbon injection amount control apparatus 9 based on the activated carbon injection rate and a measured value from the flowing water flowmeter 6.

Abstract: A water treatment control system for minimizing trihalomethane formation includes chlorine injection equipment having a plurality of chlorine injectors (11d, 12, 13), a fluorescence analyzer 7 provided on the upstream of the chlorine injectors, and a water flowmeter 6. An chlorine injection rate necessary to reduce a trihalomethane formation potential is calculated by a chlorine injection rate calculating apparatus 14a based on a measured value from the fluorescence analyzer 7. An chlorine injection amount from the chlorine injectors is controlled by chlorine injection amount control apparatuses 15a–15c based on the chlorine injection rate and a measured value from the flowing water flowmeter 6.

Abstract: An apparatus performs radical treatment by electric discharge. The radical treatment apparatus includes an electrode unit having a gas flow path that blows gas onto treatment water and an electrode member that generates the electric discharge at a leading edge in order to generate a radical from the gas.

Abstract: A UV-assisted advanced-ozonation water treatment system comprises a water treating tank 1, an ozonic water tank 2, an ozonized gas generator 3, and a UV light source 4 disposed in the water treating tank 1 and having a UV-radiating surface 4a, and an ozonic water jetting device including jetting nozzles 5 for jetting the ozonic water onto the UV-radiating surface of the UV light source. An ozonized gas diffusing device 12 is placed in the ozonic water tank 2. An ozonized gas generated by the ozonized gas generator 3 and compressed by a compressor 13 at a pressure in the range of about 2 to about 3 kg/cm2 is diffused into the ozonic water tank 2 by the ozonized gas diffusing device 12. A high-pressure, a high-ozone-concentration ozonic water produced in the ozonized water tank 2 is jetted through the jetting nozzles 5 onto the UV-radiating surface 4a.

Abstract: A UV-assisted advanced-ozonation water treatment system comprises a water treating tank 1, an ozonic water tank 2, an ozonized gas generator 3, and a UV light source 4 disposed in the water treating tank 1 and having a UV-radiating surface 4a, and an ozonic water jetting device including jetting nozzles 5 for jetting the ozonic water onto the UV-radiating surface of the UV light source. An ozonized gas diffusing device 12 is placed in the ozonic water tank 2. An ozonized gas generated by the ozonized gas generator 3 and compressed by a compressor 13 at a pressure in the range of about 2 to about 3 kg/cm2 is diffused into the ozonic water tank 2 by the ozonized gas diffusing device 12. A high-pressure, a high-ozone-concentration ozonic water produced in the ozonized water tank 2 is jetted through the jetting nozzles 5 onto the UV-radiating surface 4a.

Abstract: A water treatment control system using a fluorescence analyzer includes an activated carbon injection equipment 4 having an activated carbon injector 4a, a fluorescence analyzer 7 provided on the upstream of the activated carbon injector 4a, and a flowing water flowmeter 6. An activated carbon injection rate necessary to reduce a trihalomethane formation potential is calculated by an activated carbon injection rate calculating apparatus 8 based on a measured value from the fluorescence analyzer 7. An activated carbon injection amount from the activated carbon injector 4a is controlled by an activated carbon injection amount control apparatus 9 based on the activated carbon injection rate and a measured value from the flowing water flowmeter 6.

Abstract: A water treatment control system using a fluorescence analyzer includes an activated carbon injection equipment 4 having an activated carbon injector 4a, a fluorescence analyzer 7 provided on the upstream of the activated carbon injector 4a, and a flowing water flowmeter 6. An activated carbon injection rate necessary to reduce a trihalomethane formation potential is calculated by an activated carbon injection rate calculating apparatus 8 based on a measured value from the fluorescence analyzer 7. An activated carbon injection amount from the activated carbon injector 4a is controlled by an activated carbon injection amount control apparatus 9 based on the activated carbon injection rate and a measured value from the flowing water flowmeter 6.

Abstract: A water treatment control system using a fluorescence analyzer includes an activated carbon injection equipment 4 having an activated carbon injector 4a, a fluorescence analyzer 7 provided on the upstream of the activated carbon injector 4a, and a flowing water flowmeter 6. An activated carbon injection rate necessary to reduce a trihalomethane formation potential is calculated by an activated carbon injection rate calculating apparatus 8 based on a measured value from the fluorescence analyzer 7. An activated carbon injection amount from the activated carbon injector 4a is controlled by an activated carbon injection amount control apparatus 9 based on the activated carbon injection rate and a measured value from the flowing water flowmeter 6.