The present disclosure discloses an NOI water bath apparatus, which includes an NOI generator, a GLM and a GLS, where the NOI generator includes an ionization module, and the ionization module is configured to ionize oxygen into NOIs; an air inlet end of the GLM is connected to an air outlet end of the NOI generator, the GLM includes a gas-liquid mixing module, and the gas-liquid mixing module is configured to dissolve the NOIs generated by the ionization module; a liquid inlet end of the GLS is connected to a liquid outlet end of the GLM, the GLS includes a first filtering module, and the first filtering module is configured to filter out exhaust gas in the gas-liquid mixing module.

A system and method for treatment of a wastewater fluid is described. The system includes a gas supply system to provide a process gas into the wastewater fluid, a pulsed electrical-power generator to generate high electrical voltage pulses and a reactor apparatus pneumatically coupled to the gas supply system, and electrically coupled to the pulsed electrical-power generator. The reactor apparatus is configured to produce a plurality of gas microbubbles of the process gas injected into the wastewater fluid supplied into the reactor apparatus for the treatment, and to apply the high electrical voltage pulses generated by the pulsed electrical-power generator to said plurality of the microbubbles. The high electrical voltage pulses have energy sufficient to create a plasma glow discharge within the plurality of the microbubbles, and in an interface of the microbubbles with the wastewater fluid.

A plasma generating method, used in a plasma generating apparatus which includes a container, a first electrode, and a second electrode, includes: supplying a liquid in the container so that the second electrode is in contact with the liquid; in a first period, generating first plasma in a bubble generated in the liquid by applying a first voltage between the first electrode and the second electrode; supplying a first gas in the liquid in a second period after the first period; and generating second plasma in the first gas by applying a second voltage between the first electrode and the second electrode. In generating the first plasma, the first gas is not supplied in the liquid. The bubble contains a second gas.

The present invention relates to a bio-electrochemical system (BES) and a method of in-situ production and removal of H.sub.2O.sub.2 using such a bio-electrochemical system (BES). Further, the invention relates to a method for in-situ control of H .sub.2O.sub.2 content in an aqueous system of advanced oxidation processes (AOPs) involving in-situ generation of hydroxyl radical (OH) by using such a bio-electrochemical system (BES) and to a method for treatment of wastewater and water disinfection. The bio-electrochemical system (BES) according to the invention comprises:—an aqueous cathode compartment comprising a first cathode and a second cathode,—an aqueous anode compartment comprising an anode at least partly covered in biofilm, wherein the first cathode is connected to a first circuit and the second cathode is connected to a second circuit, wherein the first and the second circuit are connected to the system by an external switch.

A fluid treatment device includes a pipe including an inlet, an outlet, an internal space through which a fluid moves and including a light source part disposed in the internal space and providing a light to the fluid. The light source part includes at least one light source unit having a substrate and a plurality of light sources disposed on the substrate and emitting the light. A ratio of a first distance between two light sources adjacent to each other to a second distance between each light source and an inner circumferential surface of the pipe is 1:1.25 or less when viewed in a longitudinal-section.

A process for decontaminating a contaminated aqueous liquid comprising methyl-tert-butyl ether (MTBE) involving pretreating the contaminated aqueous liquid with chlorine and/or a hypochlorous acid salt and irradiating the aqueous liquid with an ultraviolet wavelength to produce a radical molecular species that degrades the MTBE. MTBE is degraded into at least one degradation byproduct including tert-butyl formate (TBF), tert-butyl alcohol (TBA), acetone, carbon dioxide, and water.

An electrochemical device for purifying a fluid, for example wastewater or sludge, includes an electrochemical filtering membrane, including a metallic support, for example chosen from a screen, a fabric or an open-pore foam, the support being permeable to the fluid, a coating layer of the support including a titanium oxide of general formula TiOx, with x between 1.5 and 1.9.

The application belongs to the technical field of water treatment, and relates to a biofilm electrochemical reactor for simultaneously removing nitrate nitrogen and trace organic matters in water. According to the principles of electrochemical reaction and products completely different under different cathode and anode material conditions, the reactor is divided into three functional regions, wherein first, an electrochemical reaction of producing hydrogen at a cathode and decomposing carbon at an anode is realized in a first functional region so as to provide a condition for reduction of nitrate nitrogen by a hydrogen autotrophic denitrifying bacteria of a particle electrode layer in a second functional region, after products generated by means of the electrochemical reaction and a biochemical reaction in the previous two functional regions enter a third functional region, pollutants such as trace organic components and residual ammonia nitrogen in water are oxidized and decomposed by using anodic oxidation function.

Disclosed is a system for preventing scaling and deposit formation in a sterile air heat exchanger of a system for aseptic packaging within laminated carton packages, and a process for eliminating hydrogen peroxide residues in aseptic laminated carton packaging systems, characterized in that it comprises providing a supply of water for scrubbing sterile air that has the following properties: (a) maximum conductivity at 20° C. of 2.0 micromhos; and (b) a maximum silica content of 0.1 ppm.

An emergency treatment device for algal blooms in reservoir tributaries and bays includes a hull, an automatic detection unit provided on the hull, an algae collection-separation unit, an ultrasonic algae removal unit, a micro-current electrolytic algae suppression unit, an algaecide adding unit, a power unit and a control unit. The automatic detection unit, the algae collection-separation unit, the ultrasonic algae removal unit, the micro-current electrolytic algae suppression unit, the algaecide adding unit and the power unit are connected with the control unit. The algae collection-separation unit is used for suction and ex-situ treatment of high-density algae on a surface of the water body. The ultrasonic algae removal unit, the micro-current electrolytic algae suppression unit and the algaecide adding unit are used for in-situ treatment of algae in the water body.