The present invention provides a gas generator, comprising a water tank and an electrolysis device. The water tank has a first hollow portion for containing electrolyzed water. The electrolysis device is disposed inside the first hollow portion of the water tank for electrolyzing the electrolyzed water to generate a hydrogen-oxygen mixed gas. When the electrolysis device starts to electrolyze the electrolyzed water, the first hollow portion of the water tank is filled with the electrolyzed water for standing at a full level of water. And after the electrolysis device electrolyzed the electrolyzed water, the level of water for the electrolyzed water filled into the first hollow portion of the water tank is higher than 95% of the full level of water. The gas generator of the present invention provides the design for saving space and nearly a zero gas chamber to reduce the possibility of explosions resulting from hydrogen-oxygen mixed gas.

An integrated equipment and treatment method for synchronous ecological treatment of domestic sewage and sludge, the equipment includes a one-piece box-shaped main body divided into several tank compartments which includes an anaerobic tank, a sludge reduction and denitrification tank, an aerobic tank, a sedimentation tank, and a disinfection tank, an inlet pipe for sewage and sludge entrance and an outlet pipe for exit of effluent after treatment. The sludge reduction and denitrification tank is equipped with variable microporous aeration pipes, worm fillers and multi-functional water quality online detectors. The aerobic tank is equipped with aeration pipeline components and DO online detectors. The sewage and sludge are guided to passing through the different tank compartments in order for simultaneous sewage treatment and sludge reduction. The removal rate of total nitrogen is as high as 85%, and the simultaneous reduction effect of sludge can reach more than 60%.

A gas diffusion electrode includes a carbon fiber tube, a support layer, and a catalyst layer. The carbon fiber tube is straight and functions as a substrate. The support layer includes a carbon black-polytetrafluoroethylene (PTFE) coating, and is disposed on the substrate. The catalyst layer includes carbon black, anhydrous ethanol, and PTFE, and is disposed on the support layer. The gas diffusion electrode has a diameter of 3-20 mm and a length of 50-500 mm.

A total nitrogen (TN) removal device for sewage and its operation method. The TN removal device includes a denitrification tank, a supplementary reaction zone filled with aerobic granular sludge and a sedimentation and separation zone. The supplementary reaction zone and the sedimentation and separation zone are arranged inside the denitrification tank, and communicated through a three-phase separator. The sedimentation and separation zone is located above the supplementary reaction zone. A top of the sedimentation and separation zone is greater than its bottom. A membrane aerated biofilm reactor (MABR) assembly is arranged in a space formed by outer walls of the sedimentation and separation zone and supplementary reaction zone and an inner chamber of the denitrification tank. A side wall of the denitrification tank is provided with a chemical oxygen demand (COD) detector and a nitrate nitrogen detector.

A system for agricultural irrigation water oxygenation for enriching soil oxygen level comprises a source of compressed oxygen (and not compressed air) coupled to a water line feeding an irrigation system, such as a drip irrigation system. The coupling system may include a pressure sensor for measuring the pressure in the water line, a solenoid safety valve, a control valve, a flow meter and a controller that controls the flow of oxygen from the source of compressed liquid oxygen to the water line using the components of the coupling system, without using a special cavitation valve and using off-the-shelf components while achieving the same benefits as a system incorporating the special cavitation valve.

A method of optimizing a wastewater treatment plant includes: providing an oxidation ditch having a dissolved oxygen set-point and including: an aeration system having an aerobic zone; and an anoxic zone; measuring the oxidation-reduction potential of the anoxic zone; and based on the measured oxidation-reduction potential: increasing or decreasing the dissolved oxygen set-point; increasing or decreasing a dose of supplemental nutrients; and/or increasing a dose of supplemental carbon or metal salts.

This application relates to a system of treating wastewater wherein an oxygen infusion system is used to supersaturate wastewater before aerobic biological processes, wherein oxygen is transferred to the wastewater free of oxygen bubbles and achieves a reduction in power demand for the aeration process of wastewater.

A device for treatment of organic waste includes a heating unit, a hydrolysis tank, a regulating tank, an aerobic fermentation reactor, an organic waste feeder, an aerobe feeder, a delivery mechanism, a deodorization unit, and an air distributor. The hydrolysis tank is connected to the regulating tank, and the regulating tank is connected to the aerobic fermentation reactor. The delivery mechanism is disposed between the regulating tank and the aerobic fermentation reactor. The heating unit is connected to the hydrolysis tank and is configured to heat an organic material in the hydrolysis tank. The organic waste feeder and the aerobe feeder are connected to the regulating tank. The deodorization unit is disposed on and connected to the aerobic fermentation reactor. The air distributor is disposed in the aerobic fermentation reactor and is configured to provide oxygen to the aerobic fermentation reactor.

Apparatuses for removal of solids from water comprising a heater for heating an immiscible liquid (IL), a humidifier having porous sheets allowing direct contact between the IL and water, thereby separating the solids by evaporating the water into cool dry air flowing past the porous sheets, and a dehumidifier comprising porous sheets that allow direct contact between the cool IL and hot moist air flowing past the porous sheets, thereby condensing fresh water from the moist air. Also disclosed are methods for removal of solids from water by heating an IL, distributing the IL to porous sheets in a humidifier, distributing water with dissolved solids to the porous sheets, separating the solids from the water by evaporating the water into dry air flowing past the porous sheets, and condensing fresh water by flowing the moist air past porous sheets in a dehumidifier having cool IL distributed to the porous sheets.

This application relates to an oxygen infusion module for a system and method of treating wastewater wherein an oxygen infusion system is used to supersaturate wastewater before aerobic biological processes, wherein oxygen is transferred to the wastewater free of oxygen bubbles and achieves a reduction in power demand for the aeration process of wastewater.