Systems, devices, and methods are presented for optimizing the formation of gas nanobubbles in a disinfecting solution. In an example system for treating contaminated water, a centrifugal pump draws the water from a reservoir and circulates the water in and through a circuit of elements including a mixing chamber in the pump, a pressure vessel, a backflow valve, a Venturi injector, and a pair of nozzles immersed in the reservoir. The system injects ozone-rich gas into the fluid to produce an aqueous solution containing a volume of gas nanobubbles. The nozzles release the gas nanobubbles into the reservoir, creating highly reactive compounds that destroy organic compounds and other contaminants in the water.

A system for producing a liquid with gas bubbles. The system has an eductor to mix a liquid stream and a gas stream to a form of a liquid-gas mixture and a mixing column with a stack of filling layers to reduce a size of gas bubbles within the liquid-gas mixture. The stack of filling layers has a plurality of porous layers separated alternately by plate layers and ring layers.

A gas infuser includes a mixing chamber and a liquid injector. Gas is supplied into the mixing chamber and liquid flows through openings of the injector to mix with the gas in the mixing chamber and form a gas-infused liquid.

A system for separating a volatile hydrocarbon from a water stream includes a lead mixer-injector device that receives an untreated water stream including a volatile hydrocarbon, injects compressed air into the untreated water stream and mixes the injected air with the untreated water stream to form a first injected fluid stream. A shear mixing device receives the first injected fluid stream from the mixer-injector device and shear gas bubbles within the received first injected fluid stream so that a frothed stream is formed. A lead degas separator receives and separates the frothed stream from the shear mixing device into a volatile hydrocarbon stream and a partially treated water stream based on difference in density. A compressor directs clean and oil free compressed air to the lead mixer-injector device.

A method for controlling the saturation level of gas in a liquid discharge includes obtaining temperature and pressure measurements of a solvent in a mixing vessel and obtaining a pressure measurement of a source feedstock in a feedstock tank, correlating the temperature and pressure measurements of the solvent to baseline data to generate a theoretical uptake rate for the source feedstock into the solvent and a theoretical flow rate of the source feedstock into the mixing vessel, and determining a required opening setting for a feedstock valve in the feedstock input line in order to achieve a desired liquid displacement in the mixing vessel. The method includes determining an uptake duration and achieving an uptake displacement equivalent to the reverse of the desired liquid displacement. The method includes generating a valve operating control law for how the feedstock valve should function in a cycle.

An ozonated water supply method includes: feeding dissolving water contained in a circulation tank to an ozonation device at a given feed rate while feeding ultrapure water to the circulation tank, and returning ozonated water that has not been used at a use point to the circulation tank, dissolving ozone in the dissolving water using the ozonation device to obtain ozonated water, and feeding the ozonated water to the use point; feeding oxygen gas having a nitrogen gas content of 0.01 vol % or less to a discharge-type ozone gas-producer, and feeding the resulting ozone-containing gas to the ozonation device; adjusting the feed rate of the ultrapure water to the circulation tank; and adjusting the dissolved ozone concentration in the ozonated water. The method can reduce or suppress the accumulation of nitric acid in the recirculation system when a discharge-type ozone gas-producer is used as the ozone gas-producer.

A system for stabilizing gas-infused liquid, includes a tubular flow path configured to receive and pass therethrough the gas-infused liquid under a pressure of at least 20 psi, wherein a surface of the flow path configured to engage the gas-infused liquid flowing through the flow path is formed of material having a surface roughness (Ra) in a range of 0.1 μm-10.0 μm, and the flow path has a length which is at least 100 times a mean inner diameter thereof.

An apparatus configured to generate generating water having nano bubbles of molecular hydrogen on demand. The apparatus is connected to a water supply with a valve and has a pump which supplies pressurized water to a venturi gas liquid mixer that also receives a supply of Hydrogen gas. The mixed hydrogen gas/water steam is provided to a nano bubble generating apparatus that uses cavitation to generate nano bubbles of Hydrogen in the water. The Hydrogen nano bubbles have diameters of less than 200 nm and a concentration of up to 1.2 ppm. Further the concentration remains with 85% of the output concentration for at least 12 hours.

A liquid ejection device for a vehicle washing facility comprises a storage volume, a first supply line coupled upstream to the storage volume for supplying a first liquid, a supply unit coupled upstream to the storage volume for supplying a second liquid, and a removal line coupled downstream to the storage volume for discharging the liquid to be ejected, with a shut-off device for shutting off liquid flow through the removal line. The storage volume is sealed so that an increase in an internal gas pressure occurs in the storage volume when liquid is introduced. The device further comprises a detection unit for detecting the supplied volume of the second liquid into the storage volume and the internal gas pressure in the storage volume, and a control unit controls the supply of the second liquid based on the detected supplied volume of the second liquid and the internal gas pressure so that a predetermined mixing ratio of the first and second liquid is achieved in the storage volume.

In one configuration, a system for enriching a liquid with gas-bubbles is disclosed. The system may include at least one reservoir configured to temporarily store the gas-bubble enriched liquid. Each of the at least one reservoir may include an associated inlet port and an associated outlet port fluidically coupled with each other via a liquid-flow line. The system includes one or more pumps configured to cause movement of the liquid along the liquid-flow line, a gas supply feeding a gas (in one configuration, oxygen from a gas concentrator), and a gas-bubble generator provided on the liquid-flow line. The gas-bubble generator may be fluidically coupled to the gas supply to receive gas from the gas supply. The gas-bubble generator may be configured to generate a plurality of individual gas-bubbles of the gas received from the gas supply and mix with the liquid stream flowing via the gas-bubble generator.