A dispenser of nitrogen gas infused cold brew beverages includes a product container, a nitrogenator, a mixing unit, and a dispensing unit. The nitrogenator receives water from a water source and nitrogen gas from a nitrogen gas source and infuses the nitrogen gas into the water to produce nitrogen gas infused water. The mixing unit receives product from a product container and nitrogen gas infused water from the nitrogenator. The mixing unit combines the product and the nitrogen gas infused water to induce a mixing thereof that creates a nitrogen gas infused beverage. The dispensing unit receives nitrogen gas infused beverage from the mixing unit. The dispensing unit chills the nitrogen gas infused beverage to produce a nitrogen gas infused cold brew beverage for dispensing therefrom.

A system for providing deionized (DI) water with a dynamic electrical resistivity is provided. The system includes plural DI water sources, source pipes, flow control devices, a merging pipe and a flow controller. The DI water sources respectively have different electrical resistivities. The source pipes are respectively connected to the DI water sources in a one-to-one manner. The flow control devices are respectively disposed in the source pipes in a one-to-one manner. The merging pipe joins the source pipes. The flow controller includes a resistivity sensor disposed in the merging pipe, and the flow controller is configured to control a flowrate of the DI water through the source pipes.

Systems and methods for blending fluids are provided. A blended fluid may be obtained by mixing a first fluid from a first fluid source with a second fluid from a second fluid source. The blended fluid may be pumped by a pump arranged downstream of a point at which the first and second fluids are mixed, wherein no other pumps are upstream of the pump. First and second flow control valves that control the flow rate of the first and second fluids, respectively, are adjusted so as to reach a target flow rate of the blended fluid, the blended fluid having a target blend of the first fluid and the second fluid.

The present invention relates to a system and method dispensing flows of two or more fluid streams in varying ratios from a fixed ratio piston proportioning pump. The method comprises determining a desired volume of fluid to dispense, determining the total piston displacement amount required to dispense the desired volume of the fluid, measuring a piston displacement amount as the piston moves to determine when the total piston displacement amount has been achieved, and bypassing the fluid at the ingress port or the egress port, preventing the dispense of the fluid while the piston continues to move when the piston displacement amount reaches the total piston displacement amount. Exemplary embodiments include changing chamber volumes to change the ratiometric mixture of two or more fluid streams and using injected fluid as the motive force to move the piston back and forth within the cylinder.

A mixing apparatus includes: a driving device configured to drive first liquid to flow into first transfer chamber and to drive second liquid to flow into second transfer chamber, a first transfer chamber configured to store inflowed first liquid, and a second transfer chamber configured to store inflowed second liquid; a premixing chamber communicating with liquid outlet of first transfer chamber and liquid outlet of second transfer chamber; and a monitor configured to monitor volume of liquid in first transfer chamber and volume of liquid in second transfer chamber, close liquid inlet of first transfer chamber and control first liquid to flow into premixing chamber when volume of first liquid is equal to first value, and close liquid inlet of second transfer chamber and control second liquid to flow into premixing chamber when volume of second liquid is equal to second value.

A system for mixing acid and water can include a tank for holding acid, an acid pump for pumping acid out of the tank, an acid flow meter, an acid control valve, a water pump for pumping water, a water flow meter, a water control valve, a flush valve to selectively flush the system with water, and a controller to monitor the flow meters and control the pumps and the valves. The acid control valve and/or the water control valve can be an electronically controlled valve. The flush valve can be an electronically controlled valve to selectively permit water to flow from downstream of the water pump to upstream of the acid pump. The acid control valve, the water control valve, the flush valve, or any combination thereof can be throttled by the controller to control flow therethrough.

A nitrous oxide gas mixer includes at least one mixing chamber having at least one nitrous oxide gas connection and at least one oxygen gas connection for introduction of oxygen gas and nitrous oxide gas and at least one flow rate controller, by which a volume flow of the two gases can be respectively adjusted separately and/or together. At least one O.sub.2 emergency button is mounted to the mixing chamber for emergency flooding the mixing chamber with oxygen gas and/or with ambient air.

Disclosed herein is a device and methods for enhancing oil separation from produced water. One such method includes mixing a multiphase fluid having at least a water phase and an oil phase with a flotation gas, according to at least one operating condition, so as to produce an enhanced multiphase fluid having bubbles of the flotation gas therein. The oil phase is then separated from the water phase using a separator. At least one property associated with the enhanced multiphase fluid is monitored. The operating condition is adjusted as a function of the monitored property so as to increase a percentage of the oil phase separated from the water phase by the separator over a percentage of the oil phase that would be separated from the water phase without adjustment of the operating condition.

A beverage dispensing system includes an infusion unit and a dispensing station. The infusion unit is to mix a liquid beverage product and a gas to produce a gas-infused liquid beverage product. The infusion unit includes a first infusion unit inlet to receive the liquid beverage product, a second infusion unit inlet to receive the gas, and a first infusion unit outlet to output the gas-infused liquid beverage product. The dispensing station includes a first valve, coupled to the first outlet of the infusion unit, to receive and dispense the gas-infused liquid beverage product. The dispensing station further includes a second valve to receive and dispense the liquid beverage product.

In a method for infusing a gas from a gas source into a liquid beverage, liquid beverage is driven from a beverage container into a liquid inlet port of a venturi mixing device. Nitrogen is infused into the liquid beverage by driving nitrogen through a gas inlet port of the venturi mixing device, thereby delivering nitrogen-infused liquid beverage to a discharge port of the venturi mixing device. The nitrogen-infused liquid beverage is poured from the discharge port through a faucet.