A method of for mixing gases is described. The gases may include a first and a second gas wherein a gas mixing system accepts the gases and operates in a plurality of modes of operation to produce a discharge gas including a mixture thereof, and the second gas may be supplied without the first gas, and the first gas may be supplied without the second gas. The gas mixing system may be integrated with a gas processing system to produce a biogas-related product. The gas mixing system may be a compressor, a jet compressor, an ejector, an eductor, venturi jet pump, eductor-jet pump, and/or a thermocompressor, that uses a first stream of high-pressure gas to entrain a relatively lower pressure second gas, mixes the two, and discharges a third gas mixture that is of a sufficiently elevated pressure to be supplied to other areas of a production facility.

Systems and methods for the automated demineralization of bone and decellularization of soft tissue include a mixing assembly communicatively coupled with a control and reporting system. The mixing assembly includes a housing that supports a cannister sub-assembly forming a mixing chamber having a reagent inlet, a reagent outlet, and an internal fluid agitator. A motor is operably coupled with the agitator and configured to spin the agitator in first and second directions relative to the cannister, thereby agitating fluid contained within the mixing chamber. At least one pump is configured to progressively inject measured quantities of a plurality of reagents into the mixing chamber. The associated control and reporting system includes a user terminal that displays a graphical user interface enabling a user to initiate an automated demineralization or decellularization procedure in which the mixing assembly demineralizes tissue placed within the mixing chamber. Other embodiments are also disclosed.

The system, in one aspect, includes a first bulk storage container for holding a first bulk dry flowable material having a first dispensing assembly coupled with a first outlet, and a second bulk storage container for holding a second bulk dry flowable material having a second dispensing assembly coupled with the second outlet. The system, in one aspect, may further include a mixed storage vessel, as well as a controller in communication with the first dispensing assembly and the second dispensing assembly, the controller programmed to cause the first dispensing assembly to discharge the first amount of the first dry flowable material to the mixed storage vessel and cause the second dispensing assembly to discharge the second amount of the second dry flowable material to the mixed storage vessel over a comparable time period based upon weight based readings the controller receives from first and second load cells.

A liquid measuring beaker is suitable for measuring an amount of a liquid required in a liquid mixing process. The liquid measuring beaker includes a shell and an adjusting partition. The shell defines a reservoir having a volumetric capacity, in which the shell has a first opening passing through a bottom of the shell. The adjusting partition is vertically movable in the reservoir for adjusting the volumetric capacity, in which the adjusting partition has a second opening passing through the adjusting partition.

A module includes a housing, a sealing feature, a locking feature, and an agitator. The housing has an opening separating inner and outer surfaces and a boss that extends through the housing such that part of the outer surface forms an inner bore of the boss having a terminus pointing toward the opening. The agitator has a base, a shaft, and a mixing element coupled to the base such that the base, in cooperation with the sealing feature, circumferentially seals the opening of the housing to form a cavity defined by the inner surface. The shaft passes through the inner bore. The locking feature when engaged permits independent or simultaneous translational and rotational movement of the shaft while an area between the terminus of the boss and the shaft remains mechanically sealed during the movement against liquid or powder encroachment into a clean area of the inner bore.

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.

A dilution system for a hydraulic fracturing fluid includes a dilution manifold, a hydration unit configured to provide a source of liquid, a diluent line connecting the hydration unit to the dilution manifold, a diluent flow control valve on the diluent line, a hydration tank configured to hydrate a mixed additive, a gravity-driven viscous fluid line connecting an exit of the hydration tank to the dilution manifold, a viscous fluid flow meter on the viscous fluid line, and a viscous fluid control valve on the viscous fluid line.

The temperature of concrete can be monitored by a temperature probe. Typically, large volumes of concrete such as are typically carried in mixer trucks or mixed in industrial concrete production drums have a relatively stable, or slowly varying temperature, given the high thermal capacity of concrete. A sudden change in temperature can thus be attributed to an external event. A sudden addition of even a relatively small amount of water for instance, which has an even higher thermal capacity, can produce a notable sudden change in temperature. Examples where the detection of the addition of water can be particularly useful in the production and/or transport of concrete are provided herein. Moreover, if the temperature of the added water is known, and the quantity of concrete is also known, the sudden difference in temperature can be correlated to a volume of added water.

An apparatus for preparing a liquid preparation uses a two-part system. A first part includes a first reagent and a second part includes a second reagent. The first reagent and the second reagent react when mixed to form an active ingredient of the liquid preparation. The liquid preparation is a diluent. The apparatus includes a primary chamber for receiving a quantity of the first part, a quantity of the second part and a quantity of the diluent, a reagent inlet for admitting the first part and the second part to the primary chamber, a diluent inlet connectable to a diluent supply for admitting the diluent to the primary chamber, an outlet for releasing the liquid preparation from the primary chamber, and a flow controller to admit a pre-determined volume of diluent to the primary chamber in a pre-determined time period when the diluent inlet is connected to a diluent supply.

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.