In a sludge thickener water/wastewater treatment system, sludge solids are recirculated with a mixer positioned in the influent column or offset from the center column and within the stilling well, in order to produce essentially constant sludge solids concentration in the sludge withdrawn from the thickener. This solves the problem of thickeners producing inconsistent underflow solids concentration and often exhibiting problems with binding of rake arms due to sometimes very high sludge concentrations. Also, dewatering steps that follow thickening typically require a relatively constant solids concentration for efficient operation.

The present invention generally relates to the field of pharmaceutical sciences. More specifically, the present invention includes apparatus and devices for the preparation of pharmaceutical formulations containing large diameter synthetic membrane vesicles, such as multivesicular liposomes, methods for preparing such formulations, and the use of specific formulations for therapeutic treatment of subjects in need thereof. Formation and use of the pharmaceutical formulations containing large diameter synthetic membrane vesicles produced by using the apparatus and devices for therapeutic treatment of subjects in need thereof is also contemplated.

The present invention generally relates to the field of pharmaceutical sciences. More specifically, the present invention includes apparatus and devices for the preparation of pharmaceutical formulations containing large diameter synthetic membrane vesicles, such as multivesicular liposomes, methods for preparing such formulations, and the use of specific formulations for therapeutic treatment of subjects in need thereof. Formation and use of the pharmaceutical formulations containing large diameter synthetic membrane vesicles produced by using the apparatus and devices for therapeutic treatment of subjects in need thereof is also contemplated.

The present invention generally relates to the field of pharmaceutical sciences. More specifically, the present invention includes apparatus and devices for the preparation of pharmaceutical formulations containing large diameter synthetic membrane vesicles, such as multivesicular liposomes, methods for preparing such formulations, and the use of specific formulations for therapeutic treatment of subjects in need thereof. Formation and use of the pharmaceutical formulations containing large diameter synthetic membrane vesicles produced by using the apparatus and devices for therapeutic treatment of subjects in need thereof is also contemplated.

Colloidal mixing of cementitious material into a liquid such as water to form a grout slurry for pumping to a location for use includes a mixing tank and a colloidal mixing mill which grinds and pumps the mixed material with the material being repeatedly circulated between the mill and the tank. The colloidal mixing mill includes a housing defining a generally cylindrical chamber containing a rotor shaped to define a clearance of the order of 3 mm between the front and rear wall of the housing and the rotor with holes from a dished front face of the rotor to the rear face to carry the mixed materials to the clearance where a shearing action takes place to shear the particles in the mixed materials prior to exit through the outlet.

A plant and method for controlling such a plant suitable for treatment of waste water. The plant includes a basin, a flow generating machine adapted to generate a liquid flow in the basin, equipment in the basin that effects the momentum of the liquid flow, and a control unit. The method includes the steps of: storing a predetermined relationship between the operational speed N of the flow generating machine and an operational parameter P from which the torque M of the flow generating machine may be derived, determining the operational speed N, determining a set value of the operational parameter P of the flow generating machine, determining a real value of the operational parameter P of the flow generating machine, and adjusting the operational speed N if the real value of the operational parameter P is different than the set value of the operational parameter P.

A mixing unit has a stacked member having mixing elements that are stacked in a stacking direction and that extend in an extending direction, a first plate, and a second plate disposed opposite the first plate. The stacked member is sandwiched between the first plate and the second plate. Each of the mixing elements has first through holes. The second plate comprises an opening portion that communicates with the first through holes in the stacked member.

A system and a method for dispersing by circulating a mixture that simplifies the structure of the part for sealing a shaft of a dispersing device and lengthens the life of the device are provided. The system for dispersing by circulating a slurry or liquid mixture to disperse substances in the mixture comprises a rotating and continuously dispersing device that disperses the mixture, a tank that is connected to an outlet of the dispersing device, a circulating pump that circulates the mixture, and a piping that in series connects the dispersing device, the tank, and the circulating pump. In the dispersing device the outflow of the mixture is greater than the inflow so that an amount of the mixture in the dispersing device is maintained at a level where a part for sealing a shaft that is provided inside the dispersing device is not immersed.

The boundary layer drum mixer is an apparatus which can pass through the narrow top port of a standard chemical drum or bulk container without the need to disassemble any part of the mixer or the vessel. The invention is an enclosed system with an internal arrangement of impellers and stators which draw liquid-based media from the adjacent vessel and strategically distributes it throughout the vessel through an array of outlet ports. The strategic mixing requires low energy input, minimizes the risk of media aeration and works with a wide range of fluid levels. The apparatus imparts no net external torque, and therefore, requires no rigid mounting. The upper impeller flow positively entrains particles or liquid phases that tend to float. The lower impeller flow positively entrains particles or liquid phases that tend to sink and/or remain static in boundary layers against or near the vessel walls and base.

A portable apparatus for borating a continuous flow of water includes metering assemblies provided with corresponding grinders and feeders; a feeder for supplying water to the circuit; a meter and/or flow regulator for adapting the concentration of the products supplied to the water; a pumping arrangement for conveying the mixture to a mixing reactor; a reactor with a mechanical mixer; a recirculation line of the mixer; and a supply pumping arrangement, preferably forming two units in independent cages or containers, including a crane arrangement for supplying the boration products in big bags.