The invention discloses an agitation device comprising an impeller, an agitating shaft and a power device. The impeller includes a disc, a hub and concave blades. Each blade consists of a concave surface which extends radially and has an annular sector-like shape, the projections of the upper and lower portions of the blade in the horizontal plane are two annular sectors, and the radian of the annular sector obtained by the projection of the upper portion is larger than that of the lower portion, and the annular sector-like shape and the rotation direction of blades are the same, so that each portion of the blades directly faces an incoming flow, the utilization efficiency of blades is increased and the impeller has low energy consumption and high gas-liquid dispersion efficiency. The device is efficient and energy-saving, has low power consumption, high mixing performance and high gas holdup and mass transfer performance.

Aeration discs used in water treatment and methods of using same are disclosed. According to one or more embodiments, an aeration disc may comprise projections and depressions located on at least one of its surfaces. The aeration discs may be incorporated into aeration devices and water treatment systems.

The present invention concerns a stirrer system for animal cell culture consisting of a combination of at least one radially-conveying stirrer element and at least one axially-conveying stirrer element, wherein at least three stirrer elements must be present and the uppermost stirrer element is an axially-conveying stirrer element. The stirrer elements are arranged at a certain distance above one another on a stirrer shaft. A particular embodiment is a multiple stirrer system consisting of two disk stirrers as radially-conveying stirrer elements and an inclined-blade stirrer as an axially-conveying stirrer element wherein the inclined-blade stirrer is arranged above the disk stirrer on the stirrer shaft. The stirrer system according to the invention achieves among others a gentler and better intermixing in the culture of shear-sensitive mammalian cells in cell cultures.

Provided is an ultra-dispersion mixer, for stirring a mixed material for producing a high-quality slurry for an electrode of a secondary battery within a short time by disposing a low-speed blade and a high-speed blade for stirring a mixed material in a chamber so as to easily and effectively disperse elements of the slurry of a secondary battery, supplied to a mixer during a procedure of preparing the slurry of a secondary battery produced by performing mixing procedures multiple times, and disposing blade parts having a plurality of stirring characteristics so as to realize various stirring characteristics in the mixed material on the high-speed blade to increase the dispersion of the mixed material while the mixed material circulates in a high-shear disperser of the chamber and to simultaneously increase the temperature of a supplied solution at the beginning of stirring of the mixed material in the chamber.

The present invention provide a polymer flocculant mixing and dissolving system and a method for mixing and dissolving a polymer flocculant that can produce a polymer flocculant solution in a short period of time using low power.

A polymer flocculant mixing and dissolving system having: a mixing tank (2) in which a solid polymer flocculant is mixed with water as a solvent; a liquid feed unit (3) for feeding an aqueous solution containing the mixed polymer flocculant from the mixing tank; a regenerative mixer (4A, 4B) that comprises a casing arranged at an intermediate position of a channel for the aqueous solution discharged from the liquid feed unit, and a bladed wheel in which grooves are formed in a radial pattern all over an outer circumference, and is used to mix and dissolve the polymer flocculant through pressure application by rotating the bladed wheel in the casing and forming a vortex flow of the aqueous solution along an inner circumferential wall of the casing, furthermore performs pressure the pressure on the discharge side of the regenerative mixer using the pressure adjusting unit.

A mixing system for pigment dispersions, colorants, paints, and coatings, including a mixing or dispersion blade having a disc having top and bottom surfaces and an outboard edge, vanes circumferentially spaced around and extending from the outboard edge of the disc, each vane oriented non-horizontal to the top surface of the disc, and a wear-indicating notch in at least one of the vanes; and a tank, the tank including a paint, pigment dispersion, colorant, or coating.

A mixing system for pigment dispersions, colorants, paints, and coatings, including a mixing or dispersion blade having a disc having top and bottom surfaces and an outboard edge, vanes circumferentially spaced around and extending from the outboard edge of the disc, each vane oriented non-horizontal to the top surface of the disc, and a wear-indicating notch in at least one of the vanes; and a tank, the tank including a paint, pigment dispersion, colorant, or coating.

Mixing systems and methods that include a mixer housing and one or more disk assemblies for mixing and processing materials is disclosed. The disks rotate to mix an additive into the material and to carry agglomerated solids toward a discharge of the mixing system. The disks may have a plurality of fingers or lobes which extend from a central portion of the disks.

Mixing systems and methods that include a mixer housing and one or more disk assemblies for mixing and processing materials is disclosed. The disks rotate to mix an additive into the material and to carry agglomerated solids toward a discharge of the mixing system. The disks may have a plurality of fingers or lobes which extend from a central portion of the disks.

A method and apparatus for the treatment of water and, more particularly, to the mineralization of water in order to improve pH, hardness, turbidity, and/or alkalinity is described. More particularly, a system is provided for the treatment of water that needs additional hardness, alkalinity, and/or pH adjustment while also meeting turbidity requirements. The use of sodium hydroxide and other methods for avoiding turbidity problems can be eliminated and/or minimized.