An improved apparatus for filtration has a fluid mixture feed comprising light and heavy fractions fed into the workspace between counter-rotating disk impellers within a tank, thereby forming vortices in the workspace. A static radial exhaust array is located axially in the workspace, comprising exhaust channels, each of which has a peripheral end facing the workspace and an inner end communicating with an axial exhaust drain. An axial pump produces low pressure in the axial exhaust drain, thereby drawing in and anchoring the vortices to the peripheral ends of the exhaust channels so that the exhaust channels can extract the contents of the vortex cores. Vanes can be incorporated into the workspace surface of each disk impeller so that the opposed vanes pass in close proximity, forming vortices along a plurality of radial lanes of intersection, with the peripheral openings of each of the exhaust channels aligned with at least one of the lanes of intersection in the workspace. The feed can be a peripheral feed which enters the workspace radially inward through the periphery of the workspace, or the feed can enter the workspace radially outward through a static axial feed array.

A means to exploit the Dean Vortices for dynamic filtering on a macro scale intended for application in utility and industrial processes is disclosed. This method relies on an apparatus of computed construction to optimize the centripetal force and minimize the effect of gravity on the separation and effectiveness of the Dean Vortices. The method is also supported by an apparatus of construction which results in an optimized elliptical flow channel that enhances the formation and persistence of the Dean Vortices.

An ecological biowater purification system includes at least one water purification tank, each water purification tank including a water inlet, a water outlet, a water purification device, a suction device, a first backflow device and a second backflow device. In particular, the water purification device includes, in order, a sedimentation pool, an anaerobic pool, an anoxic pool, a level-1 and a level-2 biological filter pool, which communicate with one another via baffle boards and communication holes. Each suction device includes a plurality of suction nozzles and suction pipes for discharging precipitates out of the respective water purification tanks. The first backflow device is used to make some water in the level-2 biological filter pool flow back to the sedimentation pool, and the second backflow device is used to make some water in the level-1 and level-2 biological filter pools flow back to the anaerobic pool.

A microfluidic centrifuge device for solution exchange and separation. The device includes a curved fluidic channel, a first inlet and a second inlet in fluid communication with a proximal end of the curved fluid channel, and a first outlet and a second outlet in fluid communication with a distal end of the curved fluidic channel. The curved fluidic channel has dimensions sufficient to direct a first subset of the microparticles to the first outlet by Dean drag and a second subset of the microparticles to the second outlet by inertial force.

A hydrocyclone separator and a method for classifying solid material in liquid suspension are presented. The hydrocyclone separator comprises a head portion having an inlet conduit and an overflow discharge tube arranged in the head portion. The hydrocyclone separator further has an apex discharge port and a tapered separation portion arranged between the head portion and the apex discharge port. The tapered separation portion is tapering distally away from the head portion. Moreover, the hydrocyclone separator has a flow support portion with at least one flow support inlet configured to inject a fluid along at least a portion of an inner surface of the flow support portion towards the apex discharge port, when the hydrocyclone separator is oriented such that the apex discharge port is at a vertically elevated position relative to the overflow discharge tube. Hereby, a hydrocyclone separator capable of achieving improved operational efficiency with reduced risk of clogging the apex discharge port is presented.

Provided is a mixing/clarifying device 100 including a coagulant feeder 10 that feeds coagulant to water to be treated to obtain coagulant-containing water and a tank 20 in which the coagulant-containing water is mixed to form a floc and solid-liquid separation is performed. The tank 20 includes an outer cylinder 21 having an inflow port 210 that flows the coagulant-containing water into the tank 20 and an inner cylinder 22 arranged inserted from the upper side of the tank 20 to the lower side of the inflow port of the outer cylinder 21 and having a lower end open in the tank 20.

The present invention provides a heavy solids separator for separating solids from fluids, comprising a swirl-generating chamber (1) and a solids accumulation chamber (2), wherein the swirl-generating chamber (1) comprises an inlet (3), a solids outlet (4) and a fluid extraction pipe (5) arranged at the centerline (C) of the chamber (1), the inlet arranged at an upper part of the swirl-generating chamber, the solids outlet is fluidly connected to the solids accumulation chamber and arranged in the bottom of the swirl-generating chamber, and the fluid extraction pipe (5) has a fluid inlet (6,19) comprising an opening (6) arranged at the centerline of the fluid extraction pipe, the opening facing the solids outlet (4), and a fluid outlet (7) for extracting fluid out of the swirl-generating chamber; and the solids accumulation chamber (2) comprises a solids inlet (8) fluidly connected to the solids outlet (4) of the swirl-generating chamber, and a solids outlet (9) arranged in a lower part of the solids accumulation chamber; and at least parts of the swirl-generating chamber and the solids accumulation chamber are arranged in a cylindrical housing (12) comprising a funnel-shaped frustoconical element (13) delimiting at least a lower section of the swirl-generating chamber and an upper section of the solids accumulation chamber, the funnel-shaped frustoconical element has an upper opening (14) and a lower opening (15), the upper opening having a larger diameter than the lower opening; wherein the solids accumulation chamber (2) comprises a fluid outlet (10) arranged above the level of the solids inlet (8) and fluidly connected downstream of the fluid outlet (7) of the fluid extraction pipe.

A separator device is provided for removing particles from suspension in a fluid comprises a housing having first and second ports for ingress and egress of fluid into and out of the housing, the first and second ports being on the same vertical line; and at least one separation chamber for separating solid particles from the fluid.

There are provided a duct for use in a system for separating particles suspended in a fluid and a method for designing such duct. The duct comprises at least one trapping-bay portion having a main channel extending along a curved central line defining a fluid flow direction and one or more trapping bays configured for trapping at least a part of the particles and coextensive with the main channel along the central line. The main channel and at least one of the bays are as follows in a cross-section of the trapping-bay portion taken perpendicularly to the central line: the main channel has a basic polygonal shape defined by at least four channel walls including an outer channel wall, an inner channel wall, an upper channel wall and a lower channel wall; and the trapping bay protrudes from at least one of the inner and outer channel walls away from the central line and has bay walls generally parallel to the corresponding walls of the main channel oriented in the same way, the area of the bay being smaller than that of the main channel.

A system and method are provided for producing from a first fluid having particles of a substance suspended or dissolved therein with a first concentration of the substance, a second fluid having a second concentration of the substance lower than the first concentration and a separated-fluid product, in which concentration of the substance is greater than that in the first fluid. The system comprises a pre-treatment module for processing the first fluid to produce aggregates from the substance and at least one separation duct in fluid communication with an outlet of the pre-treatment module, the duct having at least one bay portion having such design as to cause aggregates to accumulate along a pre-determined wall of the bay portion, thereby facilitating separation between the second fluid and the separated-fluid product.