Abstract: 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 trapping bay(s) for trapping at least a part of the particles and coextensive with the channel along the line. The channel and the bay(s) are as follows in a cross-section of the trapping-bay portion taken perpendicularly to the line: the channel has a basic polygonal shape defined by at least four channel walls including outer, inner, upper and lower channel walls; and the bay protrudes from the inner and/or outer channel walls away from the line and has bay walls generally parallel to the corresponding walls of the channel oriented in the same way, the area of the bay smaller than that of the channel.

Abstract: 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.

Abstract: 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.