A centrifugal separator and a method of controlling a centrifugal separator are disclosed. The centrifugal separator includes a rotor delimiting therein a separation space, an inlet for liquid teed mixture, a first outlet for heavy phase, a second outlet for light phase, and at least one channel extending towards a central portion of the rotor. The method includes separating liquid feed mixture into at least the heavy phase and the light phase in the separation space, and determining at the first outlet that a pressure build-up period has passed, and thereafter determining that an abrupt pressure change takes place at the first outlet, and controlling the centrifugal separator in response to the abrupt pressure change.

An apparatus for facilitating particle separation by density includes a separator having an inner surface surrounding a rotation axis and defining a particle path from an input end to an axially spaced output end. The inner surface includes a plurality of axially spaced dividers having respective inner positions, defining at least in part respective axially spaced retainers for collecting particles during rotation of the separator. The retainers each include at least one fluid inlet for fluidizing particles in the retainer during operation. The dividers include a first pair of adjacent dividers and a second pair of adjacent dividers, the first pair nearer the input end than the second pair, wherein a first divider slope of the first pair is greater than a second divider slope of the second pair and wherein each of the first and second divider slopes is zero or positive. Other systems, apparatuses and methods are disclosed.

An apparatus for facilitating particle separation by density includes a separator having an inner surface surrounding a rotation axis and defining a particle path from an input end to an axially spaced output end. The inner surface includes a plurality of axially spaced dividers having respective inner positions, defining at least in part respective axially spaced retainers for collecting particles during rotation of the separator. The retainers each include at least one fluid inlet for fluidizing particles in the retainer during operation. The dividers include a first pair of adjacent dividers and a second pair of adjacent dividers, the first pair nearer the input end than the second pair, wherein a first divider slope of the first pair is greater than a second divider slope of the second pair and wherein each of the first and second divider slopes is zero or positive. Other systems, apparatuses and methods are disclosed.

A submersible substance separator system having an outer chamber, a top cover plate, an upper cup, a disc stack separator; a middle cup, a submersible actuator, a lower cup, and an interior chamber within the outer chamber; in which one section of the disc stack separator is configured to lead, in response to centrifugal forces, a first separated substance into the upper cup and subsequently into the outer chamber until it reaches a chamber outlet corresponding to the outer chamber; and wherein another section of the disc stack separator is configured to release, in response to centrifugal forces, a second separated substance into the interior chamber until it reaches a chamber outlet corresponding to the interior chamber.

A submersible substance separator system having an outer chamber, a top cover plate, an upper cup, a disc stack separator; a middle cup, a submersible actuator, a lower cup, and an interior chamber within the outer chamber; in which one section of the disc stack separator is configured to lead, in response to centrifugal forces, a first separated substance into the upper cup and subsequently into the outer chamber until it reaches a chamber outlet corresponding to the outer chamber; and wherein another section of the disc stack separator is configured to release, in response to centrifugal forces, a second separated substance into the interior chamber until it reaches a chamber outlet corresponding to the interior chamber.

An apparatus (1) and method for treating contaminated waste water (2). The apparatus comprises a heater (30), a feed apparatus (11, 12, 13, 14), for supplying contaminated waste water (2) to the heater (30) and a centrifuge (50, 60) downstream of the heater (30). A heat exchanger (20) is also provided which has a first channel (22) and a second channel (24). The first channel (22) is connected in a flow path extending between the feed apparatus (11, 12, 13, 14) and the centrifuge (50, 60); and a waste water outlet (9) from the main centrifuge (60) is fluidly coupled to an inlet of the second channel (24) of the heat exchanger (20).

An apparatus (1) and method for treating contaminated waste water (2). The apparatus comprises a heater (30), a feed apparatus (11, 12, 13, 14), for supplying contaminated waste water (2) to the heater (30) and a centrifuge (50, 60) downstream of the heater (30). A heat exchanger (20) is also provided which has a first channel (22) and a second channel (24). The first channel (22) is connected in a flow path extending between the feed apparatus (11, 12, 13, 14) and the centrifuge (50, 60); and a waste water outlet (9) from the main centrifuge (60) is fluidly coupled to an inlet of the second channel (24) of the heat exchanger (20).

An exchangeable separation insert and a modular centrifugal separator are disclosed. The insert includes a rotatable rotor casing and a first stationary portion. The rotor casing delimits a separation space and includes frustoconical separation discs. The first stationary portion is biased in a first direction away from the rotor casing along an axial direction.

An exchangeable separation insert and a modular centrifugal separator are disclosed. The insert includes a rotatable rotor casing and a first stationary portion. The rotor casing delimits a separation space and includes frustoconical separation discs. The first stationary portion is biased in a first direction away from the rotor casing along an axial direction.

A centrifugal separator for separating milk into a cream phase and a skim milk phase is described. The separator includes a centrifuge bowl, a disc stack of conical discs arranged inside the centrifuge bowl. The disc stack includes a first set of discs and a second set of discs, the discs in the disk stack includes distribution openings such that the milk passes the first set of discs before passing the second set of discs. The discs in the first set of discs are separated from each other by a first distance, and the discs in the second set of discs are separated from each other by a second distance which is smaller than the first distance.