A blade segment of a disc refiner for refining fibrous material has an inner circumference and an outer circumference as well as a first side edge and a second side edge which connect the inner circumference and the outer circumference. The side edges are curved, with one convex and the other concave. The segment has a refining surface with blade bars and grooves which define a pumping direction. The side edges of the blade segment curve in the vicinity of the inner circumference in the pumping direction, and in the vicinity of the outer circumference in a non-pumping direction.

The subject of the present invention is a method for processing electrical and electronic components in order to recover valuable materials, such as the metals contained in printed circuit boards. According to this method, the electrical and electronic components are pre-shredded mechanically and then mixed with a liquid before they undergo wet milling (5).

The subject of the present invention is a method for processing electrical and electronic components in order to recover valuable materials, such as the metals contained in printed circuit boards. According to this method, the electrical and electronic components are pre-shredded mechanically and then mixed with a liquid before they undergo wet milling (5).

Provided is a cell wall or cell membrane disrupting device whereby cell walls and/or cell membranes of microorganisms, algae and the like contained in organic sludge and the like are disrupted, the device comprising a fixed disc, a rotating disc, a rotating shaft for driving of the rotating disc, a pressure reducing means and a housing, wherein at least one pair of the fixed disc and rotating disc are disposed facing each other, the center section of the fixed disc has a hollow section that is larger than the outer diameter of the rotating shaft passing through the center section, shearing force generated between the rotating disc and the fixed disc is applied to a target fluid having a water content of 89% or higher that has been loaded into the device, and the pressure inside the cell wall or cell membrane disrupting device is reduced to no greater than −0.08 MPa by the pressure reducing means. The device can contribute to increasing biogas, reducing sludge, culturing of algae, plant cultivation and culturing of marine products, and also to separation of CH.sub.4 and CO.sub.2, for example, as resources.

Provided is a cell wall or cell membrane disrupting device whereby cell walls and/or cell membranes of microorganisms, algae and the like contained in organic sludge and the like are disrupted, the device comprising a fixed disc, a rotating disc, a rotating shaft for driving of the rotating disc, a pressure reducing means and a housing, wherein at least one pair of the fixed disc and rotating disc are disposed facing each other, the center section of the fixed disc has a hollow section that is larger than the outer diameter of the rotating shaft passing through the center section, shearing force generated between the rotating disc and the fixed disc is applied to a target fluid having a water content of 89% or higher that has been loaded into the device, and the pressure inside the cell wall or cell membrane disrupting device is reduced to no greater than −0.08 MPa by the pressure reducing means. The device can contribute to increasing biogas, reducing sludge, culturing of algae, plant cultivation and culturing of marine products, and also to separation of CH.sub.4 and CO.sub.2, for example, as resources.

Disclosed is a refiner filling piece for a refiner having a rotor that rotates about an axis of rotation and cooperates with a stator to mechanically treat a pulp containing cellulosic fibers. The refiner filling piece is mountable to the rotor or the stator. The refiner filling piece comprises a base and a plurality of spaced-apart refiner bars, each refiner bar being defined by a bar length and a bar height. At least some of the refiner bars have a surface coated with a variable coating. The surface having the variable coating may be the leading surface of the bar.

Disclosed is a refiner filling piece for a refiner having a rotor that rotates about an axis of rotation and cooperates with a stator to mechanically treat a pulp containing cellulosic fibers. The refiner filling piece is mountable to the rotor or the stator. The refiner filling piece comprises a base and a plurality of spaced-apart refiner bars, each refiner bar being defined by a bar length and a bar height. At least some of the refiner bars have a surface coated with a variable coating. The surface having the variable coating may be the leading surface of the bar.

This disclosure relates to an apparatus for a counter-rotating mechanical refiner configured to mitigate the problems of feeding variations, load variations, high energy consumption due to poor feeding efficiency, low pulp quality, and reduced throughput capacity by positioning a flinger proximate to a rotor gap side of a first rotor, wherein the first rotor further comprises an inlet extending through the first rotor, such that a portion of the operational flinger deflects feed material from the inlet into the refiner gap while rotating in the direction of the first rotor.

A powder gathering apparatus includes at least two rotating plates and a driving mechanism. The at least two rotating plates are disposed with respect to each other. Each of the rotating plates includes at least one spherical member. The at least one spherical member protrudes from the rotating plate. The driving mechanism drives at least one of the at least two rotating plates to move, such that the at least two rotating plates get close to or away from each other. The driving mechanism drives the at least two rotating plates to rotate.

A powder gathering apparatus includes at least two rotating plates and a driving mechanism. The at least two rotating plates are disposed with respect to each other. Each of the rotating plates includes at least one spherical member. The at least one spherical member protrudes from the rotating plate. The driving mechanism drives at least one of the at least two rotating plates to move, such that the at least two rotating plates get close to or away from each other. The driving mechanism drives the at least two rotating plates to rotate.