Abstract: An apparatus for comminuting solid waste material including a casing defining a comminution chamber and being open on opposite sides thereof for permitting the flow of liquid therethrough. The apparatus including cooperating substantially parallel first and second shafts, each including a plurality of cutting elements mounted on said first shaft in interspaced relationship with a plurality of second cutting elements mounted on said second shaft, each of said cutting elements having at least one cutting tooth thereon, said cutting elements being positioned between and separated in an axial direction by spacers which are coplanar with the cutting elements of the adjacent stack such that a cutting element from one stack and a spacer from the other stack form a pair of interactive shredding members, wherein the spacers have a textured or scalloped outer cylindrical surface.

Abstract: An apparatus for comminuting solid waste material is provided. The apparatus includes a casing and a comminutor assembly including a plurality of cutting elements mounted on said first shaft in interspaced relationship with a plurality of second cutting elements mounted on said second shaft. The casing includes laterally opposed side rails each having a wall extending parallel to the flow direction of the liquid through the comminution chamber, a plurality of planar fins projecting outwardly of said rear wall in the direction of said stack, aligned with the flow direction of the liquid and being spaced from each other in a vertical direction to form slots therebetween, and the planar fins having a leading edge extending from the wall upstream a rearward edge, the rearward edge extending from an outermost portion of the leading edge toward the wall, and the fins have a path ratio greater than 1.55 to 1.

Abstract: An apparatus and method are provided that enable the control of a screening operation based on a calculated screen blockage percentage and the velocity throughput of the screen. The apparatus includes an upstream level detector, a downstream level detector and flume or weir placed downstream of the screen. The apparatus may further include a blockage determination unit which determines the percent screen blockage based on the flow level upstream of the screen and the flow level downstream of the screen.

Abstract: A comminutor for reducing the particle size of solid waste is provided. The comminutor includes at least two shafts, each fitted with a cutting element. A top portion of each of the shafts is rotatably mounted to a top housing and a bottom portion of each of the shafts is rotatably mounted to a bottom housing. The comminutor also includes a first shaft support disposed between the top portion and the bottom portion for rotatably supporting each of the shafts and a vertical support member attached to the top housing and the bottom housing, the first shaft support being coupled to the vertical support member.

Abstract: An apparatus for comminuting solid waste material is provided. The apparatus includes a casing and a comminutor assembly including a plurality of cutting elements mounted on said first shaft in interspaced relationship with a plurality of second cutting elements mounted on said second shaft. The casing includes laterally opposed side rails each having a wall extending parallel to the flow direction of the liquid through the comminution chamber, a plurality of planar fins projecting outwardly of said rear wall in the direction of said stack, aligned with the flow direction of the liquid and being spaced from each other in a vertical direction to form slots therebetween, and the planar fins having a leading edge extending from the wall upstream a rearward edge, the rearward edge extending from an outermost portion of the leading edge toward the wall, and the fins have a path ratio greater than 1.55 to 1.

Abstract: An apparatus for comminuting solid waste material is provided an includes a casing defining a comminution chamber and being open on opposite sides thereof for permitting the flow of liquid therethrough and a comminutor assembly including cooperating substantially parallel first and second shredding stacks. The comminutor assembly includes first and second parallel shafts rotabably mounted, each including a plurality of cutting elements mounted on said first shaft in interspaced relationship with a plurality of second cutting elements mounted on said second shaft, the cutting elements being positioned between and separated in an axial direction by spacers which are coplanar with the cutting elements of the adjacent stack such that a cutting element from one stack and a spacer from the other stack form a pair of interactive shredding members, wherein the at least one cutting tooth has a plurality of serrations, a tapered profile or a bi-level profile.

Abstract: An apparatus for comminuting solid waste material including a casing defining a comminution chamber and being open on opposite sides thereof for permitting the flow of liquid therethrough. The apparatus including cooperating substantially parallel first and second shafts, each including a plurality of cutting elements mounted on said first shaft in interspaced relationship with a plurality of second cutting elements mounted on said second shaft, each of said cutting elements having at least one cutting tooth thereon, said cutting elements being positioned between and separated in an axial direction by spacers which are coplanar with the cutting elements of the adjacent stack such that a cutting element from one stack and a spacer from the other stack form a pair of interactive shredding members, wherein the spacers have a textured or scalloped outer cylindrical surface.

Abstract: A comminutor for reducing the particle size of solid waste is provided. The comminutor includes at least two shafts, each fitted with a cutting element. A top portion of each of the shafts is rotatably mounted to a top housing and a bottom portion of each of the shafts is rotatably mounted to a bottom housing. The comminutor also includes a first shaft support disposed between the top portion and the bottom portion for rotatably supporting each of the shafts and a vertical support member attached to the top housing and the bottom housing, the first shaft support being coupled to the vertical support member.