Abstract: A vise having vise members is provided with a vise face on each vise member. The vise faces are opposed and together define an initial vise volume having an open top for receiving loose, wet screenings. The vise faces form jaws moved relative to each other to squeeze the loose, wet screenings, which is a process of enclosing and applying force to the loose, wet screenings to compress the screenings and force the liquid out of or from the material of the screenings. The squeezing makes a loaf volume significantly smaller than the initial volume, and converts the loose wet screenings into a separate dry loaf. A platform has many separate stations. At one station (e.g., receiving & squeezing), a bottom of the trough is sieve-like for draining the liquid from the wet screenings. At another station (e.g., conveying), the bottom of the platform is closed to retain the separate dry loaf of screenings for conveying. At another station (e.g.

Abstract: A programmed bar screen cleaner removes debris from a screen positioned in a channel to prevent the flow of the debris to a liquid treatment. A rake has tines for engaging the screen to move the debris toward and past an upper end of the screen to remove the debris from the screen. Automatic and controllable raking operations are provided to handle the situation in which there is debris jammed in the screen. The jammed debris resists the movement of the rake along the screen, which is sensed via rake motor overloaded, indicated by motor current in excess of a limit. The existence of a jammed rake causes positive release of the rake from the face of the bars, and further movement of the rake is controlled according to the nature of the problem which caused the jamming.

Abstract: Improvements are made to a system in which force is applied to aeration units from only one side of a basin. Part of such force is vector transferred from one end of a beam of the aeration unit to the other end of the beam to move both ends of the beam. The beam supports pipes of the aeration unit. A force transfer module includes one force transfer strand held in a force transfer path between fixed opposite ends of the strand. The force transfer path extends in part along the beam, which is placed in compression. Motion of the one end of the beam resulting from the force is transferred by the single force transfer strand to the opposite end of the beam so that both ends of the beam move relative to the basin under the action of the force.

Abstract: A programmed bar screen cleaner removes debris from a screen positioned in a channel to prevent the flow of the debris to a liquid treatment. A rake has tines for engaging the screen to move the debris toward and past an upper end of the screen to remove the debris from the screen. Automatic and controllable raking operations are provided to handle the situation in which there is debris jammed in the screen. The jammed debris resists the movement of the rake along the screen, which is sensed via rake motor overloaded, indicated by motor current in excess of a limit. The existence of a jammed rake causes positive release of the rake from the face of the bars, and further movement of the rake is controlled according to the nature of the problem which caused the jamming.

Abstract: A universal bar screen cleaner removes debris from a screen positioned in a channel guiding a flow of liquid, solids and the debris. The screen is to prevent the flow of the debris to a liquid treatment basin downstream of the screen. The screen has an upper end, a front side facing the upstream flow and a back side facing the downstream flow. A rake has tines for engaging the screen to move the debris toward and past the upper end of the screen to remove the debris from the screen. A frame supports the rake in a first rake position where the tines are engagable with the screen from the front side, or in a second rake position where the tines are engagable with the screen from the back side.

Abstract: Improvements are made to a system in which force is applied to aeration units from only one side of a basin. Part of such force is vector transferred from one end of a beam of the aeration unit to the other end of the beam to move both ends of the beam. The beam supports pipes of the aeration unit. A force transfer module includes one force transfer strand held in a force transfer path between fixed opposite ends of the strand. The force transfer path extends in part along the beam, which is placed in compression. Motion of the one end of the beam resulting from the force is transferred by the single force transfer strand to the opposite end of the beam so that both ends of the beam move relative to the basin under the action of the force.

Abstract: Force is applied to aeration units from only one side of a basin. Part of such force is transferred from one end of a beam of the aeration unit to the other end of the beam to move both ends of the beam. The beam supports the pipes of the aeration unit. A force transfer module includes one force transfer strand held in a force transfer path between fixed opposite ends of the strand. The force transfer path extends in part along the beam, which is placed in compression. Motion of the one end of the beam resulting from the force is transferred by the single force transfer strand to the opposite end of the beam so that both ends of the beam move relative to the basin under the action of the force. When the aeration unit uses a many-sided frame to support aeration pipes, many modules are used to transfer the force along the pipes to move the entire frame at one time. A method provides a force transfer strand with first and second opposite ends and a length substantially constant under tension.