A pool cleaning assembly includes a frame is that may be manipulated thereby facilitating the frame to be urged through a pool. A float is coupled to the top lateral member. The float floats in the pool thereby facilitating the frame to be oriented upright in the pool. A pair of wheels is provided. Each of the wheels is rotatably coupled to the frame to roll along a bottom of the pool. A plurality of brushes is provided and each of the brushes is removably coupled to the frame. Each of the brushes is frictionally engages the bottom of the pool when the frame is urged through the pool. Thus, each of the brushes cleans the bottom of the pool. A screen is removably coupled to the frame. The screen capture debris when the frame is urged in the pool thereby facilitating the debris to be removed from the pool.

A traveling water screen comprises a basket having a frame including an upper portion, a lower portion, and side portions, a coarse screen secured to the frame, a fine screen overlay attachable to the coarse screen, and a bucket portion secured to a lower portion of the frame, comprising an inner wall surface, and at least one deflector secured to the inner wall surface.

A rotary pressure filter apparatus, a sealing device for use with the rotary pressure filter apparatus, and a process of using the apparatus. The rotary pressure filter apparatus is designed to treat a solid-liquid mixture under pressure in successive work zones. A rotary drum moves compartments containing the solid-liquid mixture through the successive zones. The zones are separated by a sealing member, which is designed to reduce pressure fluctuations as the compartments enter a successive zone.

The present technology relates generally to fluid filtration systems. In particular, several embodiments are directed toward compartmentally expandable rotating belt filters and associated systems and methods. In some embodiments, for example, a filtering system for contaminated fluid includes a first fluid filtering chamber having a first filter belt movably positioned therein and a second fluid filtering chamber having a second filter belt movably positioned therein. The first filter belt can be operable in parallel with the second filter belt. The system can further include a sensor configured to sense a condition related a volume of the contaminated fluid, a speed of flow of the contaminated fluid, or a level of contaminants in the contaminated fluid. A controller can be configured to initiate, stop, or adjust fluid flow to the first fluid filtering chamber and second fluid filtering chamber individually in response to the sensed condition.

A gas tight shale shaker for enhanced drilling fluid recovery and drilled solids washing. A process and apparatus for liquid phase-solid phase separation of oil base drilling mud-containing drill cuttings is described including flowing the drilling mud-containing drill cuttings over a vibrating screen bed to cause a least a portion of the drilling mud to pass through the screen bed and the drill cuttings to remain on the screen bed. A diluent is added to the oil base drilling mud containing drill cuttings prior to flowing the drilling mud containing drill cutting over the screen bed. The entire process is performed in a gas-tight environment preventing escape of diluent from the process into the external atmosphere and preventing introduction of gases into the process from the external atmosphere.

A gas tight shale shaker for enhanced drilling fluid recovery and drilled solids washing. A process and apparatus for liquid phase-solid phase separation of oil base drilling mud-containing drill cuttings is described including flowing the drilling mud-containing drill cuttings over a vibrating screen bed to cause a least a portion of the drilling mud to pass through the screen bed and the drill cuttings to remain on the screen bed. A diluent is added to the oil base drilling mud containing drill cuttings prior to flowing the drilling mud containing drill cutting over the screen bed. The entire process is performed in a gas-tight environment preventing escape of diluent from the process into the external atmosphere and preventing introduction of gases into the process from the external atmosphere.

A method and a pool cleaning robot that may include (i) a turbine that is at least partially disposed within a fluid path of the robot to extract energy from flow of fluid through the fluid path; (ii) an electrical generator for providing electrical power thereto and adapted to be driven by the turbine; (iii) a rechargeable power source arranged to be charged by the electrical generator, and (iv) a controller that is arranged to direct the pool cleaning robot to be positioned in a certain location in which a flow level of fluid that is circulated by a pool fluid circulation system is higher than a flow level of the fluid within a majority of the pool, wherein when positioned at the certain location the fluid that is circulated by the pool fluid circulation system passes through the fluid path.

An underwater station that may include a filter manipulator that is arranged to input, without human intervention, a filter into a pool cleaning robot that is located in a filter replacement position and to assist, without human intervention, in positioning the filter at a filtering position in which the filter is at least partially disposed within a fluid path formed between a first fluid opening and a second fluid opening of the housing thereby allowing the filter to apply a filtering operation on fluid that passes through the fluid path.

A device for filtering a stream of water in a channel (2), includes: a wall (6) adapted to be mounted in the channel and including a through-opening, a filter member (10) mounted on the wall opposite the through-opening and including a filter surface projecting relative to the wall, the filter surface having a larger area than would have a flat filter surface fitted in the through-opening, the filter member including retaining members face to face with the filter surface for retaining the bodies that do not pass through the surface, a suction device disposed facing the retaining members, and elements for driving the filter member and/or the suction device in a relative movement of one in relation to the other such that the suction device is successively brought face to face with each retaining member.

A rotary disc filter is provided with an integrated backwash and chemical cleaning system. In one mode of operation, backwash is directed through a control valve to one or more nozzles for spraying the backwash onto the filter media forming a part of a rotary disc filter. In a second mode, a chemical cleaning mode, the pump directs backwash through an eductor that induces a chemical into the inductor which is mixed with the backwash to form a backwash-chemical mixture that is sprayed onto the filter media. A control system is used in conjunction with the backwash and cleaning systems to monitor process information and/or filter media properties and to determine when to perform backwashes and regenerative cleanings in order to optimize the performance of the filter system.