A self-cleaning filter device adaptable to the volume of rainwater and a method for its use are described. The self-cleaning filter device adaptable to the volume of rainwater comprises a body including a rainwater inlet, a debris outlet, at least one filtered rainwater outlet, a filter element provided inside the body and comprising a flexible element having a filter means involving and secured to it and whose upper end is connected to said rainwater inlet and whose lower end is connected to said debris outlet, said filter element being provided with an upper portion, a central portion and a lower portion, and a regulating device provided inside the body and connected to the filter element.

A screen intake apparatus for a water intake system uses a cleaning system to clean one or more screen intakes. To clean debris from a screen, pipes in the interior of the screen receive pumped liquid (e.g., water or incompressible liquid) from a pump. Outlets, such as apertures or nozzles, on the pipes then direct the pumped liquid into the interior of the screen. One or more valves can vary, agitate, or pulse the flow of pumped fluid and/or can selectively deliver the pumped liquid to the pipes to remove collected debris from the exterior of the screen. A heater of the system can also heat the pumped liquid for delivery to the pipes to remove or prevent ice formation on the screen.

A screen intake apparatus for a water intake system uses a cleaning system to clean one or more screen intakes. To clean debris from a screen, pipes in the interior of the screen receive pumped liquid (e.g., water or incompressible liquid) from a pump. Outlets, such as apertures or nozzles, on the pipes then direct the pumped liquid into the interior of the screen. One or more valves can vary, agitate, or pulse the flow of pumped fluid and/or can selectively deliver the pumped liquid to the pipes to remove collected debris from the exterior of the screen. A heater of the system can also heat the pumped liquid for delivery to the pipes to remove or prevent ice formation on the screen.

A sea water intake system comprising a main sea water intake pipe, one end of the sea water intake pipe being provided with a centrifugal chamber, the chamber having at least one tangential inlet for entry of sea water to cause rotation of the sea water in the chamber. The other end of the intake pipe terminates in a sump, the sump having a water level lower than that of sea level and having a pump to transport sea water from the sump through a delivery pipe to a treatment plant. A central region of the centrifugal chamber is in fluid communication with a substantially vertical airlift pipe having an air inlet at, or close, to the chamber and a water exit remote from the chamber.

Systems and related methods for purging air burst supply piping of accumulated water prior to delivering pulses of pressurized air to an interior of a screen intake through the air burst supply piping. The systems and methods can include a purge compressor delivering a purging air supply at a head pressure slightly above a head pressure of water in the air burst supply piping, wherein the head pressure of the water is equivalent to a depth at which the intake screen. The system and methods can also include a purge line arranged in a parallel orientation to an air burst supply line, wherein both the purge line and the air burst supply line are operably coupled to a pressurized air tank.

A water directing and distribution system (WDDS) that functions in combination with a natural or man-made water source. The WDDS includes a main pipe with an intake and a termination point. The main pipe is placed into or adjacent to the water source, at a depth below the water source's surface. Water from the water source enters the pipe at the intake and flows through the pipe by force of gravity. The water is maintained within the pipe and directed through the pipe at a lower level than the water source's origination point. Water from the pipe can be accessed via taps placed along the pipe. The water can also be directed to a water storage structure(s) and can be purified for human or animal consumption.

A water directing and distribution system (WDDS) that functions in combination with a natural or man-made water source. The WDDS includes a main pipe with an intake and a termination point. The main pipe is placed into or adjacent to the water source, at a depth below the water source's surface. Water from the water source enters the pipe at the intake and flows through the pipe by force of gravity. The water is maintained within the pipe and directed through the pipe at a lower level than the water source's origination point. Water from the pipe can be accessed via taps placed along the pipe. The water can also be directed to a water storage structure(s) and can be purified for human or animal consumption.

This infiltration intake system for a revetment wall includes a structural body, set on an outer wall surface of a revetment wall, including a filter storage portion, a filter stored in the filter storage portion of the structural body, and a water guide portion guiding treated water passing through the filter toward the side of an inner wall surface of the revetment wall.

This infiltration intake system for a revetment wall includes a structural body, set on an outer wall surface of a revetment wall, including a filter storage portion, a filter stored in the filter storage portion of the structural body, and a water guide portion guiding treated water passing through the filter toward the side of an inner wall surface of the revetment wall.

In this infiltration intake system, a structural body integrally includes a waster discharge direction control portion controlling a discharge direction for wastewater discharged from a filter toward a raw water side at a backwash time with a backwash mechanism portion in a prescribed wastewater discharge direction.