Filter for removing sediment from water

1. A water runoff system for removing suspended particles from a liquid, the system comprising:

a filter vessel defining an internal chamber;

a deck positioned within the internal chamber and dividing the internal chamber into an upper chamber and a lower chamber, the deck having a plurality of holes formed therein, each hole having a filtration element therein;

an outlet above the deck for permitting liquid to exit the upper chamber;

an inlet line for introducing a liquid into the internal chamber for treatment flow that passes through the lower chamber, up through the filtration elements and to the outlet;

a ridge positioned atop the deck, the ridge forming an outlet weir atop the deck;

a plurality of the filtration elements are first filtration elements positioned to a first side of the ridge so that treatment flow of the liquid upward through the first filtration elements passes over the outlet weir to reach the outlet; and

at least one the filtration elements is a second filtration element positioned to a second side of the ridge so that treatment flow of the liquid upward through the second filtration element reaches the outlet without passing over the outlet weir;

wherein when flow of the liquid subsides from the inlet, liquid that has accumulated above the deck and on the first side the ridge flows downward through the first filtration elements and into the lower chamber and up through the second filtration element to the outlet, thereby backwashing the first filtration elements.

2. The system of claim 1 , wherein at least one of the first filtration elements comprises a filtration cartridge.

3. The system of claim 1 , further comprising a skirt that is positioned below the deck and surrounds the first filtration elements and the second filtration element.

4. A system for removing suspended particles from a liquid, the system comprising:

a filter vessel defining an internal chamber;

a deck positioned within the internal chamber and dividing the internal chamber into an upper chamber and a lower chamber, the deck having a plurality of holes formed therein, each hole having a filtration cartridge mounted therein and extending down into the lower chamber;

an inlet for introducing a liquid into the internal chamber for a treatment flow through the internal chamber;

an outlet for passing liquid out of the internal chamber;

wherein the treatment flow passes through the lower chamber, up through the filtration cartridges to the upper chamber and then to the outlet; and

a ridge positioned atop the deck, wherein the ridge forms an outlet weir atop the deck, at least one of the filtration cartridges is positioned as a first filtration cartridge on a first side of the ridge so that liquid that moves upward through the first filtration cartridge for filtration during the treatment flow exits the internal chamber by passing over the ridge to reach the outlet of the internal chamber, and when flow of the liquid into the internal chamber subsides the treatment flow also subsides, and liquid that has accumulated above the deck on the first side of the ridge then flows downward through the first filtration cartridge to backwash the first filtration cartridge, causing liquid in the lower chamber to flow upward through another opening in the deck on the second side of the ridge and then to the outlet of the internal chamber without passing over the ridge;

wherein the another opening in the deck contains an additional filtration cartridge, and when flow into the internal chamber subsides, liquid that flows upward through the another opening passes through the additional filtration cartridge.

5. The system of claim 4 , further comprising:

a skirt positioned on a bottom surface of the deck and extending below the deck into the lower chamber.

6. The system of claim 5 , wherein the skirt surrounds at least one of the filtration cartridges.

7. The system of claim 5 , wherein the skirt surrounds all of the filtration cartridges.

8. The system of claim 4 wherein the additional filtration cartridge has a lid with at least one hole sized to induce a pulsing/vibration effect such that during backwash water flowing upward through the at least one hole in the lid creates a vibration.

9. The system of claim 4 wherein each of the filtration cartridges comprises a plurality of elongated filter elements extending downward into the lower chamber, each filter element comprising a pleated filter member disposed around an internal frame to help retain a form of the pleated filter member and to define an internal flow space within the filter element.

10. The system of claim 9 wherein each filter element further comprises an upper cap engaged with a top portion of the pleated filter member and a lower cap engaged with a bottom portion of the pleated filter member.

11. A system for removing suspended particles from a liquid, the system comprising:

a filtration chamber having an inlet for introducing liquid into the filtration chamber for a treatment flow through the filtration chamber, and an outlet for treated liquid;

a deck positioned within the filtration chamber and dividing the filtration chamber into an upper chamber and a lower chamber, a raised outlet weir atop the deck, wherein the deck includes a plurality of holes therein including multiple first holes at a first side of the outlet weir and at least one second hole at a second side of the outlet weir;

wherein each first hole has a respective first filtration element mounted therein;

wherein the treatment flow through the filtration chamber passes through the lower chamber, up through the first filtration elements to the upper chamber and then over the outlet weir to reach the outlet; and

when flow of the liquid into the filtration chamber via the inlet subsides the treatment flow subsides, and liquid that has accumulated above the deck on the first side of the outlet weir then flows downward through the first filtration elements to backwash the first filtration elements, causing liquid in the lower chamber to flow upward through the second hole in the deck and then to the outlet without passing over the outlet weir;

wherein the second hole in the deck includes a second filtration element mounted therein, and when the treatment flow subsides, liquid that flows upward through the second hole passes through the second filtration element.

12. A system for removing suspended particles from a liquid, the system comprising:

a filtration chamber having an inlet for introducing liquid into the filtration chamber for a treatment flow through the filtration chamber, and an outlet;

a deck positioned within the filtration chamber and dividing the filtration chamber into an upper chamber and a lower chamber, a raised outlet weir atop the deck, wherein the deck includes a plurality of holes therein including multiple first holes at a first side of the outlet weir and at least one second hole at a second side of the outlet weir;

wherein each first hole has a respective first filtration element mounted therein;

wherein the treatment flow passes through the lower chamber, up through the first filtration elements to the upper chamber, over the outlet weir and then to the outlet; and

when flow of the liquid into the filtration chamber via the inlet subsides, the treatment flow also subsides, and liquid that has accumulated above the deck on the first side of the outlet weir then flows downward through the first filtration elements to backwash the first filtration elements, causing liquid in the lower chamber to flow upward through the second hole in the deck and then to the outlet without passing over the outlet weir;

wherein the second hole in the deck includes a second filtration element mounted therein, and when the treatment flow subsides, liquid that flows upward through the second hole passes through the second filtration element.