Nutrient removal filtration system and method

A method of removing nutrients from a storm water vault, comprising the steps of:

• providing a horizontal screen supported above a floor of an in-flow vault, with a void space formed between the floor and the screen, the in-flow vault having an inlet wall, an outlet wall, a left wall and a right wall above the floor, the horizontal screen layer extending directly from the left wall to the right wall of the inflow vault in a single plane;
• providing a filtration media resting on the horizontal screen layer;
• providing the floor with at least one slope and with at least one high end and at least one lower end;
• directing storm water flowing into the vault through the inlet to pass into the void space and up through the horizontal screen layer and filtration media and out the vault through an outlet;
• directing debris from the horizontal screen layer and filtration media to slide down the at least one slope on the floor to the at least one lower end;
• and
• removing the debris from the at least one lower end of the at least one slope on the floor.

A nutrient removal filtration system for an inflow vault comprising:

• a horizontal screen supported above a bottom floor of the in-flow vault, with a void space formed between the bottom floor and the horizontal screen, the horizontal screen extending from a left wall to a right wall of the inflow vault in a single horizontal plane;
• a filtration media resting on the horizontal screen, wherein storm water flowing into the vault through an inlet passes into the void space and up through the horizontal screen and filtration media and out the vault through an outlet, so that contaminants, metals, nutrients and solids are removed from the storm water by the filtration system;
• and
• a sloped floor on the bottom floor with a lower end adjacent to an inlet wall to the inflow vault and a higher end adjacent to an outlet wall to the inflow vault so that sediment and debris dropping from the filtration media lands on the sloped floor and slides downward toward the lower end of the sloped floor.