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US 11,253,798 B2Granted
Nutrient removal filtration system and method
AssigneeOldcastle Infrastructure, Inc.
InventorThomas Happel
Life of this patent
Estimating the term…
Abstract
Systems, devices, and methods for providing nutrient removals in an up flow filtration storm water system for treating water to very high clean levels using filtration media. A filtration media can be supported by a screen above a floor in a vault allows for incoming storm water to pass into a void space above the floor into the screen and filtration media and then out an outlet to the vault. The filtration media can include recyclable and/or natural particles. Layers of river rocks can be placed on top of and below the filtration media. The captured debris can drop to the floor. The long lasting filtration media can be cleaned by being backwashed.
Claims19
A nutrient removal filtration system, comprising:
- a generally horizontal lower metal screen having openings of approximately ¼ inch, supported above a bottom of an in-flow vault, with a void space formed between the bottom and the screen;
- a lower layer of loose rocks on the lower metal screen;
- a filtration media of particles resting on the lower layer of loose rocks, the filtration media of particles includes a combination of loose recyclable particles and loose natural particles, wherein storm water flowing into the vault through an inlet passes into the void space and up through the 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.
A nutrient removal filtration system, comprising:
- a generally horizontal lower metal screen having openings of approximately ¼ inch supported above a bottom of a treatment vault, with a void space formed between the bottom and the screen;
- a filtration media of particles resting on the lower metal screen, the filtration media of particles includes a combination of loose recyclable particles and loose natural particle, wherein storm water flowing into the vault through an inlet passes into the void space and up through the 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;
- a floor on the bottom of the vault wherein sediment and debris from the screen and media falls and slides to the floor.
A nutrient removal filtration system, consisting of:
- a generally horizontal lower metal screen having openings of approximately ¼ inch, supported above a bottom of an in-flow vault, with a void space formed between the bottom and the screen;
- a lower layer of loose river rocks on the lower metal screen;
- a filtration media of particles resting on the lower layer of loose rocks, the filtration media of particles includes a combination of loose recyclable particles and loose natural particles, wherein storm water flowing into the vault through an inlet passes into the void space and up through the 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, wherein the filtration media of particles includes particle sizes of between approximately ⅛ of an inch to approximately ½ inch in size, and wherein each of the lower layer of rocks is up to approximately twice the size of filtration media particles.
A nutrient removal filtration system, consisting of:
- a generally horizontal lower metal screen having openings of approximately ¼ inch, supported above a bottom of an in-flow vault, with a void space formed between the bottom and the screen;
- a lower layer of loose river rocks on the lower metal screen;
- a filtration media of particles resting on the lower layer of loose rocks, the filtration media of particles includes a combination of loose recyclable particles and loose natural particles, wherein storm water flowing into the vault through an inlet passes into the void space and up through the 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,
- wherein the filtration media of particles includes particle sizes of between approximately ⅛ of an inch to approximately ½ inch in size,
- wherein each of the lower layer of rocks is up to approximately twice the size of filtration media particles;
- and
- a generally horizontal top metal screen having openings of approximately ¼ inches on top of the filtration media of particles.
4 more elements
A nutrient removal filtration system, consisting of:
- a generally horizontal lower metal screen having openings of approximately ¼ inch, supported above a bottom of an in-flow vault, with a void space formed between the bottom and the screen;
- a lower layer of loose river rocks on the lower metal screen;
- a filtration media of particles resting on the lower layer of loose rocks, the filtration media of particles includes a combination of loose recyclable particles and loose natural particles, wherein storm water flowing into the vault through an inlet passes into the void space and up through the 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,
- wherein the filtration media of particles includes particle sizes of between approximately ⅛ of an inch to approximately ½ inch in size;
- and
- an upper layer of loose river rocks on top of the filtration media of particles, wherein each of the lower layer of rocks and each of the upper layer of loose river rocks is up to approximately twice the size of filtration media particle.
3 more elements
Dependencies are inferred from the claim text.