Stormwater treatment apparatus

A stormwater treatment apparatus, comprising:

• a receptacle adapted to receive water flowing from a surface drainage area, the receptacle having at least a top and a bottom;
• an inlet section, the inlet section supplying water to the receptacle;
• an outlet section, the outlet section passing water out of the receptacle;
• at least one mid section, the at least one mid section comprising a fluid communication between the inlet section and the outlet section;
• a permanent pool, the permanent pool defined by at least the bottom wall of the receptacle, and extending upward from said bottom wall to at least the height of said outlet;
• the permanent pool generally below the path of fluid communication;
• the permanent pool forming a region of reduced flow velocity to trap sediments therein.

A stormwater treatment apparatus, comprising:

• a receptacle adapted to receive water flowing from a surface drainage area;
• the receptacle having a bottom, a top, and a perimeter;
• the receptacle having an inlet and an outlet;
• the inlet and the outlet being in fluid communication with one another;
• an active pool, the active pool defined by at least the top wall of the receptacle, the perimeter of the receptacle, and extending downward from said top wall to at least the height of said outlet, the active pool a region of fluid communication between the inlet and the outlet;
• a permanent pool, the permanent pool a region of little or no flow gravitationally beneath the active pool to trap sediments therein.

A stormwater treatment apparatus, comprising:

• a receptacle adapted to receive water flowing from a surface drainage area;
• the receptacle having a bottom, a top, and a perimeter;
• the receptacle having an inlet and an outlet, the outlet including an oriface smaller than the inlet,
• the receptacle having an inlet, the inlet including an integral overflow structure, said overflow structure diverting excess stormwater from said receptacle when said receptacle is at or near full;
• the inlet and the outlet being in fluid communication with one another;
• an active pool, the active pool is a region defined by the top of the receptacle, the sides of the receptacle, and at least the height of the outlet;
• a permanent pool, the permanent pool a region of little or no flow beneath the active pool to trap at least small sediments therein;
• and,
• an inactive pool, the inactive pool a region defined by the permanent pool, at least a first baffle attached to the bottom of the receptacle, a second baffle attached to the bottom of the receptacle, the sides of the receptacle, and the bottom of the receptacle.

An apparatus for separation of pollutants in runoff that are less and more dense than the runoff water, comprising:

• a receptacle adapted to receive stormwater runoff flowing from surface areas tributary to it, the receptacle having a bottom and a top, a left side-wall and a right side-wall, and a front side-wall and end side-wall, forming a rectangular tank;
• an inlet for introducing stormwater flowing from tributary surface areas into the receptacle and an outlet for discharging water;
• at least four baffles positioned within the receptacle between the inlet and the outlet, with all of the baffles attached to both sides of the receptacle, with at least two baffles attached to the bottom of the receptacle and not attached to the top, at least one baffle attached to the top of the receptacle and not attached to the bottom, and at least one baffle that is not attached to the bottom and top of the receptacle;
• an inlet section for receiving water, for decreasing energy of the flowing water, and for uniformly distributing water across the width of the receptacle;
• one or more midsections for trapping materials more dense than water that settle out of water by gravity and for trapping materials less dense than water that rise to the surface of water by gravitational separation;
• an outlet section for discharging water at a controlled rate and for excluding materials more and less dense than water being discharged, the outlet section including an opening located on the end side-wall that allows water in the apparatus to discharge, the outlet substantially smaller than the inlet;
• a mesh screening, the mesh screening from the bottom to the top of the apparatus is attached in a removable fashion to the end side-wall to form a barrier through which any water that discharges through the opening must pass prior to discharge;
• an overflow structure, the overflow structure diverting excess stormwater flow from the receptacle, the overflow structure integral with the receptacle;
• an active pool, the active pool defined by at least the top wall of the receptacle, and extending downward from said top wall to at least the height of said outlet opening;
• a permanent pool, the permanent pool defined by at least the bottom wall of the receptacle, and extending upward to at least the height of said outlet opening;
• and, an inactive pool, the inactive pool defined by at least the permanent pool, the bottom of the receptacle, and the at least two baffles attached to the bottom of the receptacle.

A stormwater treatment apparatus, comprising:

• a receptacle having a top, a bottom, a left side wall and a right side wall, an inlet side wall and an outlet end wall, said receptacle comprising an inlet section, an outlet section and at least one midsection between said inlet section and said outlet section;
• an inlet located in said inlet section, spaced above said bottom;
• an outlet located in said outlet section spaced above said bottom, said outlet height defining a permanent pool water surface elevation level;
• a first baffle having an upstream side and a downstream side, said first baffle connected to said bottom and extending upward no higher than, said permanent pool water surface elevation level, said upstream side of said first baffle including at least a portion angled upward from said bottom and towards said outlet;
• a second baffle between said first baffle and said outlet having an upstream side and a downstream side, said second baffle connected to said bottom and extending upward no higher than said permanent pool water surface elevation level, said upstream side of said second baffle including at least a portion angled upward from said bottom and toward said outlet;
• an active pool, said active pool defined by said inlet, said outlet, and said top of said receptacle;
• and,
• a permanent pool, said permanent pool defined by said first baffle, said second baffle, said left side wall, said right side wall, and said permanent pool water surface elevation level, said permanent pool generally gravitationally below said active pool.

A method for purification and separation of a liquid, the method comprising:

• inputting the liquid into a receptacle through an inlet opening;
• interrupting the flow of the liquid around at least one inlet baffle after the inlet opening;
• communicating the liquid through an active pool to an outlet opening, the outlet opening smaller than the intake opening;
• interrupting the flow of the liquid around at least one outlet baffle before the outlet opening;
• settling sediments from the flow in the active pool into at least one permanent pool, said permanent pool gravitationally below the active pool;
• and,

A stormwater treatment apparatus, comprising:

• a receptacle adapted to receive water flowing from a surface drainage area, comprising:
• the receptacle having an inner wall and an outer wall;
• an inlet, the inlet supplying water to the receptacle;
• an outlet, the outlet passing water out of the receptacle, the inlet and the outlet being in fluid communication with one another;
• and,
• a moveable orifice, the moveable orifice comprising an orifice, said orifice within a flotation collar, said orifice coupled to the outlet by an action arm.

A moveable orifice for a stormwater treatment system, the moveable orifice comprising:

• an orifice for receiving water from a receptacle;
• a flotation collar, the flotation collar coupled to the orifice;
• an action arm including a swing joint, the action arm pivoting the orifice within the receptacle;
• and,
• the orifice in fluid communication with an outlet of the receptacle.

A moveable orifice for a stormwater treatment system, the moveable orifice comprising:

• an orifice for receiving water from a receptacle;
• a flotation collar, the flotation collar coupled to the orifice;
• an action arm including a swing joint, the action arm pivoting the orifice within the receptacle;
• and,
• wherein the orifice is in communication with an outlet of the receptacle.

A method for controlling the time for outflow of storm water from a stormwater mitigation system, comprising:

• controlling a discharge rate from the stormwater mitigation system through a dynamic flow control orifice, the orifice in fluid communication with an outlet from the stormwater mitigation system;
• controlling the position of the orifice relative to the volume in the stormwater mitigation system through a buoyant flotation collar around the orifice;
• protecting the orifice from neutrally buoyant materials in the stormwater mitigation system through a screen over the orifice;
• and, maintaining a position of the orifice in the apparatus via gravity and buoyancy of the orifice and flotation collar.