Vaults, boxes, systems, and methods of treatment systems to capture pollutants from storm water runoff and prevent the conveyance of these pollutants from entering a receiving water body or landscape area, which is designed to be a part of a local permanent storm water drainage infrastructure. A single treatment box, vault and system combines both drainage conveyance, multi-level treatment techniques, variable hydraulic capabilities, and easy and inexpensive methods for servicing the system. A flow spreader can split incoming water to pass into dual screen filtration systems. The system can include components selected from a shelf beneath the spreader, at least one baffle, skimmer, deflectors, media filtration and water pressure lines with spray heads for cleaning debris on a sloped floor.

A baffle for a separator having a cylindrical chamber include a plurality of baffle components arranged in series at least part way around an axis, wherein each of the plurality of baffle components comprises a first connecting portion and a second connecting portion, wherein the first connecting portion of each of the plurality of baffle components is connectable to the first or second connecting portion of a respective first adjacent baffle component of the plurality of baffle components, wherein the second connecting portion of each of the plurality of baffle components is connectable to the first or second connecting portion of a respective second adjacent baffle component of the plurality of baffle components, wherein at least one of the baffle components comprises a vane angled with respect to the axis so as to impede the passage of fluid past the baffle in a direction parallel to the axis.

Provided is a mixing/clarifying device 100 including a coagulant feeder 10 that feeds coagulant to water to be treated to obtain coagulant-containing water and a tank 20 in which the coagulant-containing water is mixed to form a floc and solid-liquid separation is performed. The tank 20 includes an outer cylinder 21 having an inflow port 210 that flows the coagulant-containing water into the tank 20 and an inner cylinder 22 arranged inserted from the upper side of the tank 20 to the lower side of the inflow port of the outer cylinder 21 and having a lower end open in the tank 20.

An apparatus for preventing the escape of hazardous materials from fluid flow control systems of the character used by municipalities for carrying runoff storm water away from streets and populated areas.

A method, system, and apparatus directed to an innovative approach for the treatment of stormwater utilizing hydrodynamic separator assembly designed to maximize flow movement for more efficient sediment removal and maximize clearance space within assembly to facilitate cleaning and increase storage capacity of trash, debris, and sediment. In particular, the described hydrodynamic separator is an improvement over other hydrodynamic separators known in the art with the inclusion of one or more down pipes which siphon water from the lower portion of the sump chamber. The inclusion of down pipes allows for an improved control of the velocity of the water flow through the device by distributing flow into more than one path.

A liquid quality system for removing particulates from liquid (e.g., storm-water runoff). The system can include tubular portion (e.g., a manhole). The tubular portion has an inlet and an outlet. The system includes liquid quality device. The liquid quality device includes a partitioning portion. The partitioning portion has a first region including a funnel shape with a sump inlet aperture. The partitioning portion also has a second region including a sump outlet aperture and optionally a sump access aperture. A sump region is located between a base portion and the partitioning portion, wherein a flow of the liquid travels from the inlet in the tubular portion, into the funnel, through the sump inlet aperture, into the sump region, through the sump outlet aperture, and out the outlet of the tubular portion. At least one drag-inducing portion is positioned proximate the tubular portion in the sump region and projecting inwardly towards a central axis of the sump region.

A settling basin insert for controlling fluid flow into a settling basin has a first and second side wall in opposition, and a top surface extending between the first and second side walls, defining a sump extending from head to end. Fluid apertures extend through the top surface to permit fluid to communicate with the sump and an access aperture in the top surface permits a vacuum hose to pass into the sump. The first side wall is taller than the second side wall, and the first and second side walls each define a guide wall extending above the top surface. The second side wall is configured to be adjacent the settling basin. The first and second side walls direct inflowing fluid along the settling basin insert and through the fluid apertures in the top surface, decelerating the fluid for settling of sediment in the settling basin insert.

A fluid reaction tank is provided having an inlet vortex tube for receiving fluid having suspended solids therein and to impart a vortex motion on the fluid flowing therethrough into a reactor housing having one or more cartridges containing a flocculant composition. The cartridges can have perforated inner sidewalls to allow contact of fluid with the composition. The cartridges can further have vortex forming ridges therein to impart or to maintain the vortex motion of the fluid flowing through the fluid reaction tank.

A pollution trap for storm-water runoff includes a filter-box assembly that provides for top-down maintenance. The filter-box assembly includes at least one filter container, a filter-container support, and a peripheral seal, so the filter container can be lifted from and lowered into the trap from above. The filter container includes sidewalls forming an open bottom and top, a bottom filter support, and a top filter retainer, with the container receiving a stack of intelligently-selected filters supported on the filter support and kept in the container by the top filter retainer. An optional adjustable hold-down assembly holds down the top filter retainer and the underlying filters. The filter-container support holds the filter container up off the trap floor so the storm-water can up-flow through it. And the seal is interposed peripherally between the filter container and the filter-container support so the storm-water cannot flow around the filter container.

A settling basin insert for controlling fluid flow into a settling basin has a first and second side wall in opposition, and a top surface extending between the first and second side walls, defining a sump extending from head to end. Fluid apertures extend through the top surface to permit fluid to communicate with the sump and an access aperture in the top surface permits a vacuum hose to pass into the sump. The first side wall is taller than the second side wall, and the first and second side walls each define a guide wall extending above the top surface. The second side wall is configured to be adjacent the settling basin. The first and second side walls direct inflowing fluid along the settling basin insert and through the fluid apertures in the top surface, decelerating the fluid for settling of sediment in the settling basin insert.