Methods, apparatuses and systems for filtering dewatered water utilizing primary and secondary containment mechanisms positioned on a portable sled, the primary containment mechanism of the system being a filter bag enclosed by an interior porous fence, the secondary containment mechanism including a filter medium positioned within a channel defined by the interior fence and an exterior porous fence and enclosing the filter bag. Water entering the filter bag exits the bag as filtrate which passes through the secondary containment mechanism and returns to the environment. The system is transported to a different location where filtering may continue utilizing the same filter bag enclosed within the interior fence.

A water inlet protection system and apparatus for removing sediment and/or chemical from water or other fluids is provided. The system may include a filtration material that is configured to be water permeable and to collect sediment within the water. The system may be configured to be removably secured to various types of storm drains or water inlets. The system may include a frame configured to be removably attached to a storm grate. The frame may also include a plurality of tabs extending from the frame and be slidably adjustable. The system may also include an s-clip member or magnets for removably securing the filtration material to a storm drain or water inlet. Furthermore, the water inlet protection system may include one or more over-flow protection openings. The over-flow protection openings may include a raised member or barrier to regulate the water level where over-flow occurs.

An above grate based inlet filter system for erosion and sediment control comprises a natural fiber filter mat configured to extend beyond the perimeter of the grate and a securing mechanism, such as magnets, configured to securing the filter mat around the perimeter of the grate. The system may include a filter berm secured in vicinity to the mat, and a rectangular array of magnets coupling the filter mat to the grate. The natural fiber filter mat may effectively be a coir fiber filter mat extending beyond the perimeter of the grate, wherein the coir fiber filter mat is formed of vertically aligned coir fibers. The optional filter berm may be effectively formed as triangular in cross section and formed of 100% reticulated polyether foam and formed to be at least 3 in height.

A filter pad for use in a dewatering container is presented. The filter pad is configured to fit within the interior cavity and substantially line the interior surfaces. Material, which is usually liquids and slurries, is added to the container with the filter in place and gravity is used to filter the sediment, while the water is released through a release nozzle. The solids are retained in the filter pad for later disposal. The filter pad has a portion that can be selectively opened and is configured for placement substantially adjacent the door to permit selective egress of contents of the interior cavity.

A filter pad for use in a dewatering container is presented. The filter pad is configured to fit within the interior cavity and substantially line the interior surfaces. Material, which is usually liquids and slurries, is added to the container with the filter in place and gravity is used to filter the sediment, while the water is released through a release nozzle. The solids are retained in the filter pad for later disposal. The filter pad has a portion that can be selectively opened and is configured for placement substantially adjacent the door to permit selective egress of contents of the interior cavity.

A water inlet protection system and apparatus for removing sediment and/or chemical from water or other fluids is provided. The system may include a filtration material that is configured to be water permeable and to collect sediment within the water. The system may be configured to be removably secured to various types of storm drains or water inlets. The system may include a frame configured to be removably attached to a storm grate. The frame may also include a plurality of tabs extending from the frame and be slidably adjustable. The system may also include an s-clip member or magnets for removably securing the filtration material to a storm drain or water inlet. Furthermore, the water inlet protection system may include one or more over-flow protection openings. The over-flow protection openings may include a raised member or barrier to regulate the water level where over-flow occurs.

An above grate based inlet filter system for erosion and sediment control comprises a natural fiber filter mat configured to extend beyond the perimeter of the grate and a securing mechanism, such as magnets, configured to securing the filter mat around the perimeter of the grate. The system may include a filter berm secured in vicinity to the mat, and a rectangular array of magnets coupling the filter mat to the grate. The natural fiber filter mat may effectively be a coir fiber filter mat extending beyond the perimeter of the grate, wherein the coir fiber filter mat is formed of vertically aligned coir fibers. The optional filter berm may be effectively formed as triangular in cross section and formed of 100% reticulated polyether foam and formed to be at least 3 in height.

A passive filter assembly can include a filter bowl configured to enclose a filter element therein, a fluid inlet in fluid communication with the filter bowl, a fluid outlet in fluid communication with the filter bowl downstream of the fluid inlet, and a filter cap disposed gravitationally below the filter bowl and configured to receive denser fluid components separated from a bulk fluid when the denser fluid components fall into the filter cap. The filter bowl can be shaped to allow the bulk fluid to swirl therein. The fluid inlet can be configured to cause the bulk fluid entering through the fluid inlet to swirl within the filter bowl to be centrifuged to separate one or more denser fluid components from the bulk fluid. The fluid outlet can be configured to receive a filtered flow downstream of a filter element.