Abstract: The present invention relates to a device (1) for filtering storm water inside a storm drain. The device (1) comprises a filter unit (2), a metal capturing ballast unit (6), and a floating carrier (4) for carrying the filter unit and the metal capturing ballast unit (6). Whereby, in use, the device (1) is arranged in a floating condition in the storm water of the storm drain. The filter unit (2) is at least partially arranged above a surface (5) of the storm water, and the metal capturing ballast unit (6) is arranged below the surface (5) of the storm water. The metal capturing ballast unit (6) comprises a solid material for capturing metal and providing ballast.

Abstract: The present invention relates to a device (1) for filtering storm water inside a storm drain. The device (1) comprises a filter unit (2), a metal capturing ballast unit (6), and a floating carrier (4) for carrying the filter unit and the metal capturing ballast unit (6). Whereby, in use, the device (1) is arranged in a floating condition in the storm water of the storm drain. The filter unit (2) is at least partially arranged above a surface (5) of the storm water, and the metal capturing ballast unit (6) is arranged below the surface (5) of the storm water. The metal capturing ballast unit (6) comprises a solid material for capturing metal and providing ballast.

Abstract: The present invention relates to a system (100) for monitoring an environmental condition in a storm drain (102, 104), the system comprising: A storm drain (102, 104), containing a filter device (134) comprising a filter unit (130) and a floating carrier (132) for carrying the filter unit (130). At least one sensor (106, 108, 110, 112, 114) arranged in the storm drain (102, 104), for determining an environmental condition in the storm drain (102, 104). Wherein the at least one sensor (106, 108, 110, 112, 114) being arranged in communication with a sub node (116, 118) for transmitting data regarding the determined environmental condition in the storm drain (102, 104) to the sub node (116, 118). Wherein the sub node (116, 118) being arranged in communication with a main node (120) for transmitting data regarding the determined environmental condition in the storm drain (102, 104) to the main node (120).

Abstract: A device for filtering stormwater inside a storm drain includes a filter unit and a floating carrier for carrying the filter unit. The filter unit includes a bottom portion and a top portion. The carrier includes an axially extending recess for receiving the bottom portion of the filter unit, so that at least a part of the bottom portion of the filter unit is arranged below a surface of the stormwater inside the storm drain when the device is arranged therein. Through apertures extend radially from an outer surface of the carrier to the recess, so that stormwater at the surface can pass through the apertures and reach the bottom portion of the filter unit. Also a method for filtering stormwater inside a storm drain is disclosed.