Abstract: A floating cell with a floating macrophyte filter that can be installed in a chamber containing a volume of fluid to be filtered. The cell has: a layer with a floating macrophyte filter between a perimeter and a centre of the island; supporting means with peripheral structural means for defining a periphery; internal structural means for defining a framework; a central node; peripheral connecting means; internal connecting means; central flotation means and peripheral flotation means.

Abstract: A floating cell with a floating macrophyte filter that can be installed in a chamber containing a volume of fluid to be filtered. The cell has: a layer with a floating macrophyte filter between a perimeter and a centre of the island; supporting means with peripheral structural means for defining a periphery; internal structural means for defining a framework; a central node; peripheral connecting means; internal connecting means; central flotation means and peripheral flotation means.

Abstract: The parked vehicle location system, comprising guiding means (2) distributed in the parking lot; positioning means (4) distributed along the guiding means (2); at least one license plate capturing device (3), comprising traction means for travelling along at least one section (2?,2?) of the guiding means (2); image capturing means (40) for obtaining the license plate of vehicles parked in the parking lot; means for reading (37) the positioning means (4), to determine its position; data transmission means (38) for sending information related to the license plates captured and the position where each license plate was captured to a control unit (5); the control unit (5) with data processing means (52) for obtaining from the information received the license plates of the vehicles parked in the parking lot and the parking space associated with each license plate.