Rainwater retention and treatment module and modular rainwater retention and treatment system

Abstract

The subject of the application is a rainwater retention and treatment module, which is characterized in that it comprises a partially open external tank (1) and a closed internal tank (2), wherein: the internal tank (2) is placed inside the external tank (1), in particular coaxially, the internal tank (2) has a smaller volume than the external tank (1), between the external tank (1) and the internal tank (2) there is a space in which there is a layer of soil substrate (6) constituting a substrate for plants (7) and a permeable layer, in particular with a thickness of at least 20 cm, made of drainage material, in particular expanded clay (8), the internal tank (2) has at least one perforation zone (9) with holes ensuring the flow of water collected in this tank (3) to the soil substrate layer (6). The application further covers a modular rainwater retention and treatment system, which is characterized in thatthat it comprises at least two elements, in the form of modules, connected to each other fluidly by connections with pipe elements, each of which comprises a partially open external tank (1) and a closed internal tank (2), wherein: the internal tank (2) is placed inside the external tank (1), in particular coaxially, the internal tank (2) has a cubic capacity smaller than the external tank (1), between the external tank (1) and the internal tank (2) there is a space in which there is a layer of soil substrate (6) constituting a substrate for plants (7) and a permeable layer, in particular with a thickness of at least 20 cm, made of drainage material, in particular expanded clay (8), the internal tank (2) has at least one perforation zone with holes ensuring the flow of water (3) collected in this tank to the layer of soil substrate (6),