DEVICE FOR FILTRATION OF WASTE WATER COMPRISING A CHENAL IN WHICH PLANT ROOTS DEVELOP

摘要

The device comprises a longitudinal channel (1) containing roots (3) that extend in a channel volume filter, a drain placed at a bottom of the channel, and a unit for reinjecting the extracted water from the channel to an inlet of the channel. The channel volume filter is defined by a level of wastewater in the channel and by longitudinal walls of the channel. The roots from plants (2) form a root hair adapted to retain the suspended pollutions in the wastewater. The portions of plants other than the roots are emerged above a level of water in the channel. The device comprises a longitudinal channel (1) containing roots (3) that extend in a channel volume filter, a drain placed at a bottom of the channel, and a unit for reinjecting the extracted water from the channel to an inlet of the channel. The channel volume filter is defined by a level of wastewater in the channel and by longitudinal walls of the channel. The roots from plants (2) form a root hair adapted to retain the suspended pollutions in the wastewater. The portions of plants other than the roots are emerged above a level of water in the channel. The longitudinal channel: has a height of 20-80 cm; is covered by a biodegradable cap to support the emerged portions of the plants and to pass the roots of plants towards the bottom of the channel; and baffles implanted to predefined locations for optimizing the usage of channel. The cap comprises a bearing structure such as a layer of aerated material including branches or grating and a layer of support material. The support elements of plants are positioned in the channel at predefined intervals. The support elements comprise a plate or a pot positioned on a stake designed to be installed at a bottom of the channel so that the plate or the pot is outcrop to a surface of water in the channel.