SE466057B - ROTZON PLANT FOR PURIFICATION OF PURIFIED WATER INCLUDING A GROWTH SUBSTANCE IN A TRANSPORTABLE CONTAINER OBTAINED WITH SUMMER MARKET GROWTH - Google Patents

Description

466 057 root system, which is a prerequisite for the plant's efficiency.

This disadvantage is eliminated with the root zone plant according to the invention, where the root zone plant is characterized in that the substrate mass is applied in an open and possibly covered transportable tank.

When using such a tank, the construction of a root zone plant can be started at such a time that the plant is fully functional when it is to be delivered. In practice, this can be done by sowing such a number of tanks with substrate mass that correspond to the expected sales 2-3 years in the future.

The tank is preferably a plastic container or a metal or wooden container, e.g. of waterproof ply-wood, which is lined on the inside with a waterproof plastic foil, e.g. with a thickness of about 2mm. The tank, which is preferably rectangular and e.g. has a length of about 6 m and a width of 2.4 m, is preferably filled with a substrate mass, such as soil, up to a height of 60 - 80 cm.

The rectangular tank preferably contains at its one end a filling of a particulate, inorganic material, such as limestone, marble pieces or shingle, and has at its opposite end another filling of an inorganic material. In the latter filling, a drainage pipe is preferably laid for the removal of the treated wastewater.

Instead of providing fillings at the ends of the tank, open channels can be formed here, which are delimited in relation to the substrate mass by means of water-permeable partitions, such as e.g. can be perforated plastic foil or textile fabric. 4ee.os7å Larger or smaller tanks can be used as required and the tanks can be provided with such interconnecting means that they can be interconnected in parallel.

Upon delivery of a plant according to the invention, the tank or tanks are transported out to the mill site and placed here on top of the ground or in specially designed, possibly. cast, holes in this. A special advantage of the root zone plant according to the invention is that it is environmentally friendly. since the risk of leaking unclean water and pollution of the surrounding soil is completely eliminated.

In addition, the plant can be easily replaced if, for one reason or another, it loses its operability.

Finally, when using a plant according to the invention, one is independent of the location of the plant, since e.g. does not need to take into account special soil conditions.

For safety reasons, a fence is preferably arranged at the upper part of the tank.

The described facility is particularly useful for wastewater treatment. It should be understood, however, that it can also be used for purifying other types of impure water, e.g. water with an undesirably high content of salt. Thus, it has been found appropriate to reduce the content of hardening salts and other salts, such as nitrates, phosphates, and heavy metal salts in groundwater. Water containing an undesirably large amount of organic material can also be purified in the plant.

The invention will be described in more detail below with reference to the accompanying drawings, in which Fig. 1 shows a root zone plant according to the invention seen from above and Fig. 2 shows a vertical section along the line II-II through the root zone plant according to Fig. 1.

In the drawings, 1 denotes a rectangular container which is lined on the inside with a waterproof plastic foil 2. In the container 1 there is a soil mass 3, which is sown with marshland plants (Phragmetis communis). At the right end of the container 1 a filling 5 of an inactive material, such as shingle, is arranged, and a corresponding but narrower filling 6 is arranged at the left end of the container 1. The latter filling 6 is arranged above a drawer pipe 7.

The apparatus shown further comprises a railing 8, which encloses the upper part of the container 1.

When using the plant according to the invention, impure water is introduced, e.g. waste water in the filling 4, from where it penetrates into the soil mass 3 and moves in the direction of the filling 6 and the drainage pipe 7 arranged therein.

During the passage through the soil mass 3, the waste water is purified to such an extent that the purified waste water through the drainage pipe 7 can be supplied to natural recipients or used as fresh water without further purification. then!

Claims (2)

1. l0 15 20 466 057 PATENT REQUIREMENTS A root zone plant for the purification of untreated water comprising a plant substrate (3) in a transportable container (1,2), seeded with marsh plants (4) containing aerated plant tissue called aerenchyme, means (5) for supplying untreated water to the plant substrate (3) and means (6,7) for removing purified water, characterized in that the container (1, 2.) at the inlet is provided with a device such as a filling (5) of a particulate matter, material for distributing the waste water in the substrate mass (3) and at the outlet is provided with a second filling (6) of particulate material for removal of purified water , that the container (1 and 2) has been filled with plant substrate and has been sown and that the root system of the plants has developed before the container (1,2) has been transported to the place of use. Root zone installation according to Claim 1, characterized in that a drainage pipe (7) for the removal of purified water is laid in the second filling (6). Root zone installation according to Claim 1, characterized in that the container (1, 2) consists of a metal or wooden container (1), which is lined on the inside with a waterproof plastic foil (2).