WO2009103101A1

WO2009103101A1 - Filter arrangement

Info

Publication number: WO2009103101A1
Application number: PCT/AT2009/000066
Authority: WO
Inventors: Arnold Klement
Original assignee: Minnova Mineralien Handelsgesellschaft .M.B.H.
Priority date: 2008-02-22
Filing date: 2009-02-19
Publication date: 2009-08-27
Also published as: AT506299B1; AT506299A4

Abstract

Disclosed is a filter arrangement (100) for purifying the water of a body of water arrangement (101) comprising a first water circuit arrangement (1) and a second water circuit arrangement (2). The first water circuit arrangement (1) has a first suction pipe (11), a first pump (12), a first pressure pipe (13), a bottom filter (14), and a first return pipe (15), while the second water circuit arrangement (2) has a second suction pipe (21), a second pump (22), and a second pressure pipe (23). In order to backwash the bottom filter (14) in an inexpensive and environmentally friendly manner, the first pressure pipe (13) and the second suction pipe (21) are connected by means of a blockable connection pipe (3) so as to backwash the bottom filter (14).

Description

A filter assembly

The invention relates to a filter arrangement for cleaning a water of a body of water, in particular a bathing water of a bathing water arrangement, according to the preamble of claim 1.

In this context, the water arrangement is understood as an artificially created, standing body of water which has a usage area and a filter area which is at least partially separated from the usage area, the usage area in particular for swimming therein, ie in particular as a bathing area, and the filter area for filtering the water of the standing one Water is provided. The body of water constitutes an artificial bathing water, which comprises at least one, in particular as a use area, the first area for swimming and a, in particular designed as a filter pool, second area for filtering and cleaning the bath water, so the water to be filtered. The second area comprises a bottom filter which is provided for filtering and for cleaning water to be filtered from the first area, that is, from swimming water.

Filter arrangements for cleaning the water comprising a bottom filter in a first water circulation arrangement and a surface suction connected to a second water circulation arrangement, in particular a skimmer, are known, wherein by means of the filter arrangement two water-purifying and filtering water circuits are formed.

As a result, both the cleaning of the water surface in the working area and the filtering of the water in the working area can be ensured. Usually, the first water cycle arrangement is substantially permanent and the second water cycle arrangement only briefly in operation.

As a soil filter in this context, a mechanical-biological filter is called, which sediment of different crown size, especially round gravel, sand and / or silt comprises, wherein when passing the water through the soil filter, the water is purified, the water inorganic, organic and / or dissolved impurities, in particular nutrients, are withdrawn. This prevents the formation of algae and water turbidity. Likewise, at an entrance of the soil filter in which the water enters the soil filter during filter operation, physical accumulates Contaminants, in particular impurities with dimensions of several millimeters, in particular of leaves, twigs, insects and / or objects.

During operation, impurities and contaminants are thus conducted into the soil filter, whereby the soil filter becomes increasingly clogged. The disadvantage of this is that a necessary pumping power to maintain the water cycle in the first water cycle arrangement increases and that the soil filter can finally fail completely.

In particular, parts of the biofilm in the soil filter die periodically and become mineralized as a result. The disadvantage of this is that nutrients can be redissolved in the water flowing through the bottom filter during further operation, so with further flushing of the soil filter.

Therefore, the soil filter must be cleaned and maintained on a case-by-case basis, in particular at least once a year.

However, since in particular the soil filter is usually difficult to access and manual cleaning and maintenance of the filter body of the soil filter is complicated and / or expensive, so in particular the cleaning of the soil filter by means of a rinse with water. When flushing water is passed in the opposite direction of the flow direction of the water in the filter operation of the filter assembly through the bottom filter, which impurities, especially biomass, dead biofilm, and / or other contaminants, are flushed out of the soil filter. In this case, the water flow direction is reversed by the bottom filter, so the water flows out of the inlet of the soil filter against the conveying direction in the filter operation, in particular backwards out. This type of flushing of the soil filter is due to the backward direction of the water flow through the soil filter, ie from the entrance of the soil filter out, also - and hereinafter - referred to as backwashing. The disadvantage here is that in the filter assembly to an additional backwash line between the first pump and the bottom filter must be formed, which causes not inconsiderable additional installation costs and additional material costs in the preparation of the body of water.

The disadvantage here is further that the first pump is often designed weak performance, it has been shown that biofilm and impurities only slowly detach from the biofilter and thus the backwashing is time consuming and causes high water consumption. The object of the invention is therefore to provide a filter assembly of the type mentioned, with which the disadvantages mentioned can be avoided and with which a backwash of the soil filter can be carried out inexpensively and environmentally friendly.

This is achieved by the features of claim 1 according to the invention.

The advantage here is that the connecting line can be kept short, whereby the - caused by this - material and assembly costs in the production of

Water arrangement can be low.

Another advantage is that the backwashing can be performed by means of the second pump. Usually, the second pump can be stronger, ie with a higher pumping capacity, than the first pump. The performance, that is the

Water flow rate, during backwashing of the bottom filter can be high, causing the

Backwashing the bottom filter, so in a backwash, the contaminants and dead biofilm reliably with high performance and high

Water flow rate can be flushed out of the soil filter. The fact that the backwashing is carried out at high power and high water flow rate, it has surprisingly been found that the impurities and the dead

Biofilm particularly fast, sometimes immediately, replace, the water consumption compared to a conventional backwashing, ie by means of the low-performance first pump, the

Backwashing can even be reduced and so backwashing is environmentally friendly.

The invention also relates to a method for filtering water of a water arrangement with a filter arrangement according to the preamble of claim 18.

The object of the method is, in a water body arrangement the aforementioned

To avoid disadvantages and a cost-effective and environmentally sound backwashing of the

To ensure soil filter.

This is achieved by the features of claim 18 according to the invention.

This results in the advantages mentioned above and advantageous effects.

In particular, in the backwashing of the soil filter no additional water is consumed, so that the backwashing can be done environmentally friendly, cost-effective and especially long and thoroughly. As a result, the release of nutrients into the water can be minimized particularly reliably.

In particular, the connecting line can be short and the backwashing can be carried out by means of the second pump. The subclaims, which as well as the claims 1 and 18 simultaneously form part of the description, relate to further advantageous embodiments of the invention. Particularly preferably, the second water circulation arrangement may comprise a pressure filter and a second return line. In this way, the surface water extracted in the second water cycle can be filtered by means of the pressure filter.

The pressure filter comprises for filtering a filter material, in particular quartz sand and / or filter plates, and is in particular for filtering of physical dirt particles and impurities with dimensions of several millimeters, in particular leaves, branches, insects and / or objects provided.

In this context, it may be advantageously provided that the backwashed water from the bottom filter is passed through the pressure filter, wherein collect the backwashed from the soil filter impurities in the pressure filter. The advantage here is that the pressure filter may have such a double action, the pressure filter on the one hand for filtering the surface water of the water and on the other hand can be used for filtering the contaminants of the soil filter in its backwashing. The advantage here is that the pressure filter can be better than the bottom filter for receiving impurities and physical dirt particles, and thus less quickly clogged. It is also advantageous that the pressure filter can be easily accessible, that a filter material of the pressure filter can be easily changed or mechanically easily cleaned by manual access, whereby the manual cleaning and / or maintenance of the pressure filter can be done easily, quickly and inexpensively. This has the advantage that in the backwashing of the bottom filter used for backwashing, and thereby contaminated water, is not derived from the water body. The advantage here is that the water continues to remain in the water cycle, which no backwashing of the soil filter no additional water consumption, which additional costs for water can be avoided and the environment can be protected. The advantage here is that it can be backwashed longer, the backwashing of the soil filter is particularly thorough and thus the release of nutrients can be particularly reliably prevented.

The invention will be described in more detail with reference to the accompanying drawing, in which only a preferred embodiment is shown by way of example. The FIGURE shows a schematic representation of the water arrangement of a particularly preferred embodiment comprising a use area and a Filter assembly, wherein the filter assembly comprises a first water circulation arrangement and a second water circulation arrangement and wherein the first water circulation arrangement and the second water circulation arrangement are interconnected by means of a lockable connection line.

1 shows a schematic representation of a preferred filter arrangement 100 of a first embodiment for cleaning a water of a water arrangement 101, in particular a bathing water of a bathing water arrangement, comprising a first water cycle arrangement 1 and a second water cycle arrangement 2, wherein the first water cycle arrangement 1 comprises a first suction line 11, a first pump 12, a first pressure line 13, a bottom filter 14 and a first return line 15, and wherein the second water cycle arrangement 2 comprises a second suction line 21, a second pump 22, a second pressure line 23, a pressure filter 24 and a second return line 25 , wherein for the cost-effective and environmentally sound backwashing of the bottom fitter 14 is provided that for backwashing the bottom filter 14, the first pressure line 13 and the second suction line 21 are connected to a connecting line 3.

In operation for filtering the water, ie in a soil filter operation, the water to be filtered in the bottom filter 14 flows through the first water cycle arrangement 1 and essentially from bottom to top through the bottom filter 14, wherein - to ensure uniform flow through the bottom filter 14 - The first water cycle arrangement 1 may be provided in particular for continuous ground filter operation.

In operation for cleaning the water surface, that is, in a surface suction operation, water is sucked from the water surface and pumped through the second water cycle assembly 2, whereby - to rapidly remove contaminants on the water surface - the second water cycle assembly 2 may be provided for temporary surface suction operation. The second water cycle arrangement 2 can also be formed without the pressure filter 24 and the second return line 25 in an advantageous embodiment (not shown) of the filter arrangement 100. In a backwashing operation, that is, in the cleaning of the bottom filter 14 achieved by the backwashing, the water, which is now used to clean the bottom filter 14, flows substantially through the bottom filter 14 from top to bottom. With the preferred filter arrangement 100 according to the first embodiment, the water used for cleaning the bottom filter 14, in particular against a flow direction of the water during filter operation of the bottom filter 14, can be conducted into the utilization area 102 of the water arrangement 101. It is advantageous that out of the soil filter 14 flushed impurities, especially parts of a biofilm, are passed into the pressure filter 15 and collected there.

It is also advantageous that during the backwashing no water from the water body 101 is derived and therefore no additional water is required for backwashing the bottom filter 14, so the backwashing with a long time we can thus be done very thoroughly. The advantage here is that the water is not contaminated and a return of nutrients into the water can be particularly reliably prevented. Since hiebei no water is consumed, the backwashing advantageously takes place particularly environmentally friendly.

Advantageously, it follows that the backwashing, in particular since the backwashing causes substantially no additional costs and no additional water consumption, can often take place, whereby the bottom filter 14 can be kept particularly pure and can have a particularly long service life. As a result, the maintenance intervals of the bottom filter 14 can be extended in an advantageous manner, whereby the costs and / or the effort to operate the body of water 101 low, in particular lower than in the water body 101 with a conventional filter assembly 100 may be. In the advantageous filter arrangement 100 according to the second embodiment, the water used for cleaning the bottom filter 14 can be removed, in particular discharged, from the water arrangement 101. The advantage here is that the impurities and the dead biofilm particularly fast, sometimes immediately replace, the water consumption compared to a conventional backwashing, ie by means of the low-performance first pump 12, during backwashing can even be lowered and thus the backwashing is environmentally friendly

Particularly preferably, the filter arrangement 100 according to the first embodiment or the second embodiment is arranged in the water arrangement 101. The body of water 101 is an artificially sealed to the environment stagnant water and may preferably be formed by one or more artificially sealed to the environment pool. The seal can be accomplished, for example, by means of a waterproof film which is laid in the ground. However, to seal to the environment can Also be made of plastic, composite material, metal Nirosta, concrete or stone formed basin and / or tubs.

The water arrangement 101 comprises at least one use area 102. The use area 102 can be designed as a pond, as a pond biotope, as a swimming pond, as an overflow basin, as an open-air basin and / or as an indoor pool. The use area 102 may in the filled state between 5m ³ and 2000m ³ bath water, which - as the use area includes - as a pool water or - as intended for swimming - can be referred to as swimming water record. Bathing and swimming are terms of equal importance in this context. Furthermore, the water can also be referred to only as water, the water is provided in body of water 101 for bathing. Furthermore, the stagnant water can also be used for purposes other than swimming therein, for example for use as a fishpond, as an ornamental pond and / or as a fountain, the use of which being appropriate use and filter areas are formed in this body of water.

The term "water" is understood to mean the naturally occurring, with biological waste products such as urine, dissolved chemicals such as acids, dissolved gases such as oxygen and minerals such as salt, microorganisms such as plankton, bacteria, insects, algae and much more blended substance, and not just the pure chemical compound H ₂ O.

The bottom filter 14 comprises, in particular in its lower region seen in the operating position, a distribution layer for distributing the water introduced into the bottom filter 14 and - seen in operating position - a filter layer for filtering and cleaning the water passing through the bottom filler. The soil filter 14 may be formed with or without aquatic plants. In the distribution layer, the water to be filtered is introduced, which was sucked off from a swimming area for this purpose. For this purpose, the distribution layer may in particular be formed substantially from coarse-grained material, in particular rock material, preferably gravel and / or gravel. The filter layer, which is formed in particular essentially from fine-grained material, in particular sand, silt and / or clay, serves as a carrier for the biofilm. The biofilm attaches to the fine-grained material and includes bacteria and / or microbes, which absorb nutrients in particular phosphates from the water to be purified. The biofilm and / or the aquatic plants can remove the water also other suspended particles and can for a consistent ph value of the water and prevent the formation of water turbidity and algae. During operation of the bottom filter 14, ie in filter operation, the water rises from the distribution layer to the filter layer and passes through the filter layer. In the soil filter 14 collect in the course of operation, ie in the course of the filter operation, impurities, especially dead parts of the biofilm and physical dirt particles such as leaves, branches, insects and / or objects that can clog a filter layer of the bottom filter 14. Furthermore, there is a risk that by flowing water, so filtered and filtered during the flow of purified bath water, nutrients are redissolved from the dead parts of the biofilm and so get back into the bath water, especially in the swimming area. To prevent this, the bottom filter 14 is occasionally backwashed, in particular at least once a year, preferably after the winter season, wherein the bottom filter 14 flows through in opposite direction to the operating flow direction with water, flushed and backwashed.

The bottom filter 14 may be formed as another basin separate from the usage area 102, in particular as a floor filter basin.

Alternatively, the bottom filter 14, in particular if the water body 101 is formed as a pond, preferably as a pond biotope and / or as a swimming pond, be formed in a region of the use region 102, wherein in the water body 101 preferably no further basin adjacent to the use region 102 is formed is, wherein the soil filter 14 and the use area 102 may in particular have a common water level.

The pressure filter 15 is designed for filtering and purifying the water, in particular of physical dirt particles, in particular contaminants having an extent of at least a few millimeters. For this purpose, the pressure filter 15 may comprise filter plates and / or quartz sand. The advantage here is that the pressure filter 15 can be easily maintained, the quartz sand can be easily replaced and / or the filter plates simply changed manually or simply cleaned manually. Within the meaning of the present filter arrangement 100, the terms filter and purify are equivalent, wherein a filtering of the water is a physical cleaning and the purification of the water can also be done chemically, for example by chemical immobilization and / or reaction, and wherein both the physical Cleaning as well as the chemical cleaning can be carried out both by means of the bottom filter 14 and by means of the pressure filter 15.

In the body of water arrangement 101, in particular with the filter arrangement 100, a method for filtering water of a body of water 101 with a filter assembly 100, wherein - in a soil filter operation - the water is sucked in a first water cycle by means of a first pump 12 of a first water cycle arrangement 1, is passed substantially through a bottom filter 14 from bottom to top and is returned to the use area 102, and the water - in a Oberflächenabsaugungsbetrieb - in a second water cycle separated second water cycle by means of a second pump 22 of a second water circulation system 2 is sucked and in the Usage area 102 is returned. In the method, it is provided that for a backwashing of the bottom filter 14, a connecting line 3 between the first water circuit 1 and the second water circuit 2 is opened, and that in a third water cycle in the bottom filter 14 located water is sucked by the second pump 22, wherein the Bottom filter 14 is traversed substantially from top to bottom with water. The backwashing of the bottom filter 14 may be referred to as backwashing operation.

Particularly preferably, it can be provided that the water in the surface extraction operation is passed through the return passage into the use region 102 through a pressure filter 15. In this case, the surface suction operation can also be referred to as pressure filter operation. In this case, impurities of the water can also be collected in the pressure filter 15.

In this context, it may be advantageously provided in the backwashing that the water pumped out of the bottom filter 14 is pumped into the pressure filter 15, is passed through the pressure filter 15 and is returned to the use region 102. An advantage of the filter arrangement 100 is that during normal operation, ie in the soil filter operation and / or in the surface suction operation, the first water cycle arrangement 1 and the second water cycle arrangement 2 are separated from each other, the first water cycle formed by the first water cycle arrangement 1 and the second water cycle arrangement 2 trained second water cycle separately, that are independent of each other, are formed. In this case, in the first water cycle predetermined a first water flow and in the second water circulation predetermined a second water flow rate can be formed and the first water flow can - in terms of time and flow rate - be regulated independently of the second water flow. In particular, the first water cycle can essentially be operated continuously, that is to say driven, which is advantageous, so that the bottom filter 14 is constantly flowed through uniformly. In particular, the second water cycle in a surface suction operation can only be operated temporarily, for example, as being designed only for the extraction of impurities from the water surface of the usable area 102.

The advantage here is that in one of the two water circuits maintenance work can be performed while the other of the two water circuits are operated, in particular continue to run, can. As a result, a so-called overturning of the water can be prevented even during prolonged maintenance work, wherein the overturning means a significant deviation of the actual state of the water from the desired state of the water and done with a change in the ph value, by algae formation and / or by water turbidity can.

The pumping power required to maintain the water movement of the water is provided in the first water circulation arrangement 1 at least by the first pump 12 and in the second water circulation arrangement 2 at least by the second pump 22. The first pump 12 may advantageously be designed for essentially continuous pumping operation and, since the pumping capacity of the first pump 12 is usually lower than the pumping capacity of the second pump 22, may be referred to as a weak pump of the filter arrangement 100.

The second pump 22 may advantageously be designed for temporary, ie temporary, operation and thereby for generating a flow of water in the useful region 102, and may, because of the compared to the first pump 12 usually stronger performance, referred to as a strong pump of the filter assembly 100 become.

During backwashing of the bottom filter 14, the pumping power required for this purpose is applied by the second pump 22. The power, ie the water flow rate, during backwashing of the bottom filter 14 may be high, whereby the backwash of the bottom filter, ie in backwash, the impurities with high power and high speed of the water and thus reliably from the soil filter 14 can be flushed.

Advantageously, the first suction line 11, the first pump 12 connect to a suction nozzle 16, wherein the suction nozzle 16 for arrangement in a Usage area 102 of the water body 101 is provided. The extraction nozzle 16 can, as shown schematically in the figure, be formed in the edge region of the use region 102, which is provided in particular for the use of the floating therein. However, the extraction nozzle 16 may also be formed on the utility area floor. Likewise, a plurality of exhaust nozzles 16 may be provided in the use region 102 and connected to the first suction line 11.

Advantageously, the first pump 12 may be connected to the bottom filter 14 by means of the first pressure line 13. In particular, the water to be filtered may be introduced into the soil filter 14 in a soil filter water inlet assembly 141, the soil filter water inlet assembly 141 being provided for introducing the water into the soil filter 14. The first pressure line 13 can be easily formed with a predetermined length, whereby the bottom filter 14 can be arranged cost-effective and customer-specific at different distances to the use area 102. In an advantageous manner, it can be provided that the first return line 15 is provided for the return of the water into the utilization area 102 of the water arrangement 101. As a result, a simple return of the water can be ensured without great pressure loss from the bottom filter 14 into the utilization area 102. It may preferably be provided that the second suction line 21 connects the second pump 22 with a surface suction 26, wherein the surface suction 26 is provided for arrangement in the use region 102 of the water arrangement 101. As a result, impurities floating on the surface of the water can preferably be sucked off by means of the second water circulation arrangement 2 and cleaned by means of the pressure filter 15.

In this context, the surface suction 26 may preferably be designed as a skimmer, as shown schematically in the figure.

The surface suction 26 may also be designed as an overflow channel, as it is often used in public baths and / or overflow troughs. Advantageously, the second pump 22 may be connected to the pressure filter 24 by means of the second pressure line 23. The second pressure line 23 can be easily formed with a predetermined length, so that the pressure fuser 24 can be easily, inexpensively and customer-specific arranged at different distances to the use area 102. Likewise advantageously, the second return line 25 may be provided for the return of the water in the utilization area 102 of the water body 101. This allows a simple return of the water without much pressure loss from the pressure filter 15 in the

Usage area 102 are ensured.

In the first water cycle, a barrier may be provided. This can be the first

Water cycle in case of need, for example during maintenance work on the first

Water cycle arrangement 1, to be closed.

Advantageously, it can be provided that in the first pressure line 13, a first

Shut-off valve 17 is arranged, which can be closed in particular for backwashing the bottom filter 14.

In the second water cycle, a further shut-off can be provided. Thus, the second water cycle in case of need, for example, during maintenance on the second

Water cycle arrangement 2, to be closed.

Advantageously, the further shut-off can be arranged as a second shut-off valve 29 in the second suction line 21.

Particularly preferably, in the connecting line 3, a third shut-off valve 31, for example a stopcock, be arranged, wherein the third shut-off valve 31 for

Shut off and the opening of the connecting line 3 between the first water cycle

1 and the second water circuit 2 is provided.

In the opened third shut-off valve 31, the first water circuit and the second

Water cycle operatively connected. A water transfer from the first water cycle in the second water circulation and vice versa is possible.

In a particularly advantageous manner can be provided that in the backwashing of the

Floor filter 14 of the first water cycle 1 and the second water circuit 2 are shut off. The shut-off of the water circuits 1, 2 can be done in particular by closing the first shut-off valve 17 and the second shut-off valve 29. As a result, it can reliably be prevented that water is directly pumped out of the area of use during the rewinding via the first suction line 11 and / or the second suction line 21. The reliable backwashing can be ensured in this way.

In the closed third shut-off valve 31, the first water circuit and the second

Water cycle separated from each other, so separately and therefore not operatively connected. One

Water transfer from the first water cycle in the second water cycle and vice versa is impossible. Advantageously, it can be provided that for backwashing the bottom filter 14, the connecting line 3 is opened between the first water circuit 1 and the second water circuit 2, and that the water in the bottom filter 14, in particular bath water, is pumped through the pressure filter 15 and in the usage area 102 is returned. In this case, the water, in particular the bath water, is conveyed by means of the second pump 24 into the pressure filter 15 and filtered therein, before the return line into the utilization area 102. As a result, no additional pump is required for backwashing the bottom filter 14, with which the filter arrangement 100 can be formed particularly cost-effectively. For this purpose, the second pump 24 can preferably be operated in the same conveying direction as in the filter operation of the first water circuit.

It is advantageous that the soil filter 14 at least partially clogging impurities can be flushed in the direction of the pressure filter 15 and can collect in the pressure filter 15. As a result, clogging of the bottom filter 14 can be prevented or the function of the clogged bottom filter 14 can be restored easily, quickly and inexpensively.

To clean the pressure filter 15 of this - as in the prior art - also be backwashed, which in the backwashing of the pressure filter 15 this is also flowed through with water against the operating flow direction during operation of the pressure filter 15. In an advantageous embodiment, a first T-piece 18 may be formed in the first pressure line 13, wherein the first T-piece 18, the connection line 3 branches off from the first pressure line 13. Thereby, a simple assembly of the first water cycle arrangement 1 and the connecting line 3 can be ensured. In particular, it can be provided that in the second suction line 21, a second tee 28 is formed, and that the second T-piece 28, the connecting line 3 opens into the second suction line 21. As a result, a simple assembly of the second water circuit arrangement 2 and the connecting line 3 can be ensured. Advantageously, it can be provided that a first return opening 103 is arranged in the use area 102, and that the first return opening 103 is operatively connected to the first water cycle arrangement 1, in particular the first return line 15. Likewise, it may advantageously be provided that a second return opening 104 is arranged in the use area 102, and that the second return opening 104 is arranged with the second water circuit arrangement 2, in particular the second return line 25, is operatively connected.

It can be provided that the first return opening 103 spaced from the second

Return opening 104 is formed, whereby the first water circulation arrangement 1 and the second water circulation arrangement 2 are spatially substantially completely separated from each other.

The first return opening 103 and the second return opening 104 may preferably - as shown schematically in the figure - in the utility area edge and / or can in

Use area floor be formed.

Alternatively, it may be provided that the first return line 15 and the second

Return line 25, in particular in an area immediately adjacent to the use area

102, are merged and connected to a common return opening.

Such is instead of two return openings only a return opening in

Usage area trained.

Further embodiments according to the invention have only a part of the features described, wherein each feature combination, in particular also of various described embodiments, can be provided.

Claims

PATENT APPLICATIONS

A filter assembly (100) for cleaning a water of a body of water (101) comprising a first water loop assembly (1) and a second water loop assembly (2), the first water loop assembly (1) having a first suction line (11), a first pump (12). a first pressure line (13), a bottom filter (14) and a first return line (15), and wherein the second water cycle arrangement (2) comprises a second suction line (21), a second pump (22) and a second pressure line (23) comprises, characterized in that for backwashing the bottom filter (14), the first pressure line (13) and the second suction line (21) with a lockable connection line (3) are connected.

2. Filter arrangement according to claim 1, characterized in that the first suction line (11) connects the first pump (12) with a suction nozzle (16), wherein the suction nozzle (16) for arrangement in a utilization area (102) of the water body

(101) is provided.

3. Filter arrangement according to claim 1 or 2, characterized in that the first pump (12) with the first pressure line (13) is connected to the bottom filter (14).

4. Filter arrangement according to one of claims 2 or 3, characterized in that the first return line (15) for returning the water in the use area (102) of the body of water (101) is provided.

5. Filter arrangement according to one of claims 1 to 4, characterized in that the second suction line (21) connects the second pump (22) with a surface suction (26), wherein the surface suction (26) for arrangement in the utilization area

(102) of the body of water (101) is provided.

6. Filter arrangement according to one of claims 1 to 5, characterized in that the second water circulation arrangement (2) comprises a pressure filter (24) and a second return line (25).

7. Filter arrangement according to claim 6, characterized in that the second pump (22) with the second pressure line (23) is connected to the pressure filter (24).

8. Filter arrangement according to one of claims 6 or 7, characterized in that the second return line (25) for returning the water in the use area (102) of the body of water (101) is provided.

9. Filter arrangement according to one of claims 1 to 8, characterized in that in the first pressure line (13) a first shut-off valve (17) is arranged.

10. Filter arrangement according to one of claims 1 to 9, characterized in that in the second suction line (21) a second shut-off valve (29) is arranged.

11. Filter arrangement according to one of claims 1 to 10, characterized in that in the connecting line (3), a third shut-off valve (31) is arranged.

12. Filter arrangement according to one of claims 1 to 11, characterized in that in the first pressure line (13) has a first T-piece (18) is formed, and that the first T-piece (18), the connecting line (3) of the first pressure line (13) branches off.

13. Filter arrangement according to one of claims 1 to 12, characterized in that in the second suction line (21), a second T-piece (28) is formed, and that on the second T-piece (28), the connecting line (3) in the second suction line (21) opens.

14. Water body arrangement (101) comprising at least one use area (102), characterized by a filter arrangement (100) for cleaning a water of the water body arrangement (101) according to one of claims 1 to 13.

15. A water arrangement according to claim 14, characterized in that in the use area (102) an exhaust nozzle (16) is arranged, that the suction nozzle (16) with the first water circulation arrangement (1), in particular the first suction line (11), is operatively connected, and that the suction nozzle (16) - is disposed below the water surface in the water-filled use area (102).

16. Water body arrangement according to claim 14 or 15, characterized in that in the use area (102) has a surface suction (26) is arranged, and that the surface suction (26) with the second water circulation arrangement (2), in particular the second suction line (21), operatively connected is.

17. A water arrangement according to claim 14, 15 or 16, characterized in that in the utilization area (102) a first return opening (103) is arranged, and that the first return opening (103) with the first water cycle arrangement (1), in particular the first return line ( 15), is operatively connected.

18. Water body arrangement according to claim 14, 15, 16 or 17, characterized in that in the utilization area (102) a second return opening (104) is arranged, and that the second return opening (104) with the second water circulation arrangement (2), in particular the second Return line (25), is operatively connected.

19. A method for filtering water from a body of water (101) with a filter assembly (100), wherein - in a soil filter operation - the water in a first water cycle by means of a first pump (12) of a first water circulation arrangement (1) from a use area (102) is sucked out, is passed substantially through a bottom filter (14) from bottom to top and is returned to the utilization area (102), the water - in a surface suction operation - in a second water cycle separated from the first water cycle by means of a second pump (22) a second water circulation arrangement (2) is sucked out of the utilization area (102) and is returned to the utilization area (102), characterized in that a connecting line (3) between the first water circulation (1) and the backwash of the bottom feeder (14) second water cycle (2) is opened, and that in a third water cycle in the bottom filt he (14) located water is sucked by means of the second pump (22), wherein the bottom filter (14) is traversed substantially from top to bottom with water.

20. The method according to claim 19, characterized in that the water is passed in the surface suction before returning to the use area 102 through a pressure filter 15.

21. Method according to claim 20, characterized in that the water pumped out of the bottom filter (14) is pumped into the pressure filter (15), passed through the pressure filter (15) and returned to the utilization area (102).

22. The method of claim 19, 20 or 21, characterized in that in the backwashing of the bottom filter (14) of the first water cycle (1) and the second water cycle (2) are shut off.