DE102022115962A1 - Process and system for processing water - Google Patents

Abstract

A device for treating water, comprising:
- an inlet for supplying the water to be treated,
- a sedimentation device adjoining the inlet for sedimentation of suspended matter from the water to be treated, the sedimentation device being at least
- an enrichment path for enriching the water to be treated with a coagulant and
- has a regulating path following the enrichment path for introducing a regulating agent which adjusts the pH value of the water, and
- a filter device adjoining the sedimentation device with a filter medium which is mounted so that it can move through the filter device in a direction at an angle to the flow direction of the water to be treated, and
- A reverse osmosis device connected to the filter device for further filtering of the water and a method for processing water in the device.

Description

The present invention relates to a method for processing water according to the preamble of claim 1, which is designed in particular as a compact system for single or multi-family houses, small businesses, high-rise buildings and the like.

A multi-stage water treatment in the sedimentation device can enable both the reduction and/or removal of hardness formers, in particular calcium ions, and also lead to a reduction in TOC (total organic carbon) in drinking water. Although this two-stage procedure is known, it is not the standard procedure for water treatment and is usually contradictory, since the TOC reduction is typically achieved at a low pH value between 4.0-7.3 and the reduction in hardness formers is typically achieved at higher pH values between 9.5-11.5 can be achieved. The presence of TOCs also acts as an inhibitor in the precipitation of calcium.

When carrying out this special process, extensive subsequent steps are typically required, which makes the dimensioning of the system almost unsuitable for the use of 50 PE (population values) - 1000 PE's. Such information is used, among other things, to specify small sewage treatment plants DIN EN 12566 (A1 version from 2003) and DWA-A 222 used.

Grease separators and/or small sewage treatment plants are typically used to treat household wastewater, which deliver satisfactory results for this type of wastewater.

The situation is different in the field of system catering, in which the dirt load per cubic meter of water is significantly higher than with conventional household wastewater. This is where small sewage treatment plants and/or grease separators reach their limits. At the same time, wastewater disposal facilities or sewer operators have specifications for a maximum dirt load for this type of wastewater.

Water treatment systems for this area of application are hardly known, especially in the system catering application, the focus is on problems such as a small installation space requirement and a small number of maintenance cycles, which have so far only been inadequately solved by on-site treatment systems.

Based on this preliminary consideration, the object of the present invention is to provide a system for water treatment for wastewater with a high dirt load, which is characterized by a compact structure and almost maintenance-free operation with the highest possible cleaning efficiency.

The present invention solves this problem by a device with the features of claim 1,

• - einen Zulauf zum Zuführen des zu behandelnden Wassers,
• - einen sich an den Zulauf anschließende Sedimientierungseinrichtung zur Sedimentierung von Schwebstoffen aus dem zu behandelnden Wasser wobei die Sedimentierungseinrichtung zumindest
• - einen Anreicherungspfad zum Anreichern des zu behandelnden Wassers mit einem Koagulanten und
• - einen sich an den Anreicherungspfad anschließenden Regulierungspfad zum Einbringen eines den pH-Wert des Wassers einstellenden Regulierungsmittels aufweist, und
• - eine sich an die Sedimentierungseinrichtung anschließende Filtereinrichtung mit einem Filtermedium, das in einer Richtung winklig zur Fließrichtung des zu behandelnden Wassers durch die Filtereinrichtung beweglich angetrieben gelagert ist, und
• - eine sich an die Filtereinrichtung anschließende Umkehrosmoseeinrichtung zur weitergehenden Filterung des Wassers.

A device according to the invention for treating water comprises

• - an inlet for supplying the water to be treated,
• - a sedimentation device adjoining the inlet for sedimentation of suspended matter from the water to be treated, the sedimentation device being at least
• - an enrichment path for enriching the water to be treated with a coagulant and
• - has a regulating path following the enrichment path for introducing a regulating agent which adjusts the pH value of the water, and
• - a filter device adjoining the sedimentation device with a filter medium which is mounted so that it can move through the filter device in a direction at an angle to the flow direction of the water to be treated, and
• - A reverse osmosis device connected to the filter device for further filtering of the water.

The sedimentation device is already characterized by a high degree of cleaning, as it achieves the reduction of hardness formers such as calcium compounds by adding the regulating agent on the one hand and at the same time a reduction in the TOC content by adding the coagulant in a single device. The sedimentation is supported by the compaction of the flakes formed through the formation of a hydroxide species. The specific density of the flakes formed by the coagulant changes.

The regulation path can be followed by a flocculation path, in which precipitation is initiated after the addition of the regulation agent, typically a base, in particular a sodium hydroxide solution. In particular, an inclined lamella clarifier can be used as a sedimentation system.

The sedimentation system can optionally be supplemented by a gas inlet to mix the regulating agent and the coagulant with the wastewater. However, a conventional slat clarifier can also be used for sedimentation without gas introduction.

The slats enable a more defined division of the respective paths within a housing of the sedimentation device into different sections and at the same time increase the efficient clarifying area for sedimentation after precipitation has taken place.

Despite sedimentation, suspended matter or other finely divided solids may still be present within the water when it leaves the sedimentation device. On the one hand, these can be particles that are not bound by the coagulant or smaller solid particles formed by the coagulant and regulating agent that have not yet agglomerated into larger units.

At this point, the device according to the invention has a filter device with a movably mounted filter medium. The movement of the filter medium takes place in a direction at an angle to the flow direction of the water to be treated through the filter device. The expert knows this as dynamic cross-flow filtration, or DCF for short, in which the filter medium is moved relative to the water to be treated. If the filter medium rotates around an axis of rotation, this is referred to as rotation-dynamic cross-flow filtration. Using this form of cross-flow filtration allows for the efficient removal of large numbers of particles from the water. At the same time, it is compact and can be operated in a self-cleaning and therefore almost maintenance-free manner, in particular thanks to a return impulse device.

It has surprisingly been shown that the arrangement of this filter device between the sedimentation device and a downstream reverse osmosis device prevents the reverse osmosis device from blocking, which would otherwise lead to short maintenance intervals for the system due to the particle content of the water downstream of the sedimentation device.

Dynamic cross-flow filtration is also characterized by its compact overall structure, which is an advantage for the application area mentioned at the beginning with low population values, e.g. in fast food restaurants and the like.

The reverse osmosis device enables both further removal of fine particles and a reduction in salt content.

The process described above is therefore a multi-stage chemical/physical process for the treatment of wastewater from system gastonomy or, in other words, kitchen wastewater with a high contamination load. The processed water provided by the process can be used as process water.

Common large-scale processes using biological stages are preferably not used in the present process due to their large space requirements and the process risks.

The present method and the associated device are designed in particular for the catering industry or in a catering establishment, in particular system catering, such as fast food restaurants or so-called QS restaurants (quick service restaurants).

The above-described device and method make it possible for the dirt load to be introduced into the sewer network to be reduced to such an extent that it meets the requirements for discharge.

Furthermore, a partial stream can be reused as service water in system catering, especially in buildings, for example as toilet flushing water or the like.

In addition to the well-known quick service restaurants, large kitchens, for example in hospitals, canteens, etc., are also considered system catering.

Advantageous embodiments of the device according to the invention are the subject of the subclaims.

The filter device can have a container and a filter element arranged therein, the filter element having a hollow shaft and one or more filter disks arranged coaxially on the hollow shaft. The one filter disk or the several filter disks preferably have the filter medium and/or consist of it. It is possible for several filter plates to be assembled on a frame to form the filter disk. The filter plates can, for example, have a circular sector-shaped filter surface. In this case, the frame can be made of a different material than the filter plates. However, it is also possible for a corresponding filter disk to be formed uniformly from the filter medium.

The filter element or at least the filter disks can be rotatably mounted in the container. This makes it possible for the filter disks to be rotatably mounted around the hollow shaft. In an alternative preferred variant, the filter disks are firmly connected to the hollow shaft and this in turn is rotatably mounted in the container. The entire filter element is therefore rotatably mounted. The second variant is structurally simpler to implement.

The filter disks preferably have a fluid drainage area in their interior, which opens into the hollow shaft, such that the drainage of a filtrate from the filter device takes place along the longitudinal axis of the hollow shaft.

The filter medium can advantageously have an average porosity over the filter medium surface between 5 - 200 nm, in particular between 30 - 100 nm. Particles above this size would clog the membrane of the downstream reverse osmosis device after just a short period of operation so that cleaning would be necessary.

The filter medium can preferably be formed from a ceramic material, preferably from aluminum oxide and/or zirconium oxide. Such a material is particularly suitable for long operating times and is comparatively robust against mechanical damage.

The filter device can have a return pulse system for self-cleaning. This can preferably be a counter-pressure generator and particularly preferably a piston lifting device. The return pulse system can preferably be arranged along a filtrate discharge line of the filter device, so that the return pulse is introduced from the clean side of the filter medium and the pulse on the raw side of the filter medium causes deposits to be loosened.

The filter device can, in particular on the clean side, have one or more sensors for monitoring the filter efficiency, preferably a flow measuring device for measuring flow and/or a turbidity sensor for measuring the solids content of the filtered water. Instead of the turbidity sensor, other sensors, e.g. a viscosity measuring device, can also be used for the stated purpose of measuring the solids content. A control and/or evaluation unit can adjust the movement speed of the filter medium, in particular the rotation speed of the filter disks, and/or the inlet volume of water to be cleaned or the medium pressure within the container based on the sensor measured values of the solids content.

The flow measuring device enables monitoring of the degree of contamination of the filter medium and can also, in conjunction with a control and/or evaluation unit, initiate a return pulse for self-cleaning, a CIP cleaning by introducing a cleaning medium in addition to self-cleaning by means of return pulses and/or a cleaning by dismantling the filter device .

The filter device can have two of the filter elements, with the filter disks of a first of the filter elements each protruding into a space between two filter disks of a second of the filter elements. As a result, in an axial plan view, an overlap area is formed between the filter elements, in which the water to be filtered is subjected to a shear stress, which additionally supports the filtration and at the same time prevents the filter medium from clogging during operation over a longer period of time.

The aforementioned device for treating water can be used in particular as a treatment system for the treatment of kitchen water with a very high protective content, in particular cooking fats and the like.

The process water provided by the device and the subsequent process has such a high level of purity that it sufficiently meets the requirements of sewer operators in the European Economic Area or other nations for discharge into a sewer system. At the same time, the industrial water obtained can be used to cover the respective catering establishment's own needs.

In addition, a reduction in waste disposal costs can be made possible and a product can be created on site for reuse using the process water.

1. a) Zuführen des zu behandelnden Wassers in die Sedimentrierungseinrichtung, wobei in dieser Sedimen trierungseinrichtung in einem Anreicherungspfad das zu behandelnde Wasser mit einem Koagulanten, insbesondere mit einer Lewis-Säure, angereichert wird in einem Regulierungspfad ein den pH-Wert des Wassers einstellendes Regulierungsmittel, insbesondere eine Lauge, zugegeben wird, derart, dass eine Flockung insbesondere bei gleichzeitiger Ausfällung von Härtebildnern initiiert wird und schließlich ein Dekantieren eines Überstands an Wasser von einem sedimentierten Schlamm erfolgt;
2. b) Überführen des in Schritt a) vorgereinigten Wassers in die Filtereinrichtung in welcher eine weitergehende Aufarbeitung durch eine dynamische Querstromfiltration des Wassers erfolgt und
3. c) Überführen des in Schritt b) filtrierten Wassers in eine sich an die Filtereinrichtung anschließende Umkehrosmose-einrichtung zur weitergehenden Filterung des Wassers.

A method according to the invention for processing water in a device according to the invention has the following steps:

1. a) feeding the water to be treated into the sedimentation device, wherein in this sedimentation device the water to be treated is enriched with a coagulant, in particular with a Lewis acid, in an enrichment path, in a regulation path a regulating agent which adjusts the pH of the water, in particular a lye, is added in such a way that flocculation is initiated, in particular with simultaneous precipitation of hardness formers, and finally decantation of an over stands on water from a sedimented mud;
2. b) transferring the water pre-cleaned in step a) into the filter device in which further processing takes place through dynamic cross-flow filtration of the water and
3. c) transferring the water filtered in step b) into a reverse osmosis device connected to the filter device for further filtering of the water.

In particular, the flakes formed by the coagulum form crystallization nuclei to remove the hardness formers. This shifts the precipitation equilibrium towards the sedimentation products.

The filter device described above is particularly suitable for separating the remaining solids suspended in the water.

When using two or more filter elements according to a device described above, it is advantageous if, within a container, the filter disks of the respective filter elements are moved in the same direction of rotation relative to one another when carrying out the method for building up shear stresses.

The coagulant can advantageously have a Lewis acid, in particular iron (III) chloride, and the regulating agent can have a base, in particular sodium hydroxide solution.

The concentrations of the coagulants and the regulating agent must be adjusted as part of usual dosage experiments in such a way that hydroxide-coated suspended solids containing coagulant are contained in the pre-cleaned water at the beginning of step b).

• 1 eine Prinzipskizze eines erfindungsgemäßen Verfahrens und einer Anlage, und
• 2 eine schematische Abbildung einer Filtrationsanlage zum Einsatz in dem erfindungsgemäßen Verfahren.

The properties, features and advantages of this invention described above and the manner in which they are achieved will become more understandable in connection with the following description of the exemplary embodiments, which will be explained in more detail in connection with the drawing. Show it:

• 1 a schematic sketch of a method according to the invention and a system, and
• 2 a schematic illustration of a filtration system for use in the method according to the invention.

The figure is a purely schematic representation. Actual geometric relationships may vary from the figure.

It will be on 1 Reference is made, which shows a device 2 for treating water.

The device 2 comprises an inlet 4, via which the water to be treated can be supplied to the device 2 in a flow direction 5, hereinafter also referred to as the flow direction.

The inlet 4 leads into a sedimentation device 6, in which suspended matter and the like are removed from the water to be treated. The sedimentation device 6 begins with an enrichment path 8, in which the water to be treated is enriched with a coagulant 10, also called a flocculant. Seen in the flow direction 5, a first nozzle 12 is arranged in the enrichment path 8 behind the place of enrichment with the coagulant 10, which introduces gas 14 into the water to be treated counter to the flow direction 10. The enrichment path 8 is set up in a direction of fall of the water to be treated, which is not further referenced, so that the gas 14 introduced rises against the direction of fall and mixes the water to be treated with the coagulant 10. In this way, space-intensive mixing machines can be avoided for mixing.

The problem, however, is that flocculation or precipitation begins with the mixing of the water to be treated and the coagulant 10, which from a process engineering point of view should only take place in a flocculation path 16 after the enrichment path 8. In order to avoid this premature flocculation or precipitation, there is a regulation path 18 between the enrichment path 8 and the regulation path 18, in which the flocculation is first started. In order to explain this more clearly, the coagulant 10 in the present exemplary embodiment is considered to be iron(III) chloride, which flocculates from a pH value of the water to be treated of over 7.5.

The pH value after adding the coagulant can be adjusted to a value between 4.0 and 7.3. Optionally, an acid can also be used in addition to the coagulant.

A second nozzle 20 is arranged in the regulation path 18, which introduces air 10 in the flow direction 5, the regulation path 18 being set up against the direction of fall, so that the air 10 rises with the flow direction 5 in the water to be treated. In the flow direction 5, the water to be treated is enriched in front of the second nozzle 5 with a regulating agent 22, here in the form of sodium hydroxide, which adjusts the pH of the water to be treated. The regulating means 22 is then caused by the air 10 from the second nozzle 20 in the flow direction 5 sam moves and mixes with the water to be treated and the coagulant 10, whereby the pH value of the water to be treated rises above the above-mentioned threshold of 7.5, so that the coagulant 10 begins to flocculate or precipitate. The base, here NaOH, is preferably added in such a way that the pH is between 9.5 and 11.5.

This then happens in the flocculation path 16, whereby ingredients are eliminated from the water to be treated in a manner known per se. This is basically from the DE 10 2015 106 823 A1 known and will not be explained further.

The water is then transported further through the flocculation path 16 and reaches a sedimentation basin 19, in which coagulum 10 with the bound ingredients to be eliminated from the water sink in the flocculated state as sludge 23 and can be collected in a collecting basin 24. Viewed in the direction of fall, the sedimentation basin should be provided with a funnel wall on the lower side, which faces a bottom with an angle 21 of 30° to 80°, preferably 40° to 70°, more preferably 50° to 60° and particularly preferably 55 ° can be inclined.

A sieve 26 is arranged in the collecting basin 24, through which residual moisture 27 can escape from the sludge 23. This residual moisture 27 can then be returned to the water to be treated in the inlet 4. The mud 23 can also be removed.

The remaining particles contained in the water after the sedimentation device 6 have a more compact shape and therefore a different density than would be the case if the coagulum was used exclusively or if pure NaOH was added. This can be explained by the fact that calcium or magnesium hydroxide species are formed by adding NaOH. Since coagulum-bound particles are already present at this point, these particles serve as crystallization nuclei and are covered by a calcium or magnesium hydroxide layer. This changes the specific density of the particles.

The sedimentation device 6 is then followed by a filter device 28, in which the water to be treated from the sedimentation device 6 is further filtered in order to eliminate fine particles such as bacteria and viruses from the water to be treated. An accumulation of hydroxides may also have occurred on these fine particles. Overall, the particles have a particularly small particle size with a particular specific density, which prevents settling and thus quantitative removal. The removal of these fine particles formed in the manner described above is a particular challenge of the present method according to the invention due to their particle size and specific density.

The filter device 28 with a filter medium 30 which is mounted so that it can move in a direction 32 at an angle to the flow direction 5 of the water through the filter device 28. The filter medium can basically be moved in any way, for example linearly back and forth.

However, the filter medium is preferably in accordance with the technical teaching from the publication WO 2011 033 537 A1 moves, a filter device as is known in wine filtration devices. The water flowing and filtered in the flow direction 5 is in one 1 Removed from the center of the filter device 28 in a manner that cannot be seen further and transported further. Water 34 that remains unfiltered can also be returned to the inlet 4.

The mode of operation of the filter device will be explained in more detail below 2 be explained in more detail. This filter device is designed to carry out rotation-dynamic cross-flow filtration.

The filter device 28 comprises a container 61 in which a filter element 62 is arranged.

A filter element 62 comprises a plurality of filter disks 63 and a hollow shaft 65, the filter disks 63 being arranged coaxially on a hollow shaft 65. Intermediate regions 70 are formed between the filter disks 63. The filter element 62 or at least parts of this filter element is or are rotatably arranged in the container 61.

The filter disk 63 has a fluid drainage area 72 in its interior, which extends into the hollow shaft 65. In the interior of the filter disk 63 and in the hollow shaft 65 there is a lower pressure than in the interior of the container 61, so that liquid is sucked into the interior of the container 61 and from there via an axial discharge in the hollow shaft. The wall of the filter disk 63 represents the filter membrane. The terms filter medium and filter membrane 30 are used synonymously in the sense of the present invention. The filter membrane 30 can preferably be formed from a ceramic material, in particular from aluminum oxide or zirconium oxide.

The average porosity of the filter membrane 30 for the aforementioned filtration task is between 0.06 - 0.18 mm, in particular between 0.08 - 0.12 mm.

The rotation-dynamic cross-flow filtration DCF (dynamic cross flow filtration) provides a retentate 80, i.e. concentrated sludge phase, comprising non-sedimented coagulum, bacteria, viruses and other solids and a filtrate 90 in the form of filtered water. The filtrate is preferably discharged axially from the container 61 via a fitrate discharge line 66 and the retentate is preferably discharged radially from the container through a retentate discharge line 67. If there are high solids contents, a pump 71 can be arranged along the retentate discharge, so that even a highly viscous retentate 80 can be discharged without any problems.

In order to prevent the risk of the filter medium 30 becoming clogged, the filter device 28 also has a so-called back-pulse system 68. A counter-pressure generator is used, preferably in the filtrate discharge line 66 of the filter device. This can be a piston lifting device, which generates a counterpulse through a piston movement. If this counterpulse is released into the filtrate, for example, the counterpulse is transmitted to the surface of the filter membrane due to the incompressibility of the liquid, where deposits are detached. This reduces the risk of the formation of a so-called fouling layer - i.e. a layer that reduces the filter efficiency or filter throughput.

Furthermore, one or more sensors 69, in particular a flow measuring device for flow measurement and/or a turbidity sensor for measuring the solids content, can be arranged to monitor the filter efficiency. This can be arranged along the filtrate discharge line 66. However, it is also possible to achieve both measurements using one measuring device. For example, an ultrasonic flowmeter not only measures the flow rate based on the TOF times (signal time difference when an ultrasonic signal is irradiated in and against the flow direction) but also the ultrasonic speed. This changes with the solids content in the liquid and makes it possible to monitor the solids content in the water.

Particularly preferably, both for reasons of energy efficiency and for dimensioning reasons, only one filter element 62 is arranged in the container 61, although the use of two or more filter elements would also be conceivable. With two interlocking filter elements, the liquid can shear in the overlay area.

However, a similar effect can also be achieved if one or preferably several baffle plates 73 are arranged on an inner wall to refract a flow. The baffle plates 73 can be distributed circumferentially on the inner wall of the container 61 and have a longitudinal course parallel to the longitudinal axis 100 of the hollow shaft.

The baffles 73 allow for a small tendency for a filter cake to form due to turbulence formed. This ensures a self-cleaning effect of the filter membrane.

At the same time, the above-described design of a filter device 28 only requires a low transmembrane pressure for efficient filtration, which is associated with a low energy expenditure of up to 80% compared to conventional cross-flow filtration devices.

The above-described cleaning effect is particularly favored by the fact that the rotation speed of the filter element 62 is at least 6 m/s on the outer circumference of the filter disks 63 and particularly preferably 6.1-8 m/s. These are comparatively high rotation speeds for the aforementioned filter device 28 in other applications, such as wine clarification. At a speed of more than 8 m/s, the mechanical stability of the filter disk can be affected, depending on the material of the filter membrane.

By moving the filter medium, the water to be treated can also be filtered in a significantly smaller space, so that the entire device 2 for treating the water can be accommodated in significantly smaller commercial spaces, such as restaurants. At the same time, the filter device 28 is required to prevent a downstream reverse osmosis system from blocking.

The water emerging from the filter device 28 in the flow direction 5 can now be temporarily stored in a memory 36 before it is finally pumped out of it with a pump 38 and finally filtered in a known reverse osmosis system 40 for water treatment, for example low molecular weight fatty acids to filter out. The memory 36 makes it possible to carry out maintenance work, such as rinsing operations, on the reverse osmosis system 40 without the entire system having to be switched off beforehand. It thus smoothes the water flow between the filter device 28 and the reverse osmosis system 40.

Water 42, which emerges unfiltered from the reverse osmosis system 40, can be fed to a sewer system 44 and/or the inlet 4.

The final filtered water from the reverse osmosis system 40 can then be stored directly in a collecting basin 46, from which process water 48 can then be taken, for example to operate a toilet. By adding a disinfectant 50, such as chlorine dioxide, new bacteria formation can be avoided.

Alternatively or additionally, the finally filtered water from the collecting basin 46 can be passed into a UV disinfection device 52, through which the water in the collecting basin 46 circulates. It is also possible to direct the water from the reverse osmosis system 40 into the UV disinfection device 52 directly or via an activated carbon filter 54.

Optionally, acid can be added after the filter device 28 or after the reverse osmosis system 40 to adjust the pH of the water in the neutral to slightly alkaline pH range between 7.0 and 8.5.

Reference symbol list

2

Device for treating water

4

Intake

5

Direction of flow

6

sedimentation device

8th

Enrichment pathway

10

Coagulant

11

Air

12

jet

14

gas

16

Flocculation path

18

Regulatory path

19

sedimentation basin

20

jet

22

Regulatory means

23

mud

24

collection basin

26

Sieve

27

residual moisture

28

Filter device

30

Filter medium or filter membrane

32

Directional command

34

unfiltered water / retentate

36

Storage

38

pump

40

Reverse osmosis system

42

unfiltered water/osmosis rinse water

44

Sewerage

46

collection basin

48

Industrial water

50

Disinfectant

52

UV disinfection device

54

Activated carbon filter

61

container

62

Filter element

62'

Filter element

63

Filter disc

63'

Filter element

65

hollow shaft

66

Filtrate discharge

67

Retentate derivation

68

Return impulse system

69

Sensors to monitor filter efficiency

70

space

70'

space

71

pump

72

Overlap area

80

retentate

90

Filtrate

100

Longitudinal axis

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102015106823 A1 [0052]
• WO 2011033537 A1 [0058]

Non-patent literature cited

• DIN EN 12566 [0003]

Claims (14)

Device (2) for treating water, comprising: - an inlet (4) for supplying the water to be treated, - a sedimentation device (6) adjoining the inlet (4) for sedimentation of suspended matter from the water to be treated, the sedimentation device (6) being at least - an enrichment path (8) for enriching the water to be treated with a coagulant (10) and - has a regulating path (18) adjoining the enrichment path for introducing a regulating agent (22) which adjusts the pH value of the water, and - a filter device (28) adjoining the sedimentation device (6) with a filter medium (30) which is mounted to be movable and driven by the filter device (28) in a direction at an angle to the flow direction of the water to be treated, and - A reverse osmosis device (40) connected to the filter device (28) for further purification of the water. Device according to Claim 1 , characterized in that the filter device (28) has a container (61) and a filter element (61, 61 ') arranged therein, the filter element (61, 61') having a hollow shaft (65) and one or more coaxially on the hollow shaft arranged filter disks (63, 63 '), wherein the filter disks (63, 63') have the filter medium (30) and / or consist of it. Device according to Claim 2 , characterized in that the filter element (61, 61') or at least the filter disks (63, 63') are rotatably mounted in the container (61). Device according to one of the preceding claims, characterized in that the filter disks (63, 63 ') have a fluid drainage area in their interior, which opens into the hollow shaft (65), such that the drainage of a filtrate (90) from the filter device (28 ) takes place along the longitudinal axis (100) of the hollow shaft (65). Device according to one of the preceding claims, characterized in that the filter medium (30) has an average porosity over the filter medium surface between 5 - 200 nm, in particular between 30 - 100 nm. Device according to one of the preceding claims, characterized in that the filter medium (30) is formed from a ceramic material, preferably from aluminum oxide and/or zirconium oxide. Device according to one of the preceding claims, characterized in that the filter device (28) for self-cleaning has a return pulse system (68), preferably a counter-pressure generator, particularly preferably a piston lifting device, which preferably runs along a filtrate discharge line (66) of the filter device (28). is arranged. Device according to one of the preceding claims, characterized in that the filter device has one or more sensors (69) for monitoring the filter efficiency, preferably a sensor for measuring flow and/or a sensor for measuring the solids content. Device according to one of the preceding claims, characterized in that the filter device (28) exclusively has a filter element (61). Device according to one of the preceding claims, characterized in that the container (61) has one or preferably several baffle plates (73) on an inner wall for refracting a flow. Method for processing water in a device (2) according to one of the preceding claims, characterized by the following steps: a) supplying the water to be treated into the sedimentation device (6), in this sedimentation device (6) in an enrichment path (8) the water to be treated is enriched with a coagulant (10) and a regulating agent (22) which adjusts the pH of the water is added in a regulation path (18) in such a way that flocculation is initiated and a supernatant of water is decanted from a sedimented one Mud (23) occurs; b) transferring the water pre-cleaned in step a) into the filter device (28) in which further processing takes place through dynamic cross-flow filtration of the water and c) transferring the water filtered in step b) into a reverse osmosis following the filter device (28). -Device (40) for further cleaning of the water. Procedure according to Claim 11 , characterized in that the coagulant (10) has or consists of a Lewis acid, in particular iron (III) chloride, and that the regulator agent has or consists of a lye, in particular NaOH. Procedure according to Claim 12 , characterized in that the addition of coagulant (10) and regulating agent (22) in step a) takes place in such a way that pre-cleaned water supplied to step b) contains hydroxide-coated suspended matter containing coagulant. Method according to one of the preceding claims, characterized in that the filter device (28) exclusively has a filter element (61) which rotates at a rotational speed of at least 6 m/s on the outer circumference of the filter disks, in particular at a rotational speed of 6-8 m/s.

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