DE202012011112U1 - Device for cleaning polluted rainwater or the like in the street drain (drain) - Google Patents

Abstract

(9) Water treatment device, sludge bucket characterized in that for the treatment of dirty rain water or the like, a treatment room is provided for passing the rain water, the eco-sludge bucket (2), at the bottom drainage holes (12) receives, mainly holes and as emergency drain on upper support ring at least two slots (13) gets.

Description

The invention relates to a device for the treatment of polluted rainwater or the like, in the street drain (Gully), according to the preamble of claims 1 (9) to 5.

Rainwater, which runs off traffic areas, is waste water.

With sufficient space, the cleaning of the water in the street side space on a greened surface, cost-effective.

For the inner-city area and small space, trough and regions offer percolation.

The use of water-permeable surface coverings, allows the direct infiltration of the resulting rainwater, but with extremely low cleaning performance.

In cramped areas, a special trough filled with substrate is installed in the gutter. Here, the retention of sediments, mining of heavy metals and the resulting water is seeped directly underground. This procedure is very expensive.

On inner-city access roads, with sidewalks and high board, the rainwater is usually detected with street entrances and fed into the rainwater sewer and derived by the shortest route in a receiving water. A cleaning does not take place here.

There is a device, seen from the utility model protection font DE 20 2009 011 400 U1 , Filter for insertion into an existing street drain, for cleaning of incoming surface water (0010) The filter basket should be flowed through radially inwards (0011). The inner annulus is peripherally filled with a filter material concentric around a central drain (0028). A practical test has shown a very low hydraulic performance. The filtration of mineral, fine-grained suspended matter is below 50%. The maintenance and the acquisition costs are very high. The water contact time is very low. The cleaning performance, at least the biological pollution is barely detectable.

The best cleaning would be to send all the rainwater through a proper wastewater treatment plant and purify it there.

Out DE 29 44622 C2 a device is known which finely distributes the water in the street side space and then seeps into the ground via a greened depression.

Out DE 4403 454 C1 a method is known, which cleans the surface water by the use of special wells in Gossenbereich, filled with substrate, and is seeped directly into the ground. The water contact time is very low.

Out DE 697 17 621 T2 describes a method for the treatment of run-off rainwater. It is stated that the device consists of a modular basket (0001) and several parts (0026). In the correspondence wastewater waste 5/12 a practical test is published. Here, it has been determined that such baskets with new bed have a hydraulic performance limit below 1 l / s. This also applies to the device DE 20 2009 011 400 U1 , A drainage area of 300-500 m ^{2 is} connected to each street inlet, which corresponds to a discharge rate of 3.3-10 l / s depending on the rain event. The problems are described after a prolonged dry period (0005), the drying of the bed. As a result, the microorganisms die, a vaccination of the water is no longer possible. Shown is a flow restrictor (0029) for controlling an initial flow rate. The drain rate must correspond to a mean rainfall event and not be limited for quick removal of the water from the traffic areas. Here, the risk of clogging by leaves, paper, etc. is detected. The use of peat, sand, compost or the like in the bed is a biologically inactive material and does not cause a reduction in volume to make room for long term, further deposits of substances. The used compacts or pellets made of compost (0032) should prevent blockages in the bed. The opposite is the case, these pellets dissolve after a few hours and clog the drainage channels in the bed. The aforementioned practical test shows that such Schüttugen after a short period of operation sludge and must be reactivated with high cleaning or replacement bed again. Use should be made of active carbon and zeolite. Exposed, active carbon, or the like, is populated after a short time and then ineffective. This mode of action is from experiments according to the method DE 4403 454 C1 known. A Naturstoffummantlung of carbon or the like is not reported. A more extensive, biological treatment of the water does not occur in this process.

In DE 101 52 671 A1 a granulate and process and plant for the purification of contaminated rainwater is shown. This is a pure infiltration system, comparable to the patent DE 29 446 22 C2 (1979) , The granules are "not" exchangeable by the vegetation. This method is not comparable to the patent application.

Out DE 1 658 215 A is a road drain with grate inlet and side inlet, visible. It is merely an enlarged inlet surface created and increased the ability to swallow the entire process.

In DE 25 44 255 A1 is described a device for supporting a mud bucket in the upper part of a Bodeneinlaufes, through a ring which has lateral tabs. It is a device mainly intended to be used in existing floor drains of older type.

In the utility model DE 87 06 073 U1 is a closable street drainage with a funnel-shaped insert described to prevent the ingress of polluting liquids in the sewer network. A cleaning of the water is not described.

Out DE 20 2006 006 753 U1 is a filter insert for street inlets for receiving and discharging surface water with a multi-stage filter cartridge, known.

The introduced water should flow successively alternately, in opposite directions, radially through the filter cartridge. The floor is closed. To extend the maintenance times and to increase the filter throughput vertically extending folds or waves are formed on the filter walls.

• a) Einen erheblichen Wartungsaufwand.
• b) Mehrmalige Reinigung pro Jahr, sonst Verstopfung.
• c) Bei der Reinigung mit Spritzwasser wird der Schlamm und sonstige Rückstände in die Regenwasserkanalisation gespült.
• d) Benötigen eine relativ große Bautiefe des Straßeneinlaufes.
• e) Die Wasserkontaktzeit mit möglichem Substrat ist sehr gering.
• f) Eine biologische oder und chemische Reinigung erfolgt nicht.
• g) Wegen der Ausführung mehrerer Bauteile in Edelstahl, entstehen sehr hohe Kosten.
• h) Umständliche Handhabung in der Praxis.
• i) Komplizierte Bauweise.
• j) Der Querschnitt des Straßeneinlaufes wird immer eingeengt, deshalb Reduzierung der Wasser-Ablaufzeit.
• k) Bei Starkregen Ausspülungen, dazu geringe Oberfläche.
• l) Wenig, oberer Platz für Grobstoff-Ablagerungen.

From the US 5, 507, 944A is a multi-stage filter arrangement is known, which flows through the water one behind the other, alternately, radially.
These filter systems all have the following disadvantages:

• a) A considerable maintenance effort.
• b) Repeated cleaning per year, otherwise constipation.
• c) When cleaning with spray water, the sludge and other residues are flushed into the rainwater sewer.
• d) Need a relatively large depth of the street inlet.
• e) The water contact time with possible substrate is very low.
• f) Biological or chemical cleaning is not carried out.
• g) Because of the execution of several components in stainless steel, very high costs.
• h) Cumbersome handling in practice.
• i) complicated construction.
• j) The cross section of the road inlet is always restricted, therefore reducing the water drainage time.
• k) In heavy rain rinses, with a small surface.
• l) Little, upper place for coarse deposits.

The Bern University of Applied Sciences, 2504 Biel, has developed a sludge collector with a geotextile filter bag for the retention of road wastewater ingredients. When new, the geotextile sack has a large flow rate. This drops relatively quickly to a value of about 0.06 l / per square meter / minute as a result of the occupancy with fine wastewater constituents. Practical tests have shown that in heavy rain, the bag contents are flushed out and thus this again gets into the rainwater sewer.

The invention is now based on the object to provide a method and apparatus for the treatment of contaminated rainwater or the like, wherein in the eco-sludge bucket ( 2 ), a simple and effective pre-treatment of the water takes place and the rainwater channel is also used as a sewage treatment room. The entire process and the devices are practical and inexpensive.

• – Straßenbreite im Mittel 6 m (inklusive Fußweg, Parkplätze usw.)
• – Straßenlänge (Anschlusslänge) im Mittel alle 40–50 m.
• – Einzugsfläche pro Straßeneinlaufes rund 300 m².
• – Bei einer Regenspende von im Mittel 110 l/s × ha (ohne Abschlussbeiwerte) errechnet sich eine Ablaufmenge von rd. 3,3 l/s.
• – Diese Einlaufmenge ist unterschiedlich, je nach Regenereignis und der angeschlossenen Einzugsfläche.

Die baldige Ableitung des Niederschlagswassers von der Verkehrsfläche ist aus Sicherheitsgründen notwendig. Dies wird erfinderisch dadurch gelöst, dass der Querschnitt des Straßeneinlaufes (Öko-Schlammeimers) nicht eingeengt wird. Verwendung finden modifizierte PE-Schlitzeimer gemäß DIN 4952 .The area connected to a street entrance is according to the regulations:

• - street width on average 6 m (including footpath, parking lots etc.)
• - Road length (connecting length) on average every 40-50 m.
• - catchment area per street entrance around 300 m ² .
• - With a rainfall of an average of 110 l / s × ha (without completion coefficients), an outflow of approx. 3.3 l / s.
• - This amount of intake varies, depending on the rainfall event and the connected catchment area.

The rapid discharge of rainwater from the traffic area is necessary for safety reasons. This is inventively achieved in that the cross section of the street inlet (eco-Schlemmimers) is not restricted. Use find modified PE slot buckets according to DIN 4952 ,

This run-off from the paved catchment area, polluted rainwater is collected in the gutter and following the longitudinal gradient of the road, the street inlet ( 1 ). The water enters the eco-sludge bucket ( 2 ) penetrates vertically the natural product chaff ( 4 ), then runs prepurified through the walls of the jute Fabric bag ( 3 ), through the slots and bottom drain holes ( 12 ) in the process ( 7 ) to the rainwater channel. Subsequent rinsing of already deposited substances, by the maximum possible surface of the walls of the tissue bag ( 3 ) and the eco-sludge bucket ( 2 ) avoided.

The eco-sludge bucket ( 2 ) is modified from the normal form only to the extent that it at the bottom drain holes ( 12 ) (mainly holes) and at the upper support ring an emergency overflow in the form of slots ( 13 ) receives. If the solid components such as leaves, wood, cardboard, paper or similar, grow so far that the peripheral overflow openings are closed in the sludge bucket, excess water flows through the slots ( 13 ) on the outside walls of the sludge bucket ( 2 ) in the rainwater channel. In the bottom of the eco-sludge bucket ( 2 ) drain holes ( 12 ), will be used later, short slotted tubes and tested to create an additional sludge-heel zone, thus preventing blockages and maintenance.

The natural product chaff ( 4 ), should primarily consist of wax-free, mechanically shortened, reduced and squeezed, natural materials (mainly straw). This so treated straw has a thickness of 0.3-0.5 mm. The smallest, standardized mud bucket has a diameter of 32 cm and a usable height of 28 cm. The cross-sectional area is (0.32 m × 0.32 m × 3.14): 4 = approx. 0.08 m ² . At a height of the straw squeezed into the jute sack, 0.28 m is calculated: 0.0005 m = approx. 560 layers. The usable area (contact area) is calculated from the cross-sectional area rd. 0.08 m ² × 560 layers = 44.80 m ² . Less 30% pore volume (stored wood chips, heather chaff) 44.80 m ² - 13.40 m ² = approx. 30-35 m ² . In the inventively proposed eco-sludge bucket ( 2 ) with a usable filter height of approx. 45 cm, this contact surface is much larger. Salts, phenols, heavy metals, polycyclic aromatic hydrocarbons and filterable substances can be bound via this surface (unreachable with granules and fill). The water contact time is very long due to this surface. Finer sediments such as dusts and sand are retained on the finely deposited surface.

The natural product chaff ( 4 ), natural product pellets ( 5 ), in percentage, mainly consisting of straw substances, admixtures of limestone granules, activated carbon and other substances, which are specifically tailored to the pollution of the present rainwater. At bedding the activated carbon is exposed, quickly populated and then ineffective after a short time. Inventively, this problem is solved in that the natural product pellets ( 5 ) with a natural substance, especially paraffin, coconut oil or the like are converted and the ingredients are released slowly, over a long time.

The natural product chaff ( 4 ) are mixed with dried bacterial cultures in order to measure the passing precipitation water with microorganisms ( 12 ) to allow biological and chemical purification later in the rainwater channel. It is known from the prior art that on smooth surfaces, biological turf can hardly form or hold. This also applies to granulate beds. Straw has small depressions in the inside and a rough surface, where microorganisms can last for a long time. Beds dry out, the natural product chaff ( 4 ) keeps the fluid for many weeks.

The treated water penetrates through the walls of the Jutegewebesackes ( 3 ) and passes through the wall slots and the bottom openings ( 12 ) and thereby sediments above the fabric bag ( 3 ) held back. The fine layering of the natural product shred ( 4 ) guarantees the deposition of coarse, filterable substances, above the stratification. The reduction in the amount of natural product chaff ( 4 ) over one year of use, due to the inflow of nitrogen from the polluted rainwater. The natural product chaff ( 4 ) composted. So over time, in the upper area of the tissue bag ( 3 ), Space created for Coarse Deposit. With a granulate bed this is not possible.

At the annual cleaning (or more often) the eco-sludge bucket ( 2 ), as usual, caught with a hook and dumped the contents on a truck. In this simple process, the complete, filled jute tissue bag ( 3 ) in a single operation with removed. Before re-use in the street entrance ( 1 ) receives the eco-sludge bucket ( 2 ) a new fabric bag ( 3 ) with a new filling and is used again without additional work. The used, soiled fabric bag can now be further processed without problems on the composting composting. Granules or filter cartridges are hazardous waste after use or must be cleaned on site with high pressure water. The entire dirt runs back into the rain channel during cleaning.

The thus pre-cleaned and vaccinated water now passes through the drain ( 7 ) in the rainwater sewer. There it gets through the devices ( 10 ) V1, V2 and V3 dammed and degraded biological contaminants. The basic process ( 14 ) guarantees a swirling and thus entry of Atmospheric oxygen for the further biological and chemical degradation of contaminants. Inventively, this problem is solved in such a way that the basic sequence ( 14 ) is designed primarily as a circular section. Due to the accumulated water arises at the bottom of the drainpipe in the inspection shaft ( 9 ) a high flow rate and turbulence of the water. The deposition of possible residual sediments is avoided. This is achieved because each rainwater channel must be built with a sufficient slope.

According to the regulations, a rainwater sewer system must start with a pipe inside diameter of 300 mm. With an inlet volume of 3.3 l / s per road inlet, the connection capacity of approx. 20 street entrances. This theoretically results in an activation basin of 74 cubic meters. The residence time is approx. 5-7 h, depending on the gradient of the pipeline. According to the state of the art, so far no method, after passing through the water through a filter or bed, can achieve biological and / or chemical purification.

Through the basic process ( 14 ) ensures that the entire pipeline drains slowly until the next rain event. If a heavy rain suddenly occurs, the float ( 15 ), or the weight ( 16 ) the entire device ( 10 ) by buoyancy and give the pipe cross-section completely free. In the complete failure of the float ( 15 ) or weight ( 16 ), the water accumulated in the line, in the inspection shaft ( 9 ) the entire device ( 10 ) V1, V2 and V3 flood. This ensures that a backwater in the land connections, not done. According to the regulations, land connections are always connected above the inspection bay berm.

An advantageous side effect of the invention is that a rush of water is damped in the receiving waters and rivers, because the rainwater is stowed in the initial stanchions of a rainwater sewerage. Biologically stabilized sludge passes through the pipeline (main collector) into the sand trap located in front of the receiving water and can be easily extracted there.

By choosing standard mud buckets and inexpensive natural products, the entire process with the devices is very inexpensive.

Further advantageous measures are described in the subclaims.
The invention is illustrated in the accompanying drawings.

LIST OF REFERENCE NUMBERS

1

street running

2

Eco-mud bucket

3

Jute fabric bag

4

Natural Product chaff

5

Natural Product pellets

6

microorganisms

7

Drain rainwater channel

8th

Rainwater drains

9

Rainwater manhole

10

Devices V1, V2 and V3

11

deleted

12

drain holes

13

Slits, emergency overflow

14

basic flow

15

swimmer

16

Weight

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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 202009011400 U1 [0008, 0012]
• DE 2944622 C2 [0010, 0013]
• DE 4403454 C1 [0011, 0012]
• DE 69717621 T2 [0012]
• DE 10152671 A1 [0013]
• DE 1658215 A [0014]
• DE 2544255 A1 [0015]
• DE 8706073 U1 [0016]
• DE 202006006753 U1 [0017]
• US 5507944A [0019]

Cited non-patent literature

• DIN 4952 [0022]

Claims (5)

(9) water treatment device, sludge bucket characterized in that for the treatment of polluted rain water or the like, a treatment room is provided, for passing the rainwater, the eco-sludge bucket ( 2 ), bottom drainage holes ( 12 ) receives, mainly holes and as an emergency drain on the upper support ring at least two slots ( 13 ) gets. Water treatment device according to claim 1, characterized in that at the bottom of the sludge bucket ( 2 ) Slotted tubes ( 14 ) are installed. Water treatment device according to claim 1, characterized in that the natural fabric bag ( 3 ) is filled with natural product chaff ( 4 ) in the eco-sludge bucket ( 2 ) is inserted. Water treatment device according to claim 1, characterized in that the entire device consists of the eco-sludge bucket ( 2 ), the jute tissue bag ( 3 ) the natural product chaff ( 4 ), the pellets ( 5 ) and the microorganisms ( 6 ) Water treatment device according to claim 1, characterized in that the complete eco-sludge bucket ( 2 ) preferably in street inlets ( 1 ) Gullies, is installed.

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