DE1767497C3 - Device for the biological cleaning of polluted water in ponds - Google Patents

Description

The invention relates to a device jut biological purification of polluted water in ponds with a arranged in a line on the pond sole, across the pond extending air injection.

Large ponds are often used to clean polluted water. It is known that the water in the pond must be circulated in order to err the formation of stratification of the water. Prevent the pond. When the water stands still and layers form, putrefaction and fermentation processes develop, which are easily recognizable by gas bubbles rising from the water and, due to the gases developed, lead to a very strong odor nuisance or air pollution. When cleaning polluted water in ponds, a number of biological and / or chemical processes take place, and sediments are precipitated out of the water and settle on the bottom or bottom of the pond.

So far, sludge accumulation in ponds or basins has been avoided; because it turned out to be right fears that putrefaction and fermentation processes will develop in the sludge.

The circulation of the water in the ponds is intended to ensure that this is also directly at the The water in the pond bottom is brought to the surface and thus brought into contact with the oxygen in the air will. A known measure to achieve a circulation of the cleaning in the pond Water is a natural by the pond to pass flowing water through it. Here However, there is a very high risk that uncleaned water will get into flowing water and stir it with it will. In addition, the circulation of the water remains in a relatively narrow area on both sides the flow path of the water is restricted. Known devices for cleaning soiled Water in ponds are in the form of agitators. Rotors or other mechanically driven Facilities trained. A mechanical circulation of the water is sought with them. However, practice has shown that devices of this type can only be used at a very high cost can be created and operated. Despite this effort, the upheaval achieved only remains ai.f ..a relatively narrow area around the jcv .'.- iMgen device limited. It was too otherwise try to pass through those areas of the Te.che that are not affected by the upheaval Blowing in air to be enriched with oxygen Here, too, it has been found that the putrefaction finds Fermentation inhibiting effect on a relative he remains restricted in the area.

Finally, devices of the type mentioned at the beginning for pond basins have become known (USA Patent 3? 34Ι2Γ ·), in which in dei

»5 level or near the level of the pond parallel IcI mutually extending distribution pipes for zuzu leading pressurized air are arranged to cause an upward flow of the liquid above the pipes and to achieve intense contact with the oxygen in the air while between adjacent tubes a downward flow is to be generated, so there are practically two between two adjacent pipes Circulating circulatory currents arise. In the floor area, the paral'el to each other takes place.

ongoing downward currents of neighboring circuits cause a sedimentation of the suspended solids, which are not can be avoided, because by deflecting the flow In the direction parallel to the bottom of the pond corner, a dead space in terms of flow is created. the of the one. generated an air supply pipe Circulating flow of the water to be cleaned is locally very narrow, so that it is used to capture the entire pond volume is necessary, a large number of such air supply pipes parallel to each other to be arranged in the area of the pond floor. Kicrrfürcb c-there is a very great expense sownhl structural as well as of an operational nature. Only relatively low flow velocities can be achieved achieve, with part of the flow

so mung energy is still consumed by the fact that in each case above the air inlet pipes at cierTeiehoberfluche V-all formations occur and at the 1 calibrate the neighboring circulating currents are opposed to each other.

rö E ^ i ErHsdtisg lieo * is now based on the task a rubbing mg of those mentioned above that can be created and operated at low cost Art to create with which, while avoiding fluidic dead spaces, an intensive

6a Umiaufstromuhg is achieved in the pond.

In order to solve the above-mentioned problem, the execution mentioned is characterized according to the following: that above the air injection device there are two vertical, slightly spaced apart, parallel to each other and the Pond through-filing guide walls are arranged, the hard above the pond floor a horizontally Continuing and in the vicinity of the water spike

3 4

gels above the structure formed by the guide walls

vertical shaft deflection elements for cutting through the new facility.
Conversion of the buoyancy currents generated in the shaft The device shown in the figure to rhyme ·

The transformation of the water into a surface current due to polluted water in ponds shows

point. _{5 au} f htstehende arranged parallel _rec

The air blowing device with the vertical shaft formed by the guide walls I, which extend linearly over the guide walls, extends over the entire width of the pond and between the device works according to the principle of a Mam-a shaft! limit. The upper end of the mut pump, which, however, differs from the shaft 2, is located at a distance below the previously known use of such pumps to the water level 3 in the pond. Above this upper / um Hochfordnrn of liquid-solid semi- end of the shaft 2, deflecting elements 4 are arranged exclusively to achieve an intensive, which ensure that the water flowing in the direction through the shaft in the rising circulation of the water to be purified in the pond serves . Through which the pond is deflected.
The baffles will create a uniform. At the lower end of the shaft 2 is an influx of air in the area of the pond shell eiy-spi -nd the blower? in the form of several parallel verlaiiunmittelbar above the pond sole \ _"Π η & [ ':... are provided _κ water fender tubes formed at an air conveying Reinin the of the baffles shaft einge- device (not shown) so that aspirates. Umlenkelemt ite arr "b; the end of the ao air is ejected in the direction of the arrows 8 shaft prevent an A .. · violence of the water flowing upwards through the blowing of air into the shaft 2 and lead to a Mainmut pump effect.
At the lower end of the shaft, the leading water also dn the pond surface Flow velocities and thus a parallel to the pond area IO. Between the si hnclle circulation and at the same time an intensive pond shell 10 and the continuations 9 of the guide aeration of the water to be purified. Inflow cross-sections II extend through the walls I, and the uniform parallel flow at the bottom of the part is so narrow that deposits cannot occur in these areas due to the relatively high flow area. The flow rate of the settling of light suspended matter is indicated by arrows 12 in the figure. Which prevents. Due to the mammoth pump effect can be continued 9 of Leitwande 1 and the formation of the new device even in these ponds of the cross section of the Zuströmquerschnitte 11 bewirmit large to overflowing base surfaces user-ken common that the water immediately above the ^<len · _ ₃₅ pond sole IO contained the Pond in

In a preferred development of the new a relatively thin layer in the direction of the

Devices are set in motion to increase the air supply,
Above the pond floor outside the continuation of the In the area of the inlet openings of the inflow

additional cross-sections 11 are additional air injection devices

Air blowing devices provided. 40 lines 14 provided in the form of tubes. Through

It is advantageous if, according to another, these additional air injection devices 14 are used

Further development of the invention swimmers for the increased oxygenation of the water

Deviating elements provided near the water level.

mentc are provided. With this float, in a practically realized implementation of the

the Umlcnkciemente to drop on the respective water ₄₅ device, the pond a depth of about 3 m

serspii'gsl automatically, so that occurring "on. At such a depth the air intake can

Fluctuations in the water level not to a blower 7 or 14 to a conveying air fan

Functional impairment of the new facility. It was found that

to lead. even in ponds with a very large area

One embodiment of the invention is a complete revolution in a very short time.

Drawing reproduced. _{Zung H, it} was possible to achieve water.

1 sheet of drawings

Claims (3)

Patent claims: 1. Device for biological purification of polluted water in ponds with one arranged in a line at the bottom of the pond, across air blowing device running through the pond, characterized in that above the air injection device (7) two vertical, arranged at a small distance from one another, running parallel to one another and the pond dividing guide walls (1) are arranged, which are hard above the pond floor (10) a horizontal continuation (9) and near the water level (3) above the vertical shaft (2) LJmlcnkelemente (4) formed by guiding walls for conversion the upwelling flow of the water generated in the shaft (2) into an open air flow exhibit. 2. Device nSw'i claim 1, characterized in that that hard above the pond bottom (10) outside the continuation (9) of the guide walls (1) dividing the pond additional I.ufteinblasvorrichtungen (14) are provided. 3. Device according to claim ί or 2, characterized by floats for d ^; e deflection elements (4) provided in the vicinity of the water level (3).