DE102006015926B4 - wastewater treatment plant - Google Patents

Abstract

Small wastewater treatment plant with positioned therein units, in particular a pump and an aerator, which are fixed in height adjustable, characterized in that one unit or more units are arranged floating and with a sliding tube (2) and this sliding tube (2) in a Gleitrohrführung (6 ) is arranged adjustable in height and further an aggregate, such as a pump and / or a floating aerator (1), with a floating body (5) is fixedly connected and above the sliding tube (2) with a molded part (11) and a T-shaped part (12) the sliding tube (2) is connected transversely and at the T-shaped part (12), the entry of the air flow occurs.

Description

The invention relates to a small wastewater treatment plant with units positioned therein, in particular an aerator and a clear water pump.

Such sewage treatment plants are preferably used where the connection to a public sewer system is not possible or uneconomical. Depending on the type, the sewage treatment plants are dimensioned according to the type for a maximum number of inhabitants, that is, the volumes of the chambers and the performance of the aggregates are prescribed.

However, problems arise in practice in that these sewage treatment plants are often oversized due to the above-mentioned legal requirements, namely, when dirty water is supplied by a smaller than the maximum possible population.

Due to the installed aggregates, which are positioned at a certain level, in any case a given large amount of dirty water is ventilated, no matter how much is actually fed.

This relatively large amount of water to be aerated results in the operation of the aerator to a high energy consumption, which, since sewage treatment plants are in continuous operation, can reach a significant size, with the corresponding economic disadvantages.

In addition, the small amount of dirty water supplied with a reduced number of users to an underload, resulting in greater problems in terms of microbiological degradation. This is mainly because there is a low nutrient supply for the microbes due to the reduced input of waste water, which leads to a corresponding inefficiency of the entire process.

A utility model is known DE 203 12 893 "Small sewage treatment plant", where the corresponding aggregates in the small wastewater treatment plant can be mounted in height adjustable manner via clamps on an intermediate wall. The sewage treatment plant with at least one chamber and several units positioned therein, in particular a clear water pump and an aerator, is characterized in that the aggregates are arranged adjustable in height via a fixed support on an intermediate wall. The disadvantage of this technical solution is given by the fact that an influence on the user sizes is taken only by a fixed installation of the height adjustment of a particular unit.

Furthermore, a utility model is DE 20 2004 000 669 "In a small wastewater treatment plant with at least one pelvic body insertable liquid treatment device" known, wherein a float is arranged to float with a corresponding pump via a lifting system. In this case, a device is provided which has a placement of this float or pump system with the lever arrangement on a corresponding wastewater treatment plant wall. This arrangement is unstable and has no tight fit against the sewage plant wall, which is a disadvantage of the prior art.

Furthermore, a European patent application EP 1 612 191 "Fully biological small sewage treatment plant according to the SBR process with reactor tank integrated in the primary clarifier" given, which discloses a simple suspension via a pipe system with an aggregate. This technical solution has the same disadvantage of the prior art, as an unstable storage of the floating unit is present.

A publication DE 21 39 343 A "Plant for the biological purification of waste water" has a floating aggregate, which is arranged within a container. Here, the same disadvantage of the prior art is given, since no firm locking of the unit is present as a floating organ.

The present invention has for its object to develop a small sewage treatment plant of the generic type so that their operation is performed optimally regardless of the supplied amount of dirty water below a predetermined maximum value and the disadvantages of the prior art are excluded.

According to the invention the object is achieved in that a small wastewater treatment plant according to claim 1 is signaled.

With this structural design, it is now possible to adapt the small sewage treatment plant to the conditions, that is, to realize their operation according to a modified wastewater attack by the respective optimized position of the aggregates.

By means of the floating height adjustability of the aggregates, preferably in each case separately, a reduction of the biological quantity to be ventilated can be achieved, for example, so that a reduced volume is biologically clarified in corresponding time intervals and according to the amount of wastewater actually accumulated. This smaller amount leads to an optimization of the microbiological degradation, since for the microbes, based on the volume of the water to be purified, a sufficient food concentration is present.

The adjustment of the units in the form of the floating design to the ideal to be considered sewage volume also leads to a reduction in operating costs, since, for example, due to the smaller amount of waste water to be ventilated a correspondingly low energy consumption of the aggregate aerator is given.

Since such small wastewater treatment plants, as mentioned, operate practically in continuous operation, an adaptation of the operating time or the operating life of the units used and the optimal position of the units to the actual requirements in economic terms is of particular importance.

A particularly advantageous embodiment of the invention is given by the fact that each unit is attached via a separate holder with a holding clamp and a Gleitrohrführung and the corresponding sliding tube in conjunction with a float and example, the respective unit is arranged clamping a clip on the holding device of the small wastewater treatment plant , The holding device can be, for example, in single-chamber sewage treatment plants, an upper cross-ring or a stainless steel cross-member. In multi-chamber sewage treatment plants an intermediate wall is given.

This retaining clip is placed in connection with mounting clips on the predetermined holding device of the wastewater treatment plant. About appropriate clamps a Gleitrohrführung is arranged. In this Gleitrohrführung a corresponding sliding tube is now arranged, which changes in height adjustable movable depending on the content of the small wastewater treatment plant. The sliding tube is given in conjunction with the unit and the attached float. Above the sliding tube on corresponding moldings, the unit supply is performed.

The invention will be described below in the context of an embodiment with reference to the accompanying drawings. Show it:

1 Side view of floating aerators with fixing units

2 Top view of a corresponding aggregate holder

3 Front view of an aggregate holder

4 Design of a float

SBR is the abbreviation of "sequencing batch reactor", literally meaning the "consecutive stack reactor". The SBR treatment plant runs in the steps of primary clarification, activation and secondary clarification, with activated sludge and secondary clarification tanks not being spatially separated. In this combined pool (SBR reactor), the actual biological wastewater treatment takes place. In the SBR reactor, the functions of activated sludge tank and secondary clarification are separated in time. The corresponding temporal and functional sequence is called a cycle.

• – Beschickungsphase
• – Belüftungsphase
• – Schlammabzug
• – Absetzphase, Sedimentationsphase
• – Abzugsphase.

The wastewater treatment takes place in 5 phases:

• - Loading phase
• - Ventilation phase
• - Sludge removal
• - settling phase, sedimentation phase
• - Deduction phase.

During the aeration, settling and withdrawal phase, the wastewater feed must be stored. This can be done systemically in the primary treatment or in a separate buffer tank. The ventilation takes place according to the injector principle in a so-called pause run time interval. The cycle time in each of the individual phases is 8 hours, so that there are 3 cycles per day. The resulting excess sludge in the SBR reactor is pumped into the primary treatment and disposed of at regular intervals with the primary sludge.

In the following recording of the embodiment, in particular the possibility of variable design of Gleitrohrführung and the sliding tube is shown in conjunction with a floating aerator.

Fully biological wastewater treatment in the SBR process requires the supply of oxygen to achieve the prescribed cleaning values. This oxygen supply in wastewater is usually realized by the use of injector or compressors.

The prior art shows that the aerator is rigidly attached to the sewage treatment plant wall but variable in each case to the current water level. Due to this rigid construction, the aerator has not worked up to now depending on the water level within the sewage treatment plant. This can lead to a reduction in the volume of air to be introduced and a reduction in the cleaning performance of the sewage treatment plant with increasing water level.

• – Erhöhung des Luftvolumenstromes und dadurch höherer O₂-Eintrag
• – Steigerung der Abwasserreinigungsleistung
• – verbesserte Konstanz der Reinigungsleistung
• – Senkung der Betriebskosten durch Verringerung der Lüfterlaufzeit
• – komfortablere und schnellere Einstellbarkeit des notwendigen Anlagenvolumens bei Inbetriebnahme der Kläranlage
• – Reduzierung des Geräuschpegels bei Belüfterbetrieb

To overcome this problem, the inventive solution of the floating aerator has become 1 developed. In this system, the previous rigid structure with certain attachment points on the intermediate wall in a Gleitrohrführung 6 and is using a float 5 always kept at the same level of the water level to be changed. The air volume flow to be entered is carried out very constantly in this way. The advantages of this floating arrangement of an aggregate, for example, the floating aerator 1 , are given as follows:

• - Increasing the air volume flow and thus higher O ₂ input
• - Increase the wastewater treatment performance
• - improved consistency of cleaning performance
• - Reduced operating costs by reducing the fan runtime
• - More comfortable and faster adjustability of the necessary system volume when commissioning the sewage treatment plant
• - Reduction of the noise level during aerator operation

Like from the 1 . 2 and 3 can be seen, is the corresponding floating aerator 1 below the sliding tube 2 arranged. On the floating aerator 1 is a float 5 , which in a particular embodiment according to 4 is shown with the help of a stainless steel screw 8th and an overlying plastic rail 7 placed. The sliding tube 2 which is inside a sliding tube guide 6 on both sides of the retaining clip 4 is present, has a possible horizontal movement of 280 mm. This is the floating aerator 1 used as injector fan Oxy-Jet KD-180 from DAB. The sliding tube 2 changes according to the water level. The required volume of the float 5 , made of Styrodur, has been designed to carry the conventional ventilation design in the water. The attachment of the float 5 done by means of a plastic rail 7 that is centered over the float 5 placed and with a stainless steel screw 8th on the handle of the floating aerator 1 is screwed. The floating aerator 1 is designed so that it has a freedom of movement of 280 mm when installed. By means of the retaining clip 4 the aerator will connect with the clamps 3 on the sliding tube guide 6 placed on the intermediate wall located in the container.

During commissioning, the aerator floats by ¾ of the float height due to the drive effect of the ventilation screw and achieves the optimum air intake height. This height is maintained with increasing water level, which inevitably sets by the charge from the primary treatment, up to 280 mm, as the floating aerator 1 now able to ascend with the water. The entered air volume flow always remains constant. The entry of the air volume flow via the molding 12 on the sliding tube 2 ,

The 2 shows a plan view of the floating aerator 1 with the attached float 5 ,

The same goes for the 3 , where here is a front view is designed.

Like from the 4 it can be seen, is the float 5 arranged so that it fits through a lateral radial molding on the sliding tube 2 can be added.

These constructive features, as in the floating aerator 1 according to the 1 to 4 shown, can now also be carried out for other aggregates such as a clear water pump or a feed and slurry pump. The respective constructional relationship between the float 5 and a corresponding unit is executed depending on the construction of the unit.

Basically, the structural design of the unit remains on a sliding tube 2 within a sliding tube guide 6 and a retaining clip 4 given. This ensures that the respective unit, such as the floating aerator 1 , always in optimal condition for clarification.

LIST OF REFERENCE NUMBERS

1

floating aerator

2

slide tube

3

mounting brackets

4

retaining clip

5

float

6

Gleitrohrführung

7

Plastic rail

8th

stainless steel screw

9

Gleitrohrführungsverbinder

10

T-molding

11

molding

12

T-molding

Claims (1)

Small wastewater treatment plant with positioned therein units, in particular a pump and an aerator, which are fixed in height adjustable, characterized in that one unit or more units arranged floating and with a sliding tube ( 2 ) and this sliding tube ( 2 ) in a sliding tube guide ( 6 ) is arranged adjustable in height and also an aggregate, such as a pump and / or a floating aerator ( 1 ), with a float ( 5 ) is firmly connected and above on the sliding tube ( 2 ) with a molded part ( 11 ) and a T-shaped part ( 12 ) the sliding tube ( 2 ) is connected transversely and on the T-shaped part ( 12 ) the entry of the air volume flow takes place.

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