slider-bg An individually designed know-how product: also for your wastewater treatment plant always at the optimum!

No matter if new construction or refurbishment - every single adapt-installation is individually adapted and optimized by hydrograv to the conditions of the plant. Regularly with several hundred flow simulations (CFD) per installation. In this way we achieve the maximum benefit for the operation and for the environment: the highest possible performance reserves for secondary treatment with the lowest effluent values of filterable substances (AFS), total phosphorus of the treatment plant and COD.
hydrograv adapt 2.0 - new addition: the phosphorus elimination ring - PER

Already since the first installation more than 10 years ago hydrograv adapt stands for two impressive advantages: More capacity for the secondary clarifiers and at the same time clean water in the outlet. Since 2018 the adapt system has been proving that very good things can also be improved: since then the patent-pending phosphorus elimination ring - PER - ensures that even clearer water flows out of the tanks. Already in use at several plants, for example in Frankenberg/Eder and in Schlüchtern, it has already proven over many months that the total phosphorus in the effluent of a wastewater treatment plant can be reduced to monthly average values of only 0.2 mg/l Pges with the adapt 2.0 system with PER, even without additional filtration.
hydrograv adapt 2.0 with PER solves the AFS problem at its cause - the inlet of the secondary clarification - instead of curing the symptoms with one filtration only, which is expensive and energy and maintenance intensive.
The operators' practical experience: extremely reliable with minimum maintenance

Our robust drive solution ensures that all moving parts under water are driven by a single motor. This motor is freely accessible above the water level. Particular emphasis was put on all details of the construction to ensure that no parts can jam under water. Sufficient play ensures that this has not become a problem in the cumulative well over 200 years of operation of all installations. The maintenance effort has therefore been minimal on all our installations for many years.
Of course, the adapt system can move fully automated to the best position due to the connection to the process control system of the sewage treatment plant at any time.
Adapt-2-0
Hydrograv Adapt 2.0

ADAPT 2.0 – The smart solution.

0.2 mg/l Pges in the effluent of wastewater treatment plants now also without filter

Secondary clarifiers are the “problem children” of many wastewater treatment plants, the cause of high effluent turbidity and the “bottleneck” of the hydraulic load capacity of the entire wastewater treatment plant.

The hydrograv GmbH could show that the cause of all these problems is the rigid design of the inlet structures. It appears that a rigid structure is almost always in the wrong place with the wrong geometry: in dry weather too high to minimize the turbidity, in rainy weather too low to not whirl up the settled sludge. Therefore it was clear: the inlet structure must be designed variably, the concept for hydrograv adapt was born.

Since 2018 the adapt system has been proving that very good things can also be improved: since then the patent-pending phosphorus elimination ring – PER – ensures that even clearer water flows out of the tanks. Already in use at several plants, for example in Frankenberg/Eder and in Schlüchtern, it has already proven over many months that the total phosphorus in the effluent of a wastewater treatment plant can be reduced to monthly average values of only 0.2 mg/l Pges with the adapt 2.0 system with PER, even without additional filtration.

hydrograv adapt 2.0 with PER solves the AFS problem at its cause – the inlet of the secondary clarification – instead of curing the symptoms with one filtration only, which is expensive and energy and maintenance intensive.

Installation of the height-variable inlet structure in the last out of six secondary settling tanks at a large wastewater treatment plant.

luftbild-dresden-kaditz

hydrograv adapt at a glance:

The main advantages of the height-variable inlet structure

  • No more sludge overflow by securing the flock filter effect.
  • Less sludge displacement in rainy weather makes for a higher sludge concentration and thus for better degradation capacity in the activation.
  • A lower sludge level and a stable sludge bed lead to increased operational safety.
  • Minimal particulate phosphor and COD in the effluent. On average and in the tips. I.e. sustainable water protection and conservation of wastewater levy.
  • Flock filter in the secondary clarification instead of the downstream filtration. This minimized investment costs and significant energy savings.
  • Ideal support for elimination removal with activated carbon.
  • More mixed water through the wastewater treatment plant.
  • Expanding without building new secondary settling tanks.

Thus hydrograv adapt defines the state of the art in the equipment of secondary settling tanks.
hydrograv adapt – a patented technology of the hydrograv GmbH.

Flow simulations of hydrograv to over one hundred secondary settling tanks show that this concept is almost always cheaper for continuous low effluent values, a high load capacity and the avoidance of sludge overflow.



Abbildung:
Look into two secondary settling tanks of a wastewater treatment plant with an old fixed inlet structure (left) and with the hydrograv adapt inlet structure (right). Significantly fewer flocks in plain water!

In the meantime this rugged construction ensures impressive results for several years on a variety of wastewater treatment plants:

  • Discharge values ​​that can usually only be reached with the installation of sand filter systems – at a fraction of the cost, the energy input and the maintenance requirements.
  • Further phosphor elimination goals can be achieved with hydrograv adapt at a fraction of the previously anticipated financial expenses.
  • Hydraulic loads become reliably treatable, which was considered impossible previously.

Some of many examples of these excellent operating results can be found on the following pages. We gladly send you further references. You are welcome to arrange viewing appointments on wastewater treatment plants in your area with already refitted secondary settling tanks with us as well.

With hydrograv adapt the hydrograv GmbH consequently makes a significant contribution to the environmental protection – while protecting the financial resources of the wastewater treatment plant operators.

THE HYDROGRAV ADAPT INLET SYSTEM

Tried and tested in practice for years

Until today several dozens of hydrograv adapt systems have been installed and prove their reliability cumulatively over several hundred years of operation. The success for our environment in the installations: regularly much clearer wastewater in the outlet than with the previously existing rigid inlet constructions. This also applies to various “rigid optimizations” built by third parties according to CFD analyses, which in the meantime have been replaced by hydrograv adapt with “clear” success.

Successful for the environment

To redefine the state of the art, a technology must reduce the emissions of a plant into the environment to a new, clearly lower level. Exactly this is the result of dozens of installations of hydrograv adapt inlet systems: the average filterable substances measured by the operators are at 2 to 3 mg/l regularly and thus the particulate phosphorus in the effluent of the secondary clarification is at the lowest level. Again and again the total phosphorus effluent values of the wastewater treatment plants equipped with adapt decrease by almost the entire amount of particulate phosphorus – completely without downstream filtration. The state of the art for filterable substances in the effluent of wastewater treatment plants is thus defined by the emission values achievable with adapt systems, which are on average well below 5 mg/l.

Known by experts

The state of the art is establishing itself as a generally accepted rule of the art due to its familiarity among technical experts and its sustained success in practical operation. Both is constituted by hydrograv adapt. Since the success of the prototype in Cologne Weiden more than 10 years ago numerous articles have been published, various lectures at seminars and further education events have been held. Also the wastewater treatment plant operators themselves inform in lectures again and again about the success of the technology, for example at wastewater treatment plant neighbourhood meetings.

Since 2016, the height-variable solution for the inlet geometry of secondary clarifiers has been mentioned in the German standard work of dimensioning, the worksheet DWA-A 131.

hydrograv adapt – Generally accepted rules of technology

All this allows only one conclusion: hydrograv adapt is more than just state-of-the-art technology. The equipment of secondary clarifiers with hydrograv adapt meanwhile fulfils the characteristics of the generally accepted rules of technology!

hydrograv adapt has been enjoying a steadily increasing popularity both nationally and internationally since its first commissioning in 2007. And not only that, the number of adapt installations abroad is also increasing. Always with the same results: clearer water in the effluent with simultaneously increasing efficiency and safety of the secondary clarifiers.

For further information please click here or contact us directly.

“Generally accepted rules of technology” are those techniques which are considered by expert second and third parties from the respective industry as a solution for legally defined goals and which have already proven themselves in practice over several years or will prove themselves in the near future.1

1 https://de.wikipedia.org/wiki/Anerkannte_Regeln_der_Technik

Our successes

HYDROGRAV ADAPT-CONSTRUCTIONS

Cologne-Weiden

hydrograv adapt ensures a working flocculation filtration already in the secondary clarification at any load. And with manageable technical effort, with slight energy requirement and low-maintenance. In addition, so the capacity of the secondary settling tanks is increased.

Sludge overflow and flock output – for all the progress of the wastewater technology, this is still a major problem in many wastewater treatment plants. Yet this leads to

  • unnecessary environmental pollution,
  • high wastewater charges and
  • exceedance of the discharge limits.

It is known that secondary settling tanks have very good discharge values ​​when the sludge is introduced into the tank below the sludge level. Then the flock filter works – and that is as effective as the expensive and energy-intensive downstream technical filters. hydrograv adapt exploits this flock filter always consistently with its height-variability.

IIn September 2007, the first hydrograv adapt inlet structure was put into operation in a secondary settling tank at the wastewater treatment plant Cologne-Weiden. The second secondary settling tank of this wastewater treatment plant is equipped with a conventional fixed inlet structure. A comparison of the operating results of both tanks is advisable.

A tank equipped with hydrograv adapt consistently shows better results:

  • significantly lower sludge level, especially in rainy weather; i.e. higher security against sludge overflow or a higher hydraulic capacity as well,
  • smaller filterable substances and considerably less visible fine flocks in the discharge,
  • greater visibility depth (i.e. clear water),
  • significantly lower floating sludge formation.

Picture: Comparison of sludge level positions in the two secondary settling tanks of the WWTP Cologne-Weiden, on the left a dry weather period, on the right a rain period. Difference of the sludge blanket layers are up to 80 cm.

Picture: qSV charges of 230 % of the permitted limit according to DWA-A 131 could be treated reliably in the hydrograv adapt tank. qA = 2 m/h.

Higher reliable secondary settling tanks enable lower combined sewer overflows in the catchment area, and even that is active water protection, because:

  • Connecting new catchment areas without the need to build a new secondary settling tank.
  • Relieve less wastewater uncleaned – more mixed water through the wastewater plant.
  • Forgo a bypass around the activation – or activate it only at much higher loads.
  • Using released secondary settling tanks for other process steps such as the trace substance elimination.  

  • Picture: Comparison of filterable substance values in the discharge of the two secondary settling tanks of the wastewater treatment plant Cologne-Weiden. Continuously lower filterable substance values of hydrograv adapt tanks on average and in the tips.

Here is a selection of references of hydrograv adapt systems.

The success of an adapt-installation can be seen immediately in the secondary clarifier:
clear water in the outlet and a sinking sludge level. Therefore many of our satisfied customers have already equipped several of their treatment plants with adapt after the installation.

Aachen-Soers

458.333 EW


Altomünster

14.000 EW


Bad Berleburg-Aue

5.800 EW


Bad Berleburg Stadt

18.000 EW


Bad Harzburg

40.000 EW


Bad Marienberg

11.500


Chemnitz

400.000 EW


Dorsten-Wulfen

30.000 EW


Dresden Kaditz

740.000 EW


Dülken

72.000 EW


Erlangen

270.000 EW


Frankenberg/Eder

29.000 EW


Fürth

310.000 EW


Großostheim

35.000 EW


Haimhausen

8.800 EW


Halle-Nord

300.000 EW


Hünfeld

35.000 EW


Ingolstadt

275.000 EW


Jeddah Airport
(Saudi Arabien)

Kevelaer-Weeze

35.000 EW


Köln-Rodenkirchen

88.000 EW


Köln Stammheim

1,5Mio EW


Köln Porz-Wahn

92.000 EW


Köln-Weiden

80.000 EW


Leuzbach

23.000 EW


Ludwigsburg-Hoheneck

167.000 EW


Marburg

155.000 EW


Markt Indersdorf

20.000 EW


Meckesheim

44.000 EW


Moers-Gerdt

200.000 EW


Northeim

75.000 EW


Odelzhausen

8.000 EW


Rednitzhembach

7.900 EW


Regensburg

400.000 EW


Sandhausen

125.000 EW


Schlüchtern

27.500 EW


Schwäbisch Hall

100.000


Stadtlohn

30.500 EW


Weißenfels

76.500 EW


Wolfsburg

170.000 EW

Wuppertal-Kohlfurth

156.000 EW

Broschüre Englisch

Adapt 2.0 at a glance:

Product Brochure (english)


Video

Adapt 2.0 in the video:

Video als .mp4-Datei


Datei fehlt!

Adapt 2.0 – technisches Datenblatt:

Datenblatt (deutsch)
Datenblatt (englisch)

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