Optimization of wastewater treatment plants

Optimization of existing wastewater treatment plants

Reduction in energy demand, in the use of inputs or a change in the quantity and concentration at the input: there are many reasons for optimizing existing treatment plants. We assists you in optimizing your wastewater treatment and creates an effluent treatment concept individually tailored to your needs.

7 steps to an optimized treatment facility

To optimize water treatment-dua-resi them is necessary to consider the correct hierarchy of objectives. This is the only way to modify the individual parameters or the treatment plant to meet all your specific requirements and wishes.

Our experts develop a specific concept for this, with which we will optimally adapt wastewater treatment together with you in 7 steps.

Development of an optimization of facilities

  1. Determination of objectives and inventory
  2. Preparation of substance balances
  3. Sketches for optimization
  4. Elaboration of the optimization concept
  5. Planning & engineering
  6. Implementación
  7. Evaluation of the results and final report

Optimization possibilities in wastewater treatment

There is no universal concept for optimizing an effluent treatment facility. Any solution must be developed for the particular project at the customer’s site. However, there are typical approaches that often make new construction completely unnecessary.

Energy cost savings through optimal aeration system

Oxygen is required for the aerobic degradation of organic and / or oxidizable substances contained in wastewater, which can be provided by means of aeration by injection of compressed air or aeration of the surfaces. Besides supplying the necessary oxygen, the systems for the aeration of effluents also have the task of mixing the waste water and the sludge or of preventing the formation of adhering deposits in the tank.

In the case of a biological treatment plant with the activated sludge process, the acquisition costs of a new fan represent only a small fraction of the total cost; however, decisive optimization potentials are being wasted here.


Is your wastewater treatment station still working with classic surface aerators? Using speed-regulated rotary piston compressors can significantly increase the energy efficiency of a biological wastewater treatment plant.

DAS Expert Environmental experts integrate the active or passive aeration system in your installation according to the specific objective.

Adequacy of temperature for optimization of wastewater cleaning

When optimizing the wastewater treatment plant, one must not forget the temperature limit values or the issues related to energy recovery and unpleasant odors.

Too cold partial flows are a problem for anaerobic reactors, since, for their metabolic processes, bacteria are subject to a minimum temperature. But if the water reaches the biological treatment phase too hot, the biomass can be damaged. In this sense, the odors generated by excessively hot effluents are another aspect to be considered.

Especially when the outside temperatures are high, this can cause a nuisance for the inhabitants due to bad smells and should be considered when deciding on an optimization.

In addition, the protection of adjacent waters and their living organisms play another important role in the optimization of facilities. There are public regulations of the competent authorities in the matter of water that determine the temperatures that must be respected for the direct discharge.

Wastewater heat exchanger: Energy and operation efficient wastewater treatment through heat recovery

The waste water that comes from the process that is too hot can be used to heat the cold water. This helps to optimize water flows and reduce the energy demand of wastewater treatment. Our E-Plate heat exchanger is a self-cleaning plate heat exchanger using an optimized brush system. Therefore, it is ideal for highly polluted wastewater.

The continuously rotating brush system reduces dirt to a minimum and also provides a high flow rate. This contributes to considerably increase the performance of the heat exchanger. The additional rotary motion of the brushes allows the waste water to circulate in a spiral, allowing the effect of a countercurrent heat exchanger to be achieved. Thanks to this constructive principle, it can be installed in sewage treatment plants without the need for additional pumps to increase the pressure and does not require expensive measurement and regulation technology.


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