- Software for the Design of Wastewater Treatment Plants



AQUA DESIGNER is a software tool for the design of the several processes of a wastewater treatment plant, from mechanical treatment via biology up to sludge treatment. Regarding the basis of calculation, the process and the construction all common process variations are to choice. Planning is supported by many auxiliary functions. As result AQUA DESIGNER supplies extensive documents ready to be printed for official documents, including buildings, machines, operating costs and true scaled drawings. AQUA DESIGNER is used world-wide for the planning of treatment plants. The application is available in eleven different languages.

Guided Planning

One of the special characteristics of AQUA DESIGNER is the consistently guidance of the user by a flow diagram. From the first sight you can see the current processing status, the selected way of design or process and the possible alternatives.

Variation of Process and Construction

  • Aerated grit and grease chamber or circulated grit chamber  
  • Primary settling tank as rectangle tank or circular tank
  • Aeration tank as a combinational, compact, rectangle or circulation tank
  • Continuous flow through aeration tank or sequencing bath reactor (SBR)
  • Clarifier as a round, rectangle or cone tank
  • Thickener
  • Sludge digestion as aerobic treatment and aerobic stabilization

Options for Design

  • Plan a new plant
  • Calculate or evaluate the economic efficiency based onoperational costs, mass and oxygen efficiency (SAE)
  • Check existing plants (or parts of them) and include them in your calculation
  • Dimension several lines
  • Direct comparison of calculation methods
  • Accomplish fast calculation
  • Pipe, mass and lifting calculation

Dimensioning Methods

  • ATV-DVWK-A 131 (May 2016) 
    Dimensioning of Single- Stage Activated Sludge plants
  • ATV-DVWK-A 198 
    Standardization and Derivation of Dimensioning Values for Wastewater Facilities (April 2003)
  • DWA-A 202 
    Chemisch-physikalische Verfahren zur Elimination von Phosphor aus Abwasser (May 2011)
  • DWA-M 210 
    Belebungsanlagen mit Aufstaubetrieb (SBR, July 2009)
  • DWA-A 226
    Grundsätze für die Abwasserbehandlung in Belebungsanlagen mit gemeinsamer aerober Schlammstabilisierung ab 1.000 Einwohnerwerte (August 2009)
  • DWA-M 229-1 
    Systeme zur Belüftung und Durchmischung von Belebungsanlagen - Teil 1: Planung, Ausschreibung und Ausführung (May 2013)   
  • DWA-M 368 
    Biologische Stabilisierung von Klärschlamm (June 2014)          

Cleaning Methods

  • Carbon degradation
  • Nitrification
  • Denitrification: upstream, intermittent, combined, simultaneous or cascade
  • External P precipitation
  • Carbon dosage

One of the special characteristics of AQUA DESIGNER is the consistently guidance of the user by a flow diagram. From the first sight you can see the current processing status, the selected way of design or process and the possible alternatives.

Mechanical Treatment

With AQUA DESIGNER you could select the following components:

  • aerated grit and grease chamber
  • circular grit chamber
  • primary settling tank


Basis for dimensioning of the biological stage are different ATV-guidelines (A 126, A 131, M 210 etc.) and work reports, the university algorythm and extensive technical literature.

With AQUA DESIGNER you could dimension the following plants:

  • secondary sedimentation as an inner sedimentation tank, compact-, round-, rectangular tank
  • activated chamber as as ring-, round-, rectangular-, oxidation ditch or cascaded chambers
  • vertical axis, horicontal axis or membranes as disc or tubular aerators
  • dentrifugal or screw pumps as well as air lift pumps
  • scraper or suction remover

Mechanical equipment like pumps, blowers, mixers are available in data bases. The power input of the machines selected here are automatically considered in the operation costs.

True scaled drawings of the buildings and aeration equipment support you while working out or evaluating the design.

Cleaning processes available:

  • carbon degradation
  • nitrification
  • denitrification: separate stage, intermittend, simultaneous, cascaded denitrification
  • phosphorus removal
  • external carbon dosage

With the sludge treatment (according to nach DWA-M 368) an important component of the planning of treatment plants has been integrated in AQUA DESIGNER.

  • Dimensioning of primary settling tank and gravity thickening
  • Anaerobic digestion with production of gas, current and heat
  • load and quantity balance of supernatant and sludge
  • Consideration of internal cycles
  • Extension of the operation costs function by the yield of the use of digester gas

As printout you get a detailed and clear documentation of the calculation. The computing formulars are shown, so the calculaion method is comprehensibly. In this printout you also find detailed information like load variation, oxygen efficiency, sedimentation lines, mass evaluation or buoyancy and a list of the operational costs. Please click left, if you want to see an example.

  • Database für machines for pumps, mixers, blowers and other equipment technology
  • True scaled drawings of construction and aeration system
  • Operation Costs for all treatments including anaerobic sludge digestion
  • Interfaces: Word, Excel, DXF for CAD-Software
  • Variations by specifying values for safety ,fluctuation and peak factors
  • Editing constants, concentrations or the densitiy precipitant

AQUA DESIGNER covers nearly all common forms of construction and process variations. The flexibility when planning is furthermore increased by a whole set of usefull functions.

Design options:

  • check existing plants (parts) and include them into the calculation,
  • dimension several lines,
  • provide a direct comparison of calculation attempts or
  • accomplish a quick calculation

Further modules for plant design:

  • true scaled drawings,
  • diagrams of the results,
  • data bases for machines or
  • operation costs for all treatments including anaerobic sludge digestion.

Variation of calculation:

  • editing constants, concentrations or the densitiy precipitant,
  • simulating different operational conditions by variations of temperature, MLSS or load and
  • specifying values for safety ,fluctuation and peak factors.

Important information, for example:

  • load variation,
  • oxygen efficiency,
  • sedimentation line,
  • pipelinesn,
  • mass- and buoyancy calculation.

  • bulgarian
  • chinese
  • croatian
  • czech
  • english
  • french
  • german
  • hungarian
  • polish
  • romanian
  • slowenian
  • spain

Thus AQUA DESIGNER is applicable world-wide for the planning of new plants, for the extensions and reorganizations of existing sewage treatment plants. New in AQUA DESIGNER is the chinese language version. As result you get a detailed documentation intensively checked by our chinese partners.


Documents can be exported to word, graphics are generated in excel, an DXF-interface provides the drawings for editing for example in CAD-Software.

Our support does not stop with the sales of AQUA DESIGNER:
We offer a really extensive service which does not only cover the operation of AQUA DESIGNER but also gives high qualified support for the design of wastewater treatment plants. That applies also to the comprehensive manual.

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