AQUA DESIGNER

Planning the Sewage Treatment Plant

A Flow chart guides you through the complete dimensioning of your wastewater treatment plant project with AQUA DESIGNER.

Process Variants:

• DWA-A 226: Continuous flow activated sludge plants with simultaneous aerobic sludge stabilisation (06/2022)
• DWA-A 131: Dimensioning of single-stage activated sludge plants (06/2016)
• DWA-M 210: Activated sludge plants with sequencing batch reactor operation (07/2009)
• DWA-M 227: Membrane Bioreactor Process (MBR)

Secondary Clarifier

Here too, different variants can be calculated for the secondary clarifiers:

• vertical or horizontal flow
• round or rectangular pools
• basin with flat bottom or hopper tank

Horizontal Flow Secondary Sedimentation

The calculation form for horizontal flow secondary sedimentation shows the connection between dimensioning and structural and technical design. When you define your structure after determining the minimum parameters, the design values are automatically adjusted to the dimensions actually selected. The center inflow building is also calculated for your selection. For all structural calculations, you are supported by true scale drawings.

Cleaning Process

The calculation of the biological stage offers many variants:

• Carbon degradation
• Nitrification
• Denitrification: upstream, intermittent, combined, simultaneous, cascade denitrification
• P-precipitation
• External carbon dosing

Aeration System

Aeration is the heart of every biological treatment. The design for Different load cases and the selection of the appropriate blowers, mixers and aerators is therefore possible in AQUA DESIGNER in great detail. Machines and aerators can be selected from Databanks . The Arrangement of the aerators and agitators in the tank is graphically supported.

Sequencing Batch Reactor (SBR)

Just like the continuous activated sludge process, the sequencing batch reactor or SBR process can also be calculated on the basis of DWA-M 210. Here, too, the dimensioning is followed by the transfer to the structural and mechanical design.

The cycle can be defined in detail separately for dry weather and rainy weather phases. Based on the Sink curves you can see how the sludge level relates to the water level.

MBR Process

The MBR method can be calculated on the basis of DWA-M 227. Here too, Databanks for membranes, aerators, pumps and mixers are available.

Sludge Treatment

With AQUA DESIGNER you can dimension all treatment stages including sludge treatment in accordance with DWA-M 368.

• Dimensioning of primary clarifier and static thickener
• Digestion stage with gas, electricity and heat production
• Load and volume balances for turbid water and solids
• Consideration of internal cycles
• Income from the utilisation of digester gas in accordance with the EEG

Compact Systems

Even smaller systems, e.g. Compact Systems can be calculated very well with AQUA DESIGNER. The automatically generated true scale drawing is very useful to get an idea of the dimensions and proportions. The scale drawing can also be used to recognise whether the equipment. fits well into the building.

Reports

You will receive a detailed and clear documentation of the calculations as a printout. The calculation formulae are shown so that the calculation process is comprehensible. Detailed information such as Load cases, oxygen yield value, sink line, mass and buoyancy calculation, and the Statement of operating costs for the individual cleaning stages can be found in the printout. The reports provide a large part of the documents for the approval planning.

Machines and Measurements

On the basis of your assessment, a List of machines and measuring devices is generated as an Excel List - naturally with the machine data, you have selected from the databases.

The machines and measurements in the list are connected to the Flow Diagram by a numbering system.

Flow Diagram

You can create a flow diagram for the water path and the sludge path. The equipment labelling from the flow diagram corresponds to the labelling in the machine list.
The flow diagram can be exported as graphic, dwg or dxf and thus be further processed in the planning project.

Operating Costs

As the dimensioning is very detailed and practical and a lot of data is taken from databases, the operating costs can also be calculated quite accurately. The Electricity costs, sludge production, precipitant requirements, electricity and heat production are calculated and summarised in a detailed document.

Oxygen Yield Value

The oxygen yield value is a measure of the efficiency of the aeration system. It is calculated by using the machine data from the databases and the aeration characteristics.

True Scale Drawings

In AQUA DESIGNER you define the Chamber dimensions. In Parameter Windows you can also specify wall and base thicknesses and other chamber construction details.  This information is used to create the true scale drawings of the buildings and partly also of the contained equipment. In the drawing above you can see a true scaled plan view of an MBR plant, consisting of the upstream denitrification and the membrane tank.

Buoyancy Calculation

Once the dimensions of the structure are known, the next logical step is to calculate the excavation and concrete masses and calculate the buoyancy.

Individual Parameterisation

Planning projects are never the same and no two wastewater treatment plants look the same. You can vary the design by entering or specifying various constants, concentrations, safety, fluctuation and peak factors or the precipitant density.

Help and AQUA DESIGNER Manual

AQUA DESIGNER contains an extensive help function which, in addition to the operation of the software, offers a comprehensive Theoretical and practical support for system planning .