- Adaption of the evaluation of basic data according to the ATV-DVWK A 198
- New way of SBR design according to DWA M 210
- Separate aerobic sludge stabilization at environmental temperature and aerob thermophile
- Improved and extended handling/calculation of partly vertical flown secondary sedimentations
- New type of chamber - Carrouselbecken
- Plate aerator
- Drawing tool with zoom and move
Adaption of dry weather and storm weather inflow to the ATV-DVWK A 198 regulation. This effects mainly the hourly peak factor and the factor for stromweather inflow.
Adaption to ATV-DWK A 198
Among the calculation also some handling tools has been improved.
Excerpt of the updated manual:
After entering the Population Equivalent, a peak factor will be presetted, based on the ATVDVWK A 198 /56/.
The evaluation of specific values and water amounts is mainly based of chapter 4.2.3,„Abflussdaten anhand von Erfahrungswerten“.
For the divisor xQmax an intervall is given, which defines the interval between QT,h,max and QT,2h,max. AQUA DESIGNER presets the lower value QT, h, max.
Fig. 2: Divisor xQmax depending on PE /56/
The rain water flow QM will be evaluated by fS,QM. Also this value will be interpolated, depending on the PE.
Fig. 3: Interval of fS,QM for the evaluation of the rainwater flow to the wwtp /56/
Adaption to the DWA M 210, July 2009
The way of design has completely been revised and in our opinion now it is much more transparent. The main case for the reactor volume is sedimentation property of the sludge, respectively the distance between water level and sludge level. The design will be supported by graphical displays, so that you clearly discover, how the calculation reacts by changing a
The documentation of the design calculation is very detailedand comprehensive. It consists of about 20 pages.
Some screenshots of the new formulas:
Fig. 4: Evaluation of the required reactor volume for dry weather and wet weather.
Fig. 5: Configuration of the chambers and verification for three hydraulic load cases
Fig. 6: Calculation of the denitrification for a chosen number of feeds. Verification for biological phosphor elimination and the denitrification capacity.
AQUA DESIGNER now comprises all common sludge stabilization processes, form simultaneous aerobic sludge stabilization, via separate aerobic sludge stabilization at environmental temperature of aerob thermophil, to the anaerobic digestion.
Fig. 7: Example aerob thermophile sludge stabilization
For example this tool can be usefull, if you have to estimate the air demand for an additional aeration of a sludge tank.
The ATV-DVWK A 131 defines, what are the conditions for the intermediate section between vertical and horizontal flow.
This table has been implemented in a way that now you can design the secondary sedimentation with high variability. The interpolated values will be displayed, so that you can handle the parameters very flexibel.
Fig. 8: Formular for the design of partly vertical flown secondary sedimentations
- Calculation of the BOD5-Degredation
- Integration of the separate aerobic sludge stabilizatio into the operational costs
- Additional chamber form – Activated chamber as Carrousel chamber
- Plate Aerators in the aeration tool
- Drawings now can be zoomed or moved
Fig. 9: Activated chamber as Carrousel chamber
Fig. 10: Plate Aerators in the aeration tool; Drawings now can be zoomed or moved