Atv Dvwk A 131 Epdf Top 2021 Guide

The ATV-DVWK-A 131E is a prominent German standard used for the dimensioning of single-stage activated sludge plants. It provides a standardized framework for calculating the size and operational parameters of biological reactors and secondary settling tanks in wastewater treatment. Core Components of the Guide

Step 2 – Denitrification
Denitrification rate at 12°C:
( r_D = 0.03 , kg , NO_3-N/kg , SS \cdot d )
Required removal = 7 kg/d
Denitrification volume ( V_D = \frac70.03 \cdot 3 = 78 , m^3 ) atv dvwk a 131 epdf top

Where to Obtain

The current version is maintained by DWA (German Water Association) as DWA-A 131 (since 2016 revision). Older ATV-DVWK versions are still used in legacy designs. Official EPDFs are available via DWA’s publishing platform (dwa.de) or technical libraries. The ATV-DVWK-A 131E is a prominent German standard

4.2 Denitrification Volume Fraction

Pre-denitrification volume fraction ( f_D ) is determined from: Older ATV-DVWK versions are still used in legacy designs

Key Calculation Modules

| Parameter | Approach | |-----------|----------| | Sludge age (θTS) | Temperature-dependent, with correction for nitrification | | Denitrification capacity | Based on readily degradable COD / nitrate ratio | | Tank volumes | Simultaneous denitrification in activated sludge reactor | | Secondary clarifier | Solids loading rate and surface overflow rate |