Based on the peak hourly inflow to prevent overloading the solid-liquid separation. Tank Depth ( hSRh sub cap S cap R end-sub
The standard introduced the use of a design temperature of for the nitrification process, replacing the previous value of 10°C. This change was made to align the standard with the requirements of the German Wastewater Ordinance (AbwV).
Guidelines for the sizing and hydraulic design of clarifiers, as seen in this AquaEnergy Expo overview . Atv Dvwk A 131 E.pdf
Sludge age is the primary controlling parameter within the guideline. It represents the mean residence time of the microorganisms within the system and is strictly adjusted based on the lowest operational wastewater temperature and the designated treatment goal:
The dimensioning of the denitrification zone is now closely linked to the availability of carbon in the influent wastewater. Based on the peak hourly inflow to prevent
It looks like you’ve shared what seems to be a filename for a PDF, possibly related to a technical standard or document (the “A 131” and “DVWK” suggest it might be a German hydrological or engineering guideline — e.g., from the former Deutscher Verband für Wasserwirtschaft und Kulturbau ).
: Formulations for sizing aerated and non-aerated volumes. Guidelines for the sizing and hydraulic design of
The information provided in this article is for general informational purposes only and may not be specific to the exact ATV DWVK A 131 E.pdf model. Always consult the owner's manual and manufacturer's website for specific information on your ATV model.
Due to its high reputation, the ATV-DVWK-A 131 standard has been translated and adapted for use in other countries. In particular, the standard’s design methods are known to have influenced the creation of other national codes, including the Chinese "Code for Design of Outdoor Drainage" (GB 50014). The standard has been officially translated and published in Chinese. The Chinese version, titled was published by Tsinghua University Press on November 1, 2021 . This translation ensures that German engineering principles remain accessible to Chinese engineers and researchers.
The ATV-DVWK-A 131 E worksheet uses several key parameters for design calculations: : BOD volume loading rate [ SV30cap S cap V sub 30 : Sludge volume after 30 minutes ( fCf sub cap C fNf sub cap N : Peak factors for carbon and nitrogen removal hSRh sub cap S cap R end-sub : Sludge removal depth (
