The ATV-DVWK-A 131E standard is a comprehensive German guideline for designing single-stage activated sludge plants, focusing on biological reactor sizing and secondary clarifier performance. Published by the DWA, the 2000 standard provides detailed formulas for nutrient removal, sludge age, and design loads to ensure treatment reliability, particularly for cold climate conditions. For a detailed overview of the standard, you can review the document at AquaEnergy Expo Knowledge Hub GERMAN ATV-DVWK - AquaEnergy Expo Knowledge Hub
"Standard guideline for the dimensioning and design of single-stage activated sludge plants, covering biological treatment, sludge age calculation, and oxygen demand. This is the English language version (E) of the German DWA-A 131 standard." Atv Dvwk A 131 E.pdf
The primary objective of the standard is to ensure that municipal wastewater treatment plants meet or exceed the effluent requirements established by the . It is widely considered one of the most adopted guidelines for wastewater design across Europe. The ATV-DVWK-A 131E standard is a comprehensive German