The is a globally recognized engineering guideline used for the dimensioning and design of single-stage activated sludge plants . Originally published in May 2000 by the German Association for Water, Wastewater and Waste (DWA, formerly ATV-DVWK), this framework provides municipal and industrial engineers with a rigorous, mathematical methodology to size biological reactors and secondary settling tanks. It ensures structural compliance, cost-efficiency, and strict adherence to environmental effluent limits regarding carbon, nitrogen, and phosphorus removal.
The standard—titled "Dimensioning of Single-Stage Activated Sludge Plants" —establishes a mathematical and empirical framework for sizing wastewater infrastructure serving populations above 5,000 population equivalents (PE). The "E" signifies the official English translation of the originally German Arbeitsblatt (Worksheet). ATV-DVWK-A 131E: Sludge Plant Standards - Scribd Atv Dvwk A 131 E.pdf
ATV-DVWK-A 131E (DWA-A 131) is the German technical standard providing a structured, mathematical framework for the design and calculation of single-stage activated sludge plants. Key updates in the standard focus on COD fractionation for biological modeling and enhanced phosphorus removal. To view a preview of the document, visit Scribd . ATV-DVWK-A 131E: Sludge Plant Standards - Scribd The is a globally recognized engineering guideline used
For the most up-to-date version, the DWA's official shop is the primary source: Key updates in the standard focus on COD