Atv Dvwk A 131 E.pdf -

The successor standard, DWA-A 131, further refined the design rules based on operational experience from numerous large-scale plants. The most significant changes in the 2016 version included:

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 ). Atv Dvwk A 131 E.pdf

Systems serving upwards of 5,000 population equivalents (PE) The successor standard, DWA-A 131, further refined the

Here are some potential specifications for the ATV DWVK A 131 E.pdf: The successor standard

Requires longer sludge ages (often 10 to 14 days depending on the minimum design water temperature, usually evaluated at 10°C or 12°C) to keep slow-growing nitrifying bacteria from washing out of the system.